Download - 7SA522 Catalogue
SIPROTEC 47SA522
Distance Protection Relay forTransmission Lines
Protection Systems
Catalog SIP 4.2 • 1999
SIPROTEC 47SA522
Distance Protection Relay
for Transmission Lines
Protection Systems
Functions Pages 12 to 17
Typical fields application Pages 18 to 20
Siemens AG 1999
Description/Overview Pages 2 to 11
Technical data Pages 21 to 31
Advantages to you Cost-effectiveness,
high degree of automation
User-friendly operation
Low planning and engineeringeffort
Fast, flexible mounting,reduced wiring
Simple, short commissioning
Simple spare part stocking,high flexibility
High reliability and availability
State-of-the-art technology
Compliance with internationalstandards
Integration in the overall system
SIPROTEC 4-SICAM-SIMATIC
Selection andordering data Pages 32 and 33
Firmware V4
Catalog SIP 4.2 • 1999
Accessories Page 34
Trip time curves Page 35
Connection diagrams Pages 36 to 41
Dimension drawings Pages 42 to 44
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
Description
Application
The 7SA522 relay providesfull scheme distance protec-tion and incorporates all func-tions usually required for theprotection of a power line.The relay is designed to pro-vide fast and selective faultclearance on transmissionand subtransmission over-head lines and cables. Thiscontributes towards impro-ved stability and availabilityof your electrical powertransmission system. The po-wer system star point canbe solid or impedance groun-ded (earthed). The 7SA522 issuitable for single- andthree-phase tripping applica-tions with and without pilot-(tele-) protection schemes.
The effect of apparent impe-dances in unfaulted faultloops is eliminated by asophisticated and improvedmethod which uses patternrecognition with symmetricalcomponents and load com-pensation. The correct phaseselection is essential for se-lective tripping and reliablefault location.
During network powerswings an improved powerswing blocking feature pre-vents the distance protectionfrom unwanted tripping andoptionally provides controlledtripping in the event of lossof synchronism (out of step).This function guarantees po-wer transmission even undercritical network operatingconditions.
Maximum Lifetime andReliability
The 7SA522 hardware is ba-sed on 20 years of experi-ence by Siemens with nume-rical protection. State-of-the-art 32 bit microprocessortechnology is employed.Naturally the device complieswith the latest standards andtechniques for electromagne-tic compatibility. The overallnumber of electronic compo-nents is substantially redu-ced by using large-scale inte-grated circuits.
The relay software is desig-ned in accordance with highlevel programming languagetechniques. The long experi-ence in manufacturing nume-rical relays provide the basis
for a modern software struc-ture. This along with modernmanufacturing techniquesand quality controls ensuremaximum lifetime and relia-bility.
Cost-effective powersystem management
The SIPROTEC 4 units arenumerical relays which alsoprovide control and monito-ring functions and thereforesupport the user in view of acost-effective power systemmanagement. They contribu-te towards the reliablesupply of electric power tothe customers.
Local operation has been de-signed according to ergono-mic criteria. Large, easy-to-read displays are a major de-sign aim.
The SIPROTEC 4 units havea uniform design and a de-gree of functionality whichrepresents a whole newlevel of quality in protectionand control. If the applicati-on requirements change therelays may be adaptedquickly by entering new set-tings without any additionalhardware costs.
The use of powerful micro-controllers and the applica-tion of digital measured valueconditioning and processinglargely suppresses the influ-ence of higher-frequencytransients, harmonics andDC components.
Back-up protection
The unit can also be used asbackup distance and overcur-rent protection for all typesof differential protectionequipment.
Add-on protectivefunctions
The 7SA522 incorporates se-veral protective functionsusually required for transmis-sion line protection. Theseare
− High-resistance earth faultprotection
− Phase overcurrent protec-tion
− STUB bus overcurrent sta-ge
2 Siemens SIP 4.2 · 08/99
− Overvoltage protection
− Automatic reclosure
− Synchrocheck
− Circuit breaker failure pro-tection.
Programmable logic
The integrated programma-ble logic functions allow theuser to implement his ownfunctions for the automationof a switchgear (interlocking)or a substation via a graphicuser interface. The user canalso generate user-definedmessages and logical combi-nations of internal or externalsignals.
Local and remotecommunication
The SIPROTEC 4 units provi-de several serial communica-tion interfaces for varioustasks:
− Front interface for connec-ting a PC
− IEC system interface forconnecting to a controlsystem viaIEC 60870-5-103 orProfibus-FMS/DP,Modbus RTU,DNP3.0
− Prepared for Ethernet(UCA)
− Modem interface for con-necting a PC via modemand/or starcoupler
− Time synchronization viaIRIG-B/SCADA (DCF 77)
The 7SA522 relay has twoadditional optional interfacesfor communication with theremote relay or process bus.It is therefore well preparedfor future communicationstandards.
Operational indicationsand fault indications withtime stamp
The SIPROTEC 4 units provi-de extensive data for faultanalysis as well as control.All indications listed beloware protected against powersupply failure.
− Fault event recordThe last eight fault casesare always stored in theunit. All fault recordingsare time stamped with aresolution of 1 ms.
− Operational indicationsAll indications that are notdirectly associated withthe fault (e.g. operating orswitching actions) are sto-red in the status indicationbuffer. The time resoluti-on is 1 ms.
Reliable batterymonitoring
The internal battery is usedto back-up the clock, swit-ching statistics, status andfault indications and fault re-cording in the event of a po-wer supply failure. Its func-tion is checked by the pro-cessor at regular intervals. Ifthe capacity of the battery isfound to be declining, analarm is generated. Routinereplacement is therefore notnecessary. All setting para-meters are stored in theFlash-EPROM, and thereforenot lost if the power supplyor battery fails.
User-friendly localoperation
Many advantages can alreadybe found on the clear anduser-friendly front panel:
Positioning and grouping ofthe keys support the naturaloperating process.
A large non-reflective back-litdisplay provides clearinformation display.
Programmable (freely assign-able) LED’s for importantmessages are provided. Ar-row keys ensure an easy na-vigation in the function tree.
Operator-friendly input of theset values via the numerickeys or DIGSI 4 is provided aswell as four programmablekeys for frequently usedfunctions at the push of a but-ton.
Siemens SIP 4.2 · 08/99 3
Operational measuredvalues
The large scope of measuredand limit values permits im-proved system managementas well as simplified commis-sioning.
Control
The integrated control functi-ons permit control of circuitbreakers or isolators (electri-cally operated/motorized dis-connectors) via the integra-ted operator panel, binary in-puts, DIGSI 4 or the substati-on control system (e.g.SICAM).
A full range of control execu-tion functions is provided.
Time synchronization
A battery backed clock is al-ways provided and can besynchronized via a synchro-nization signal (DCF77,IRIG-B via satellite receiver),binary input, system inter-face or SCADA (e.g. SICAM).A date and time is assignedto every indication.
Assignable binary inputsand outputs
Binary inputs, outputs andLED’s can be assigned toperform specific functions asdefined by the user.
Selectable function keys
Four function keys can be as-signed to permit the user toperform frequently recurringactions very quickly andsimply.Typical applications are, forexample, jumps to a givenposition in the menu tree inorder to display the list ofoperating indications or toperform automatic functions,such as ”Switching of cir-cuit-breaker”.
Continuous self-monitoring
The hardware and softwarecomponents are continuouslymonitored. If abnormal condi-tions are detected, the unitsignals them immediately. Inthis way, a high level of safe-ty, reliability and availability isachieved.
52Local/Tele Ctrl.Commands
CB Indications
74TC
Trip Circuitsupervision
86
Lockout
21
Distance
21N
6868T
Power
Swing
FL
FaultLocator
50N51N
GndO/C
67N
DirectionalGround
5051
Over-current
50N-251N-2
85-21
Pilot
Dist.
85-67N
Pilot
Gnd
50HS
Switch
onto-Flt. O/C
50STUB
STUBO/C
Weak
infeed
27WI 25
Synchro-check
79Auto-
reclosure
59
Over-
voltage
50BF
Bkr.
fail.
Operat.values
Super-
visionPilot schemes can useone channel or tworedundant channels to
the remote end
Serial Communication
Interfaces
CFC Logic
Note: Pilot schemes = Teleprotection
Figure 1
Single line diagram
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
Description
Local operation
All operator actions can beexecuted and informationdisplayed via an integrateduser interface.
On the LCD display,substation and device in-formation can be displayedas text in various lists.Frequently displayed infor-mation includes measuredanalog values, binary infor-mation about the state of theswitchgear and the device,protection infor- mation, gen-eral indications and alarms.
14 assignable (configurable)LEDs are used to displayplant or device information.The LEDs can be labelledaccording to user require-ments. An LED reset key re-sets the LEDs.
4 configurable function keyspermit the user to executefrequently used actions sim-ply and fast. Typical applica-tions include jumps to cer-tain points in the menu treeto display the operationalmeasured values, or execu-tion of automatic functionssuch as: ”Operate the cir-cuit-breaker”.
4 Siemens SIP 4.2 · 08/99
RS232 operator interface
Numerical keys for easy data entry
Figure 2
Front view SIPROTEC 4 7SA522
Keys for navigation
Description
Connection techniquesand housing with manyadvantages
1/2 and 1/1-rack sizes: Theseare the available housingwidths of the SIPROTEC 47SA522 relays, referred to a19" module frame system.This means that previousmodels can always be repla-ced. The space required inthe switchgear cubicle is thesame. The height is a uni-form 243 mm (9.57 inches)for all housing widths. Allcables can be connectedwith or without ring lugs.Plug-in terminals are avail-able as an option.
Figure 5
Rear view with terminal covers andwiring
Figure 4
Rear view with screw terminals and serialinterfaces
Siemens SIP 4.2 · 08/99 5
Figure 3
Housing widths 1/2 x 19’‘ and 1/1 x 19’‘
Figure 6 DIGSI 4 – Main menu
Figure 7 DIGSI 4 – Device configuration
Figure 8 DIGSI 4 – Configuration matrix
DIGSI 4
The PC operating programDIGSI 4 is the interface bet-ween the user and theSIPROTEC 4 units. It has amodern PC operator inter-face in accordance with theWindows versions 95/98/NT4.0. With DIGSI 4 theSIPROTEC 4 units can beconfigured and interrogated -it is a tailored program for theelectrical supply industries.
6 Siemens SIP 4.2 · 08/99
DIGSI 4 matrix
The DIGSI 4 matrix providesthe user with an overall viewof the unit configuration at aglance. For example, all LEDsand the configuration of thebinary inputs and output re-lays are displayed in a singlechart. And with one click ofthe mouse button connec-tions can be made.
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
DIGSI 4 Operating Program
Siemens SIP 4.2 · 08/99 7
DIGSI 4 Operating Program
Convenient protectionfunctions setting:Secondary or Primary
The settings can be enteredand displayed as secondaryor primary values. Switchingbetween secondary and pri-mary is done by clicking onthe corresponding symbol inthe tool bar.
Commissioning
Special attention has beenpaid to commissioning. Allbinary inputs and output con-tacts can be displayed andactivated directly. This cansimplify the wiring checksignificantly for the user.
CFC: Programming logic
With the help of the CFC gra-phic tool (Continuous Func-tion Chart) interlocks andswitching sequences can beconfigured simply via dragand drop of logic symbols; nospecial knowledge of soft-ware is required. Logical ele-ments, such as AND, OR,flip-flops and timer elementsare available. The user canalso generate user-definedannunciations and logicalcombinations of internal orexternal signals.
Figure 9
CFC (Continuous Function Chart)
The new DIGSI 4 Easy to learn
Clear layout of routing matrix
Substation, feeder and equipmentdata management
Password protection
Linked with the SICAM/SIMATICsoftware environment
Windows standards
8 Siemens SIP 4.2 · 08/99
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
Figure 11
Systems control bus and service bus
Figure 10
SICAM/SIPROTEC 4 architecture
Office
Modemaccess
Rear of unit
SIPROTEC 4Front interface
Systemscontrol
SICAM/SIPROTEC 4
Database
SICAM WinCC
DIGSI 4
SICAM plusTOOLS
Bay control units
Datamanage-ment
Software Communi-cation
Various commu-nication protocols
SCADA
CPU
Central I/O
Protection devices
IEC 60870-5-103/Profibus-FMS
ServiceBus
System SIPROTEC 4/SICAM
SIPROTEC 4 as an integral partof SICAM energy automationsystem
SIPROTEC 4 is tailor-made for usein the SIMATIC-based SICAMenergy automation system. TheSICAM family consists of the fol-lowing components:
− SICAM RTU, the modern tele-control system with automationand programmable logic functi-ons
− SICAM SAS, the modern inte-gration of switchgear automati-on and information technology
− SICAM PCC, the informationand communication technologyon a PC basis
Data management and communi-cation is one of the strong pointsof the SICAM and SIPROTEC 4system. Powerful engineeringtools (SICAM plus TOOLS basedon STEP7 and SICAM Win CC)make working with SICAM con-venient. The SIPROTEC 4 unitsare optimally matched for use inSICAM SAS and SICAM PCC.With SICAM and SIPROTEC 4continuity exists at three centralpoints:
− Data management
− Software architecture
− Communication.
All central system components(SICAM and SIPROTEC 4 CPUs,SICAM WinCC, SICAM plusTOOLS, bay controllers and pro-tection equipment), as well as theDIGSI 4 operating program, areestablished on the same basis.The ability to link SICAM/SIPRO-TEC and other components of thesubstation control, protection andautomation is assured via openinterfaces, such asIEC 60870-5-103 or PROFIBUS.
Service interface
The service interface can be usedas a 2nd operating interface.DIGSI 4 offers the additional pos-sibility of accessing bay control-lers via modem. Thus the fullrange of DIGSI 4 functionality isavailable at the office desk orwhen travelling (by laptop and mo-dem). This permits rapid and ex-tensive access for the service per-sonnel. All settings and controlcommands are available and it ispossible to read the operationaland fault event logs, fault recordsas well as ope- rational measuredvalues.
Rear of unit
SIPROTEC 4Front interface
Rear of unit
SIPROTEC 4Front interface
Service vehicle
Star coupler
All SIPROTEC units operate alsowith the proven star coupler. Thestar coupler is used for simpleapplications which also give theuser an alternative method ofretrieving information remotely.
Siemens SIP 4.2 · 08/99 9
SIPROTEC 4/SICAM system
Figure 12
SICAM SAS communication structure
SICAM WinCCOperation and monitoringarchive, configuration station
Telecontrol interafce tosystem control centers(e.g. IEC 60870-5-101)
DIGSI 4
Automationsystems(e.g. SIMATIC)
Time synchro-nisationDCF77, GPS
SICAM SC
IEC 60870-5-103
Profibus FMS
ControlProtection/control
Protection1) Protection and control 2) Protection and control
in seperate units. in one unit.
2) 2) 1) 2) 1) 2)
1)
7SJ61/62 6MD/7SJ63 6MB525 7SJ61/62 6MD63 7SJ637SJ61/626MD63
IEC 60870-5-103
Figure 13
Communication via star coupler
7SJ6007SA5117UT51SD517SJ51
6MB525
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
10 Siemens SIP 4.2 · 08/99
Digital communication
With respect to communica-tion, particular emphasis isplaced on the customer re-quirements in energy auto-mation:
− Every data item is time-stamped at the source, i.e.where it originates.
− The communication sy-stem automatically handlesthe transfer of large datablocks (e.g. fault recor-dings or parameter datafiles). The user has accessto these features withoutany additional program-ming effort.
− For the safe execution of acontrol command the cor-responding data telegramis initially acknowledged bythe device which will exe-cute the command. Afterthe release and executionof the command a feed-back signal is generated.At every stage of the con-trol command executionparticular conditions arechecked. If these are notsatisfied, command execu-tion may be terminated in acontrolled manner.
Local PC interface
The PC interface accessiblefrom the front of the unit per-mits quick access to all para-meters and fault event data.The use of the DIGSI 4 opera-ting program is particularlyadvantageous during com-missioning.
Remote relay interface (**)
Most pilot- (tele-) protectionschemes could be implemen-ted using digital serial com-munication. The 7SA522 iscapable of remote relaycommunication via directlinks or multiplexed digitalcommunication networks.
Safe bus architecture forsubstation controlinterface
RS485 busWith this data transmissionvia copper conductors,electromagnetic fault influ-ences are largely eliminated
by the use of twisted-pairconductors. Upon failure ofa unit, the remaining sy-stem continues to operatewithout any problem. Fiber optic double ring
circuitThe fiber optic double ringcircuit is almost immune toelectromagnetic interfe-rence. Upon failure of a sec-tion between two units, thecommunication system con-tinues to operate withoutdisturbance. It is generallyimpossible to communicatewith a unit that has failed. Ifa unit were to fail, there isno effect on the communi-cation with the rest of thesystem.
Retrofitting: Modules forevery type of commu-nication
Communication modules areavailable for the entireSIPROTEC 4 unit range. Thisensures that a range of com-munication protocols can beused. No external converteris required.
IEC 60870-5-103
IEC 60870-5-103 is an interna-tionally standardized protocolfor efficient communicationwith protection relays. IEC60870-5-103 is supported bya number of protection de-vice manufacturers and isused world-wide.
PROFIBUS-FMS (*)
PROFIBUS-FMS is an interna-tionally standardized commu-nication system (EN 50170)for communication problemsolving. Profibus is supportedinternationally by severalhundred manufacturers andhas to date been used inmore than 1,000,000 applica-tions all over the world.Connection to a SIMATICS5/S7 programmable control-ler is made on the basis ofthe data obtained (e.g. faultrecording, fault data, measu-red values and control func-tionality) via the SICAMenergy automation system.
Figure 14
IEC 60870-5-103 star type RS232 copper conductor connection or fiberoptic connection
Figure 15
Profibus: Optical double ring circuit
Figure 16
Profibus: RS485 copper conductor connection
OLM1)
Communication
(*) available with next firmware release(**) in preparation1) Optical Link Module
Siemens SIP 4.2 · 08/99 11
Profibus DP (*)
Profibus DP is an industrialcommunications standardand is supported by anumber of PLC and protec-tion device manufacturers.
Modbus RTU (*)
Modbus RTU is a recognizedindustrial communicationsstandard and is supported bya number of PLC and protec-tion device manufacturers.
DNP 3.0 (*)
DNP 3.0 (Distributed Net-work Protocol version 3) is acommunications protocolbased on messages. TheSIPROTEC 4 units are fullyLevel 1 and Level 2 compli-ant with DNP 3.0. DNP 3.0 issupported by a number ofprotection device manufac-turers.
Ethernet UCA (**)
UCA (Utility CommunicationsArchitecture) is a developingcommunications protocolspecifically designed for sub-station automation. When itbecomes an internationalstandard, the SIPROTEC 4units are prepared to supportit. Simply plug in a new com-munication module.
Communication
Figure 17
Optical fiber communication module
Figure 18
RS232/RS485 electrical communication module
Figure 19
Fiber optical double ring communication module
(*) available with next firmware release(**) in preparation
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
12 Siemens SIP 4.2 · 08/99
Figure 21
Distance protection: MHO characteristic
Distance protection(ANSI 21, 21N)
Full-scheme design
The main function of the7SA522 is a full-scheme di-stance protection. By parallelcalculation and monitoring ofall six impedance loops ahigh degree of sensitivity andselectivity is achieved for alltypes of faults. The shortesttripping time is less than onecycle. Single- and three- poletripping is possible.
MHO and quadrilateralcharacteristics
The 7SA522 relay providesquadrilateral as well as MHOzone characteristics. Bothcharacteristics can be usedseparately for phase andground faults. Resistanceground faults can for instan-ce be covered with thequadrilateral characteristicand phase faults with themho characteristic.
Load bias
In order to guarantee a relia-ble discrimination betweenload operation and short cir-cuit – especially on long highloaded lines – the relay isequipped with a selectableload encroachment characte-ristic. Impedances within thisload encroachment charac-teristic will prevent the dis-tance zones from unwantedtripping.
Absolute phase-selectivity
The 7SA522 distance protec-tion incorporates a well pro-ven highly sophisticated pha-se selection algorithm. Thepickup of unfaulted loops iseliminated to prevent theadverse influence of currentsand voltages in the fault freeloops. This phase selectionalgorithm achieves singlepole tripping and correct di-stance measurement in awide application range.
Parallel line compensation
The influence of wrong di-stance measurement due toparallel lines can be compen-sated by feeding the neutralcurrent of the parallel line to
the relay. Parallel line com-pensation can be used for di-stance protection as well asfor the fault locator.
6 zone packages
Five independent distancezones and one separateoverreach zone for zoneextension schemes areavailable. Each distance zonehas separate time stages,partly valid for single phaseor multi-phase faults.Ground faults are detectedby monitoring the neutralcurrent 3I0 and the zero se-quence voltage 3V0.
Quadrilateral
The quadrilateral trippingcharacteristic permits sepa-rate setting of the reactanceX and the resistance R. Theresistance section R can beset separately for faults withand without ground involve-ment. This characteristic hastherefore an optimal perfor-mance in case of faults withfault resistance. The distancezones can be set forward, re-verse or non-directional.Sound phase polarization andvoltage memory provides adynamically unlimited direc-tional sensitivity.
MHO
The mho tripping characteris-tic provides sound phase res-pectively memory polariza-tion for all distance zones.The example in figure 21shows the characteristic for aforward fault where the mhocircle expands to the sourceimpedance but never morethan the selected impedancereach. This mho circle expan-sion guarantees safe and se-lective operation for all typesof faults even for close-infaults.
Insensitive to measuringvalue distortion
Digital filtering of themeasured values makes theprotection unit insensitive todisturbances in the measu-red quantities. In particularthe influence of DC compo-nents, capacitive voltagetransformers and frequencychanges are reduced.
Functions
X
R
forwards
forw
ard
s
revers
e
reverse
ϕ LoadLoad
Z1
Z2
Z4
Z3
Z1B
Z5
Line
α
X
R
ϕ
Z1
Z2
Z4
Z1B
Z5
Line
Z3 (if revers)
Load Load
Figure 20
Distance protection: quadrilateral characteristic
Fuse failure monitoring
The loss of the secondaryV.T. circuit voltage blocks thedistance protectionautomatically and preventsthe relay from unwantedtripping. The secondary V.T.voltage is supervised by theintegrated fuse failuremonitor. A pickup of the fusefailure monitor as well as the
V.T.-mcb binary input blockthe distance protection andcan act ivate the backupovercurrent protection.
Siemens SIP 4.2 · 08/99 13
Functions
A serial remote relay interfaceis in preparation for direct con-nection to a digital communi-cation network
7SA522 also permits the trans-fer of phase-selective signals.This function requires threechannels for each direction.
This feature is particularly ad-vantageous as it permits toexecute reliable single-pole trip-ping, even if two single-phasefaults occur on different lines.The transmission methods aresuitable also for lines with threeends (three-terminal lines). Pha-se-selective transmission isalso possible with multi-endapplications, if some user spe-cific linkages are implementedby way of the integrated CFCLOGIC. During disturbances inthe transmission receiver or onthe transmission circuit, the pi-lot protection function can beblocked by a binary input signalwithout loosing the zone selec-tivity. The control of the overre-ach zone Z1B (zone extension -can be switched over to the au-toreclosure function. A transi-ent blocking function (Currentreversal guard) is provided toovercome current reversals re-sulting from the clearance ofshort circuits on parallel lines.
Figure 22
Power swing current and voltage wave forms
Direct transfer tripping
There are various conditionson the power system whichnecessitate the remote trip-ping of the circuit breakerfrom the protection position.The 7SA522 relay is equip-ped with phase-selective in-tertripping signal inputs andoutputs.
Figure 23
Power swing circle diagram
Fault locator
The integrated fault locator cal-culates the fault impedanceand the distance-to-fault. Theresult is displayed in ohms, mi-les, kilometers or in percent ofthe line length. Parallel line andload current compensation isalso available.
Power swing detection(ANSI 68, 68T)
Dynamic occurrences, for in-stance short circuits, load fluc-tuations, autoreclosures orswitching operations can causepower swings in the transmis-sion network. During powerswings, large currents alongwith small voltages can causeunwanted tripping of distanceprotection relays. To avoid un-controlled tripping of the dis-tance protection and to achievecontrolled tripping in the eventof loss of synchronism the7SA522 relay is equipped withan efficient power swing de-tection function. Power swingscan be detected under symme-trical load conditions as well asduring single pole autoreclosu-res.
Pilot- (Tele-) protection fordistance protection(ANSI 85-21)
A pilot protection function isavailable for fast clearance offaults up to 100% of the linelength. The following operatingmodes may be selected:
− PUTT, permissive underre-aching zone transfer trip
− POTT, permissive overre-aching zone transfer trip
− UNBLOCKING
− BLOCKING
− DUTT, direct underreachingzone transfer trip (togetherwith Direct Transfer Tripfunction)
The carrier send and receivesignals are available as binaryinputs and outputs and can beassigned freely to each physi-cal relay input or output. Atleast one channel is requiredfor each direction.
Common transmission chan-nels are power-line carrier, mi-crowave radio and fiber-opticlinks.
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
Functions
14 Siemens SIP 4.2 · 08/99
Figure 24
Normal inverse
Weak infeed protection:echo and/or trip(ANSI 27 WI)
To prevent delayed trippingof permissive schemesduring weak or zero infeedsituations, an echo functionis provided. If no faultdetector is picked up at theweak infeed end of the line,the signal received here isreturned as echo to allowaccelerated tripping at thestrong infeed end of the line.It is also possible to initiatetripping at the weak infeedend. A phase-selective 1-poleor 3-pole trip is issued if apermissive trip signal (POTTor Unblocking) is receivedand a if the phase-ground(earth) voltage drops cor-respondingly.
Directional ground (earth)fault overcurrent protec-tion for high-resistancefaults(ANSI 50N, 51N, 67N)
In grounded (earthed) net-works the sensitivity of theground distance protectionmay not cover ground faultswith high fault resistances.The 7SA522 protection relayhas therefore protectionfunctions for high-resistanceground faults of this nature.
The ground fault overcurrentprotection can be used with3 definite time stages andone inverse time stage(IDMT). A 4th definite timestage can be applied insteadof the one inverse timestage.
The available ANSI/ IEEE in-verse-time curves are:
• Inverse• Short inverse• Long inverse• Moderately inverse• Very inverse• Extremely inverse• Definite inverseAn additional logarithmic in-verse time characteristic isalso available.
The direction decision is per-formed with the neutral cur-rent and the zero sequencevoltage or with the negativesequence components V2and I2. In addition or as analternative to the directionaldetermination with zero
sequence voltage, the star-point current of a groundedpower transformer may alsobe used for polarization. Dualpolarization applications cantherefore be fulfilled. Eachovercurrent stage can be setin forward or reverse direc-tion or for both directions(non-directional).
As an option the 7SA522relay can be provided with asensitive neutral (residual)current transformer. Thisfeature provides a measuringrange for the neutral (residu-al) current from 5mA to 100Awith a nominal relay currentof 1A and from 5 mA to 500Awith a nominal relay currentof 5A. Thus the ground faultovercurrent protection can beapplied with extremesensitivity.
The function is equippedwith special digital filter algo-rithms, providing the elimina-tion of higher harmonics.This feature is particularly im-portant for low zero sequen-ce fault currents which usual-ly have a high content of 3rd
and 5th harmonic. Inrush sta-bilization and instantaneousswitch-onto-fault trip can beactivated separately for eachstage as well.
Different operating modescan be selected. The groundfault protection may beblocked during the dead timeof single-pole autoreclose cy-cles or during pickup of thedistance protection.
Pilot protection fordirectional ground (earth)fault protection(ANSI 85-67N)
The directional ground faultovercurrent protection can becombined with one of the fol-lowing pilot schemes:
• Directional comparison• BLOCKING• UNBLOCKING.The transient blocking func-tion (current revresal guard)is also provided to overcomecurrent reversals resultingfrom the clearance of shortcircuits on parallel lines.
The pilot functions for dis-tance protection and forground (earth) fault protec-
tion can use the same sig-nalling channel or two sepa-rate and redundant channels.
Backup overcurrentprotection(ANSI 50, 50N, 51, 51N)
The 7SA522 provides abackup overcurrent protec-tion. Two definite timestages and one inverse timestage (IDMTL) are available,separately for phase currentsand for the neutral (residual)current. Two operatingmodes are selectable. Thefunction can run in parallel tothe distance protection oronly during interruption ofthe voltage in the secondaryVT circuit (emergency opera-tion).
The secondary voltage inter-ruption can be detected bythe integrated Fuse Failuremonitor or via a binary input
of a VT miniature circuitbreaker (VT m.c.b. trip).
The available ANSI/ IEEE in-verse-time curves are:
• Inverse• Short inverse• Long inverse• Moderately inverse• Very inverse• Extremely inverse• Definite inverse
STUB bus overcurrentprotection(ANSI 50(N)-STUB)
The STUB bus overcurrentprotection is a separatedefinite time overcurrentstage. It can be activatedfrom a binary input signallingthe open line isolator (discon-nector).
Settings are available forphase and ground (earth)faults.
( )t
I IT
P
P=
−⋅014
10 02
.
/.
Siemens SIP 4.2 · 08/99 15
Functions
Instantaneous high-speedswitch-onto-fault overcur-rent protection(ANSI 50HS)
Instantaneous tripping is pos-sible when energizing a faul-ty line. On definite large-faultcurrents, the high-speedswitch-onto-fault overcurrentstage can initiate very fast 3-pole tripping.
With lower fault currents, in-stantaneous tripping afterswitch-onto-fault is also pos-sible with the overreach di-stance zone Z1B or just withpickup in any zone.
The switch-onto-fault initiati-on can be detected via thebinary input ”manual close”or automatically via mea-surement.
Overvoltage protection(ANSI 59)
Impermissible overvoltagescan occur on long transmissi-on lines without or with lowload. The 7SA522 protectionrelay contains an overvoltageprotection function. Two sta-ges are available: One phase-segregated stage and onezero-sequence voltage stage.The residual voltage from abroken-delta VT winding canbe directly measured via theV4-voltage transformer input(Ven-voltage) or can becalculated internally as 3V0.Tripping can be performed atthe local circuit breaker or atthe remote end of the line bysending an intertripping si-gnal.
Breaker failure protection(ANSI 50BF)
The 7SA522 relay incorpora-tes a two-stage circuit-brea-ker failure protection to de-tect failures of tripping com-mands execution, for examp-le due to a defective circuit-breaker. The current detec-tion logic is phase-segrega-ted and can therefore also beused in single-pole trippingschemes. If the fault currenthas not been interrupted af-ter a settable time delay is
expired, a retrip command orthe busbar trip command isgenerated. The breaker failu-re protection can be initiatedby all integrated protectionfunctions as well as by exter-nal devices via binary inputsignals.
Automatic reclosing(ANSI 79)
The 7SA522 relay is equip-ped with an automatic reclo-sing function (AR). The func-tion includes several opera-ting modes:
• 3-pole auto reclosing for alltypes of faults; differentdead times are available de-pending the type of fault
• 1-pole auto reclosing for 1-phase faults, no reclosingfor multi-phase faults
• 1-pole auto reclosing for 1-phase faults and for 2-phasefaults without earth, no -reclosing for multi-phasefaults
• 1-pole auto reclosing for 1-phase and 3-pole auto reclo-sing for multi-phase faults
• 1-pole auto reclosing for 1-phase faults and 2-phasefaults without earth and 3-pole auto reclosing for otherfaults
• Multiple-shot auto reclosing• Interaction with an external
device for automatic reclo-sing via binary inputs andoutputs
• Control of the integrated ARfunction by external protec-tion
• Interaction with the internalor an external synchronismcheck
• Monitoring of the circuit-breaker auxiliary contacts
• Voltage check for discrimi-nation between successfuland non-successful recloseattempts
In addition to the above men-tioned operating modes, se-veral other operating princip-les can be performed bymeans of the integrated pro-grammable logic (CFC).
Synchronism check(ANSI 25)
The synchronism and voltagecheck function will ensurethat the stability of the net-work will not be endangeredwhen a line is switched ontoa busbar. For this purpose asynchronism check functionis provided. After verificationof the network synchronismthe function enables theCLOSE command. Alternati-vely reclosing can be enabledfor different criteria, e.g.checking that the busbar orline is not carrying a voltage(dead line or dead bus).
Fuse-failure monitoringand other supervisionfunctions
The 7SA522 relay providescomprehensive monitoringfunctions covering both hard-ware and software. Further-more, the measured valuesare continuously checked forplausibility. Thus the currentand voltage transformers arealso included in this monito-ring system.
If any measured voltage isnot present due to short cir-cuit or conductor breakage inthe voltage transformer se-condary circuit the distanceprotection would react in anunwanted trip due to thisloss of voltage. This seconda-ry voltage interruption can bedetected by means of the in-tegrated Fuse-failure moni-tor. Immediate blocking of di-stance protection and swit-ching to the backup-emer-gency overcurrent protectionis provided for all types of se-condary voltage failures.
Additional measurement su-pervision functions are
• Balance of voltages and cur-rents
• Broken-conductor super-vision
• Summation of currents andvoltages
• Phase-sequence super-vision
Trip circuit supervision(ANSI 74TC)
One or two binary inputs foreach circuit breaker pole canbe used for monitoring thecircuit-breaker trip coils inclu-ding the connecting cables.An alarm signal is issuedwhenever the circuit is inter-rupted.
Lockout (ANSI 86)
A given tripping commandcan be held until it is resetvia a binary input. Therebythe circuit breaker can belocked to prevent restartinguntil the cause of the distur-bance is clarified. The lock-out state can be removed byconscious manual resetting.A prerequisite is that theclose coil — as usual — atthe circuit breaker is lockedwith pending tripping com-mand.
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
Functions
16 Siemens SIP 4.2 · 08/99
Region-specific defaultsettings
The SIPROTEC 4 relays7SA522 can be supplied inregional versions. The userpurchases only the functionsrequired. The available functi-ons are matched to the tech-nical requirements of the re-gions (see table).
Function Region World Region US Region GE
Frequency
50 Hz/60 Hz
preset to 50 Hz preset to 60 Hz preset to 50 Hz
Line lengthkm/miles
preset to km preset to miles preset to km
Inverse-time characteristicfor backup overcurrent
IEC, ANSI1)
preset to IEC
ANSI1) IEC
Inverse-time characteristicfor ground (earth) overcur-rent
IEC, ANSI1),Logarithmic inverse
preset to IEC
ANSI1) IEC
STUB-Bus overcurrent stage –
Operational measured values are clearlyarranged on the LCD display
Some fault indications are displayedautomtically on the LCD display
Measured values
The RMS values arecalculated from the acquiredcurrent and voltage signalsalong with the power factor,the frequency, the real andreactive power. Measuredvalues are displayed as pri-mary or secondary values orin percent of the specific linenominal current and voltage.The following values areavailable for measured valueprocessing:
• Currents 3x Iphase, 3I0 , IG,3I0par
• Voltages 3x Vphase-ground, 3xVphase-phase, 3V0, Ven, Vsync
• Symmetrical componentsI1, I2, V1, V2
• Real power P (Watt),Reactive power Q (Var),Apparent power S (VA)
• Power factor PF (= cosϕ)• Frequency f• Load (in service) impedan-
ces, primary and secondary3x (Rphase-ground, Xphase-ground),3x (Rphase-phase, Xphase-phase)
• Limit-value monitoringLimit values are monitoredby means of the CFC. Com-mands can be derived fromthis limit value indication.
Commissioning and testfunctions
Special attention has beenpaid to commissioning. All bi-nary inputs and outputs canbe displayed and set directly.This can simplify the wiringcheck process significantlyfor the user.
The measured values can bedisplayed via DIGSI 4 on thePC screen as primary, secon-dary and/or percentage valu-es simultaneously. This pro-vides a complete overview ofthe actual system conditions.
• The 7SA522 provides a cir-cuit breaker test function.Single- and three pole tripp-ing commands can be gene-rated manually followed bya reclosing command. Thepole open time can be setseparately to the auto reclo-sing dead time.
4 predefined settinggroups
The settings of the 7SA522relay can be adapted quicklyto suit changing networkconfigurations. The relayincludes 4 setting groupswhich can be predefinedduring commissioning oreven changed by remote viaa DIGSI 4 modem link. Thesetting groups can beactivated via binary inputs,via DIGSI 4 (local or remote),via the integrated keypad orvia the serial substationcontrol interface.
1) Disc-emulation with inverse time characteristic is generally combined with ANSI curves
Siemens SIP 4.2 · 08/99 17
Chatter disable
The chatter disable featureevaluates whether the num-ber of status changes of anindication input exceeds aspecified figure in a configu-red period of time. If so, theindication input is blocked fora certain period, so that theevent list will not record ex-cessive operations.
Filter time
All binary control indicationscan be subjected to a filtertime (indication delay) toprevent spurious operation.
Indication filtering anddelay
Indications can be filtered ordelayed. Filtering serves tosuppress brief changes atthe indication input. The indi-cation is passed on only ifthe indication voltage is stillpresent after a set period oftime. In the case of indicationdelay, there is a delay for apreset time. The informationis passed on only if the indi-cation voltage is still presentafter this time.
Indication derivation
A further indication (or acommand) can be derivedfrom an existing indication.Group indications can also beformed. The volume of infor-mation to the system inter-face can thus be reduced andrestricted to the most impor-tant signals.
Data transmission lockout
A data transmission lockoutcan be activated, so as toprevent transfer of informa-tion to the control centerduring work on a circuit bay.
Test mode
During commissioning a testmode can be selected; allindications then have a testmode suffix for transmissionto the control system.
Control
In addition to the protectionfunctions, the SIPROTEC 4units also support all controland monitoring functions re-quired for operating medium-voltage or high-voltage sub-stations. The main applica-tion is reliable control ofswitching and other proces-ses. The status of primaryequipment or auxiliary de-vices can be obtained fromauxiliary contacts and com-municated to the 7SA522 viabinary inputs. Therefore it ispossible to detect and indi-cate both the OPEN andCLOSED position or a faultyor intermediate circuit-brea-ker or auxiliary contact posi-tion. The switchgear or cir-cuit-breaker can be controlledvia:
− integrated operator panel
− binary inputs
− substation control system
− DIGSI 4.
Automation
With the integrated logic, theuser can set specific func-tions for the automation ofthe switchgear or substationby means of a graphic inter-face (CFC). Functions are ac-tivated by means of functionkeys, binary inputs or via thecommunication interface.
Switching authority
The following hierarchy ofswitching authority is appli-cable: ”LOCAL”, DIGSI 4 PCprogram, ”REMOTE”. Theswitching authority is deter-mined according to parame-ters or by DIGSI 4. If the”LOCAL” mode is selected,only local switching opera-tions are possible. Everyswitching operation andchange of breaker position isstored in the status indicationmemory. The switch
command source, switchingdevice, cause (i.e. spontane-ous change or command)and result of a switchingoperation are retained.
Command processing
The 7SA522 offers all func-tions required for commandprocessing, including theprocessing of single anddouble commands with orwithout feedback as well assophisticated monitoring ofthe control hardware andsoftware. Control actionsusing functions such as run-time monitoring and auto-matic command terminationafter output check of the ex-ternal process are also pro-vided by 7SA522. Typicalapplications are:
• Single and double com-mands using 1, 1 plus 1common or 2 trip contacts
• User-definable bay inter-locks
• Operating sequences com-bining several switchingoperations such as controlof circuit-breakers, isolators(disconnector switches) andearthing switches
• Derived triggering of switch-ing operations, indicationsor alarms by logical combi-nation of existing informa-tion.
Assignment of commandfeedback
The positions of the circuit-breaker or switching devicesare captured by feedback.These indication inputs arelogically assigned to the cor-responding command out-puts. The unit can thereforedistinguish whether the in-dication changes as a conse-quence of switching opera-tion or due to a spontaneouschange of state (intermediateposition).
Control and automatic functions
Figure 25
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
18 Siemens SIP 4.2 · 08/99
Q1
Q3
Q5
Q7
Q2
Q4
Q6
Q8
R15
R16
R17
R18
R13
R14
I4
V4
Flush mounting
52Circuitbreaker
VN
Line
A (L1)
B (L2)
C (L3)
Busbar
IN
IA(L1)
IB(L2)
IC(L3)
VA(L1)
VB(L2)
VC(L3)
Typical connection ofcurrent and voltagetransformers
The typical AC connection has3 phase current transformersand 3 phase-ground (earth)voltage transformers. Theneutral (residual) current (IN =3I0) is measured via the I4-current transformer as thesum of the three phase cur-rents.The zero sequence voltage3V0 is not measured exter-nally but calculated by themicroprocessor.
Typical connections
Voltage transformer con-nections: Separate opendelta transformer
The three phase-to-ground(earth) voltage transformersare typically connected as il-lustrated. The V4 voltagetransformer measures thezero sequence voltage 3V0(Ven) via a separate VT (opendelta connection). This ensu-res an additional voltage su-pervision.The V4 transformer can alsobe connected to a separatevoltage transformer for freeassignable voltage measure-ment (Vx).
Figure 27
Figure 26
R15
R16
R17
R18
R13
R14
VA(L1)
VB(L2)
VC(L3)
V4
52Circuit
breaker
Line
A (L1)
B (L2)
C (L3)
Busbar
Siemens SIP 4.2 · 08/99 19
VT connection to thebusbar
The three phase-to-ground(earth) voltage transformersare connected typically. TheV4 voltage transformer is con-nected to a busbar VT for syn-chronism check and/or volta-ge-supervised automatic re-closing. Any phase-to-phaseor phase-to-ground (earth) vol-tage can be used for busbarvoltage sensing.
Typical connections
Mutual parallel linecompensation
The three-phase current trans-formers are typically connec-ted as illustrated. The I4-CT isconnected to the neutral (resi-dual) current of the parallelline for mutual parallel linecompensation.
Figure 29
Figure 28
Q1
Q3
Q5
Q7
Q2
Q4
Q6
Q8
IA(L1)
IB(L2)
IC(L3)
A (L1)
B (L2)
C (L3)
52Circuitbreaker
Line
Busbar
52Circuitbreaker
Parallel line
I4
R15
R16
R17
R18
R13
R14
52Circuitbreaker
Line
Busbar
VA(L1)
VB(L2)
VC(L3)
A (L1)
B (L2)
C (L3)
V4
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
20 Siemens SIP 4.2 · 08/99
Additional polarizing fordirectional ground- (earth)fault protection
The three-phase current trans-formers are typically connec-ted as illustrated. The I4-CT isconnected as polarizing cur-rent to a grounded (earthed)power transformer. Thisensures dual polarization forthe directional ground- (earth)fault protection(ANSI 67N).
Typical connections
Separate neutral (residual)current measurement
The three-phase current trans-formers are connected typi-cally. The starpoint points inline direction. The I4-CT isconnected to a separate neu-tral (residual) current CT, thuspermitting a high sensitive 3I0measurement for high resi-stance ground (earth) faults.
Note: Terminal Q7 must beconnected to that CT terminalpointing in the same directionas the starpoint of the phasecurrent CTs.
Figure 31
Figure 30
Q1
Q3
Q5
Q7
Q2
Q4
Q6
Q8 I4
52Circuitbreaker
Busbar
Flux balancing or
other neutral CT
IA(L1)
IB(L2)
IC(L3)
A (L1)
B (L2)
C (L3)
Q1
Q3
Q5
Q7
Q2
Q4
Q6
Q8
A (L1)
B (L2)
C (L3)
IA(L1)
IB(L2)
IC(L3)
I4
52Circuitbreaker
Busbar
Siemens SIP 4.2 · 08/99 21
Technical Device Data
Rated frequency 50Hz or 60Hz (selectable)
Rated current Inom 1 A or 5 A (selectable)
Rated voltage 80 V to 125 V (selectable)
Power consumptionin CT circuits with Inom = 1A approx. 0.05 VAin CT circuits with Inom = 5A approx. 0.30 VAin the CT circuit for high sensitive ground (earth)fault protection (refer to ordering code) at 1A approx. 0.05 VAin VT circuits approx. 0.1VA
Thermal overload capabilityin CT circuits 100 x INom for 1 s
30 x INom for 10 s4 x INom continuous
in the CT circuit for high sensitive ground (earth) 300 A for 1 sfault protection (refer to ordering code) 100 A for 10 s
15 A continuous
in VT circuits 230 V continuous per phase
Dynamic overload capabilityin CT circuits 250 x INom (one half cycle)in the CT circuit for high sensitive earth faultprotection (refer to ordering code)
Rated auxiliary voltage 24 V to 48 V DC60 V to 125 V DC110 V to 250 V DCand 115 V AC with 50 Hz / 60 Hz
Permitted tolerance of the rated auxiliary voltage -20% to +20%
Max. superimposed AC voltage (peak to peak) ≤ 15%
Power consumptionduring normal operation approx. 8 Wduring pickup with all inputs and outputs activated approx. 18 W
Bridging time during auxiliary voltage failureVaux ≥ 110 V ≥ 50 ms
Quantity 8 or 16 or 24 (refer to ordering code)Function can be assigned
Minimum operating voltage 17 V or 73 V or 154 V DC, bipolarRange is selectable with jumpers for each (3 operating ranges)binary input
Maximum operating voltage 300 V DC
Current consumption, energized approx. 1.8 mA
Quantity 8 or 16 or 24 (refer to ordering code)Function can be assigned
Switching capacitymake 1000 W / VAbreak 30 VAbreak (for resistive load) 40 Wbreak (for τ = L/R ≤ 50 ms) 25 VA
Switching voltage 250 V
Permissible current 30 A for 0.5 s5 A continuous
Quantity
RUN (green) 1ERROR (red) 1Indication (red), function can be assigned 14
Analog input circuits
Power Supply
Output contacts
Binary Inputs
LED displays
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
22 Siemens SIP 4.2 · 08/99
Housing 7XP20
Dimension 1/2 x 19’‘ or 1/1 x 19’‘refer to ordering code and see dimension drawings
Degree of protection to EN 60 529For the front of the housing IP 51For the rear of the housing
flush mounting version IP 50surface mounting version IP 51
For the terminals IP 2x with terminal cover put on
WeightFlush mounting
1/2 x 19‘’ 6 kg1/1 x 19’‘ 10 kg
Surface mounting1/2 x 19‘’ 11 kg1/1 x 19’‘ 19 kg
Operating interface 1 for DIGSI 4
Connection non isolated, RS 232,front panel, 9-pin subminiature connector
Baud rate 4800 Baud to 115200 Baud
Time synchronization with IRIG-B signal / DCF77 / SCADA or binary inputimpulse
Connection 9-pin subminiature connector
Voltage levels 5 V or 12 V or 24 V
Service interface (refer to ordering code) for DIGSI 4 / Modem / Service(Operating interface 2) Isolated RS232/RS485 9-pin subminiature connector
Dielectric test 500 V/ 50 HzDistance for RS232 max. 15 mDistance for RS485 max. 1000 m
Fiber-optic integrated ST-connectorOptical wavelength λ = 820 nmPermissible attenuation max. 8dB for glass-fiber 62.5/125µmDistance max. 1.5 km
System interface (refer to ordering code) IEC60870-5-103
Profibus FMS (*)Profibus DP (*)
Modbus RTU (*)DNP 3.0 (*)
Isolated RS232/RS485 9-pin subminiature connectorBaud rate 4800 Baud to 38400 BaudDielectric test 500 V / 50 HZDistance for RS232 max. 15 mDistance for RS485 max. 1000m
Profibus RS485Dielectric test 500 V / 50 HzBaud rate max. 12 MBaudDistance 1000 m at 93.75 kBaud; 100 m at 12MBaud
Fiber-optic integrated ST-connectorsingle or double ring
Baud rate max. 1.5 MbaudOptical wavelength λ = 820nmPermissible attenuation max. 8dB for glass-fiber 62.5/125µmDistance max. 1.5 km
Remote Relay interfaces Quantity max. 2 (**)
Mechanical construction
Serial interface / front of unit
Technical Device Data
Serial interfaces / rear of unit
*) available with next firmware release**) in preparation
Siemens SIP 4.2 · 08/99 23
Standards IEC 60255 (product standards)
ANSI/IEEE C37.90.0/.1/.2
UL 508
For further regulations see “Individual functions”
Insulating tests
Standards IEC 60255-5
Voltage test (100% test)
All circuits except for auxiliary supply, binary inputs 2,5 kV (rms.), 50Hz / 60 Hzand communication interfaces
Auxiliary voltage and binary inputs (100% test) 3,5 kV DC
RS485/RS232 rear side communication interfacesand time synchronization interface (100% test) 500 V (rms.), 50 Hz / 60 Hz
Surge voltage test (type test)All circuits except for communication interfaces 5 kV (peak); 1.2/50 µs; 0.5 Jand time synchronization interface, class III 3 positive and 3 negative surges at intervals of 5 s
EMC tests for noise immunity
Standards IEC 60255-6, 60255-22 (Product standards)EN 50082-2 (Basic specification)
(Type tests) DIN 57 435 part 303
High frequency test 2.5 kV (peak); 1 MHz; τ = 15 ms; 400 surges per s;IEC 60255-22-1, class III and DIN 57 435 test duration 2 spart 303, class III
Discharge of static electricity 8 kV contact discharge; 15 kV air discharge; bothIEC 60255-22-2 class IV polarities; 150 pF; R j = 330 ΩEN 61000-4-2, class IV
Exposure to RF field, non modulated 10 V/m; 27 MHz to 500 MHzIEC 60255-22-3 (report) class III
Exposure to RF field, amplitude-modulated 10 V/m; 80 MHz to 1000 MHz; 80% AM; 1 kHzIEC 61000-4-3, class III
Exposure to RF field, pulse-modulated 10 V/m; 900 Mhz; repetition frequency 200 Hz;IEC 61000-4-3/ ENV 50204, class III duty cycle 50 %
Fast transients, Bursts 4 kV; 5/50 ns; 5 kHz; burst length = 15 ms;IEC 60255-22-4 and repetition frequency 300 ms; both polarities;IEC 61000-4-4, class IV Rj = 50 Ω; test duration 1 min
High-energy surge voltages (SURGE),IEC 61000-4-5 installation class IIIAuxiliary supply common (longitudinal) mode: 2kV; 12Ω, 9µF
differential(transversal) mode: 1kV; 2Ω, 18µF
Measurements inputs, binary inputs, binary outputs common (longitude) mode: 2kV; 42Ω,0.5µFdifferential(transversal) mode: 1kV; 42Ω, 0.5µF
Conducted RF, amplitude-modulated 10 V; 150 kHz to 80 Mhz; 80 % AM; 1kHzIEC 61000-4-6, class III
Magnetic field with power frequency 30 A/m continuous;IEC 61000-4-8, class IV 300 A/m for 3 s; 50 HzIEC 60255-6 0.5 mT; 50 Hz
Oscillatory Surge Withstand Capability 2,5 to 3 kV (peak); 1 to 1,5 MhzANSI/IEEE C37.90.1 damped wave; 50 surges per second;
Duration 2 s; Ri = 150Ω to 200ΩFast Transient Surge Withstand Capability 4 kV to 5 kV; 10/150 ns; 50 impulses per second;
ANSI/IEEE C37.90.1 both polarities; Duration 2 s ; Rj = 80 ΩRadiated Electromagnetic Interference 35 V/m; 25 MHz to 1000 Mhz
IEEE C37.90.2
Damped oscillations 2.5 kV (peak value), polarity alternating 100 kHz,IEC 60894, IEC 61000-4-12 1 Mhz, 10 Mhz and 50 Mhz, Rj = 200Ω
EMC tests for interference emission
(Type test)
Standard EN 50081-1 (Basic specification)
Radio interference voltage on lines, 150kHz to 30 Mhzonly auxiliary supply class BIEC-CISPR 22
Interference field strenght 30 Mhz to 1000 MHZIEC-CISPR 22 class B
Technical Device Data
Electrical tests
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
24 Siemens SIP 4.2 · 08/99
Vibration, shock stress and vibrationduring earthquake
Standards IEC 60255-21 and IEC 60068-2
Vibration sinusoidalIEC 60255-21-1, class 2 10 Hz to 60 Hz: ±0.075 mm amplitude;IEC 60068-2-6 60 Hz to 150 Hz: 1 g acceleration
frequency sweep 1 octave/min20 cycles in 3 othogonal axes
Shock half-sinusoidalIEC 60255-21-2, class 1 acceleration 5 g, duration 11 ms, 3 shocks each inIEC 60068-2-27 both directions of the 3 axes
Vibration during earthquake sinusoidalIEC 60255-21-2, class 1 1 Hz to 8 Hz:±3,5 mm amplitude (horizontal axis)IEC 60068-3-3 1 Hz to 8 Hz:±1.5 mm amplitude (vertical axis)
8 Hz to 35 Hz: 1g acceleration (horizontal axis)8 Hz to 35 Hz: 0.5 g acceleration (vertical axis)frequency sweep 1 octave/min1 cycle in 3 orthogonal axes
Vibration and shock stressduring transport
Standards IEC 60255-21 and IEC 60068-2
Vibration sinusoidalIEC 60255-21-1, class 2 5 Hz to 8 Hz:±7.5 mm amplitude;IEC 60255-2-6 8 Hz to 150 Hz: 2 g acceleration
frequency sweep 1 octave/min20 cycles in 3 orthogonal axes
Shock half-sinusoidalIEC 60255-21-2, class 1 acceleration 15 g, duration 11 ms, 3 shocks eachIEC 60068-2-27 in both directions of the 3 axes
Repetitive shock half-sinusoidalIEC 60255-21-2, class 1 acceleration 10 g, duration 16 ms, 1000 shocksIEC 60068-2-29 each in both directions of the 3 axes
Temperatures
Temperature during service -5°C to +55°C
Temporary permissible temperature limit during service -20°C to +70 °C(The legibility of the display may be affectedabove 55°C)
Temperature limit during storage -25°C to +55°C
Temperature limit during transport -25°C to +70°C(Storage and transport with standard factory packaging)
Humidity
Permissible humidity stress yearly average ≤ 75% relative humidity; on 56 daysin the year up to 93% relative humidity; moisturecondensation during operation is not permitted
This product is in conformity with the directive of the Conformity is proved by tests that had beenCouncil of the European Communities on the performed according to Article 10 of theapproximation of the laws of the member states Council Directive in accordance with therelating to electromagnetic compatibility generic standards EN 50081 and EN 50082(EMC Council Directive 89/336/EEC) and concerning (for EMC directive) and the standards EN 60255-6electrical equipment for application within specified (for low-voltage directive) by Siemens AG.voltage limits (low-voltage directive 73/23 EEC).
The device is designed in accordance with theinternational standards of IEC 60255.
Further applicable standards:ANSI/IEEE C37.90.0 and C37.90.1
Mechanical dynamic tests
Climatic stress tests
CE conformity
Technical Device Data
Siemens SIP 4.2 · 08/99 25
Distance zones 6, 1 as extended (overreach) zoneall zones may be set forward or/and reverseor ineffective
Time stages 6 for multi-phase faults3 for single-phase faults
Characteristic (refer to ordering code)selectable seperately for phase and quadrilateral and/orground (earth) faults MHO
Time range 0.00 to 30 s (step 0.01s) or deactivated
Line angle ϕL 30° to 89° (step 1°)Quadrilateral reactance reach X 0.05Ω to 250Ω (1A) / 0.01Ω to 50Ω (5A)
(step 0.01Ω)Quadrilateral resistance reach R
for phase-to-phase faults and 0.05Ω to 250Ω (1A) / 0.01Ω to 50Ω (5A)
phase-to-ground (earth) faults (step 0.01Ω)
MHO impedance reach ZR 0.05Ω to 200Ω (1A) / 0.01Ω to 40Ω (5A)
(step 0.01Ω)
Minimum phase current I 0.10A to 4A (1A) / 0.50A to 20A (5A)
(step 0.01A)
Ground- (Earth-) fault pickupNeutral (residual) current 3 I0 0.05A to 4A (1A) / 0.25A to 20A (5A)
(step 0.01A)
Zero sequence voltage 3V0 1 to 100V (step 1V) or deactivated
Zero sequence compensationselectable input formats RG/RL and XG/XL
k0 and ϕ (k0)
Seperately selectable for zones Z1higher zones
RG/RL and XG/XL - 0.33 to 7 (step 0.01)
k0 0 to 4 (step 0.001)ϕ (k0 ) -135° to 135°Parallel line mutual compensation (refer to ordering code)RM/RL and XM/XL 0.00 to 8 (step 0.01)
Load encroachmentMinimum load resistance 0.10Ω to 250Ω (1A) / 0.02Ω to 50Ω (5A)
(step 0.01Ω) or deactivatedMaximum load angle 20° to 60° (step 1°)Directional decision for all types of faults with sound phase polarization and/or voltage
memory
Directional sensitivity dynamically unlimited
Tolerances for sinusodial quantities
∆X
X≤ 5% for 30° ≤ ϕ scc ≤ 90°
∆R
R≤ 5% for 0° ≤ ϕ scc ≤ 60°
∆Z
Z≤ 5% for -30° ≤ (ϕ scc − ϕ line) ≤+30°
Timer tolerance ± 1% of set value or 10ms
Operating times
Minimum trip time approx. 17ms at 50Hzapprox. 15ms at 60Hz
Reset time approx. 30ms
Output of the distance to fault X, R (secondary) in ΩX, R (primary) in Ωdistance in kilometers or milesdistance in % of line length
Start of calculation with trip, with pickup reset
Reactance per unit length 0.005 to 6.5Ω / km (1A) / 0.001 to 1.3Ω / km (5A) or0.005 to 10Ω / mile (1A) / 0.001 to 2Ω / mile (5A)
(step 0.001Ω / unit)
Tolerance for sinusodial quantities≤ 2.5% line length for 30° ≤ϕ scc ≤ 90° andVscc/VN > 0.10
Distance protection – ANSI 21, 21N
Technical Function Data
Fault locator
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
26 Siemens SIP 4.2 · 08/99
Power swing detection principle measurement of the rate of impedance vectorchange and scanning of the vector course
Max. detectable power swing frequency approx. 7 Hz
Operating modes power swing blocking and/orpower swing tripping (out of step tripping)
Power swing blocking programs all zones blockedZ1/Z1B blockedZ2 to Z5 blockedZ1, Z1B, Z2 blocked
Detection of faults during power swing blocking stop power swing blocking for all types of faults
Operating modes POTTPUTT, DUTTdirectional comparison Blockingdirectional comparison Unblockingdirectional comparison hybrid (POTT and echowith Weak Infeed protection)
Transient blocking logic for overreaching schemes(current reversal guard)
Send and receive signals suitable for 2- and 3- terminal linesphase segregated signals for selective single phasetripping selectable
Trip time delay 0.00 to 30s (step 0.01s) or deactivated
Timer tolerance ± 1% of set value or 10ms
Characteristic 3 definite time stages / 1 inverse time stage or4 definite time stages
Inrush restraint Selectable for every stage
Instantaneous trip after switch-onto-fault Selectable for every stage
Influence of harmonics
Stages 1 and 2 3rd and higher harmonics are completelysuppressed by digital filtering
Stages 3 and 4 2nd and higher harmonics are completelysuppressed by digital filtering
Definite time ground (earth) Pickup definite time stage 1, 3I0 0.5A to 25A (1A) / 2.5A to 125A (5A)
overcurrent protection (step 0.01A)
ANSI 50N Pickup definite time stage 2, 3I0 0.2A to 25A (1A) / 1A to 125A (5A)
(step 0.01A)
Pickup definite time stage 3, 3I0 0.05A to 25A (1A) / 0.25A to 125A (5A)(step 0.01A)with normal neutral (residual) current CT(refer to ordering code)
0.003A to 25A (1A) / 0.015A to 125A (5A)(step 0.01A)with high sensitive neutral (residual) current CT(refer to ordering code)
Pickup definite time stage 4, 3I0 0.05A to 4A (1A) / 0.25A to 20A (5A)(step 0.01A)with normal neutral (residual) current CT(refer to ordering code)
0.003A to 4A (1A) / 0.015A to 20A (5A)(step 0.01A)with high sensitive neutral (residual) current CT(refer to ordering code)
Time delay for definite time stages 0.00 to 30s (step 0.01s) or deactivated
TolerancesCurrent starting ≤ 3% of set value or 1% of Inom
Delay times ± 1% of set value or 10ms
Pickup timesDefinite time stages 1 and 2 approx. 30msDefinite time stages 3 and 4 approx. 40ms
Pilot- (Tele-) protection for distance protection – ANSI 85-21
Ground- (Earth-) fault overcurrent protection – ANSI 50N, 51N, 67N
Technical Function Data
Power swing detection – ANSI 68, 68T
Direct transfer trip
Siemens SIP 4.2 · 08/99 27
Inverse time ground (earth) Current starting 3I0 0.05A to 4A (1A) / 0.25A to 20A (5A)
overcurrent protection (step 0.01A)ANSI 51N with normal neutral (residual) current CT
(refer to ordering code)
0.003A to 4A (1A) / 0.015A to 20A (5A)
(step 0.01A)with high sensitive neutral (residual) current CT(refer to ordering code)
Tripping time characteristics Characteristics normal inverseaccording to IEC 60255-3 very inverse
extremely inverselong time inverse
Time multiplier Tp = 0.05 to 3s (step 0.01s) or deactivated
Pickup threshold approx. 1.1 x I/IpReset threshold approx. 1.05 x I/Ip
Tolerances
Operating time for 2 ≤ I/Ip ≤ 20 ≤ 5% of setpoint ± 15ms
Tripping time characteristics Characteristics inverseaccording to ANSI/IEEE short inverse
long inversemoderately inversevery inverseextremely inversedefinite inverse
Time dial 0.50 to 15 (step 0.01) or deactivated
Pickup threshold approx. 1.1 x M
Reset threshold approx. 1.05 x M
TolerancesOperating time for 2 ≤ Μ ≤ 20 ≤ 5% of setpoint ± 15ms
Tripping time according toLogarithmic inverse characteristic
Characteristic t[s] = T3I0p max - T3I0p ⋅ ln 3
3
0
0
I
I p
Pickup threshold 1.1 to 4.0 x I/Ip (step 0.1)
Directional decision Polarizing quantities for directional decision 3 I0 and 3V0 orANSI 67N 3 I0 and 3V0 and Ig (grounded power transformer) or
3 I2 and 3V2 (negative sequece)
Zero sequence voltage 3V0 0.5 to 10V (step 0.1V)
Ground current Ig of grounded power transformer 0.05A to 1A (1A) / 0.25A to 5A (5A) (step 0.01A)
Negative sequence voltage 3V2 0.5 to 10V (step 0.1V)
Negative sequence current 3I2 0.05A to 1A (1A) / 0.25A to 5A (5A) (step 0.01A)
Inrush restraint 2ndharmonic ratio 10 to 45% of fundamental (step 1%)
Maximum current, overriding inrush restraint 0.5A to 25A (1A) / 2.5A to 125A (5A) (step 0.01A)
Technical Function Data
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
28 Siemens SIP 4.2 · 08/99
Operating modes directional comparison Pickupdirectional comparison Blockingdirectional comparison Unblocking
Transient blocking logic for schemes with parallel lines
Send and receive signals suitable for 2- and 3- terminal lines
Operating modes with carrier (signal) reception echoecho and trip with undervoltage
Undervoltage phase-ground (-earth) 2V to 70V (step 1V)
Time delay 0.00s to 30s (step 0.01s)
Echo impulse 0.00s to 30s (step 0.01s)
Tolerances
Voltage threshold ≤ 5% of set value or 0.5V
Timer ± 1% of set value or 10ms
Operating modes active only with loss of VT secondary circuitalways active
Characteristic 2 definite time stages / 1 inverse time stage
Instantaneous trip after switch-onto-fault selectable for every stage
Definite time overcurrent Pickup definite time stage 1, phase current 0.1A to 25A (1A) / 0.5A to 125A (5A)
protection (step 0.01A)
ANSI 50, 50N Pickup definite time stage 1, neutral (residual) 0.05A to 25A (1A) / 0.25A to 125A (5A)current (step 0.01A)
Pickup definite time stage 2, phase current 0.1A to 25A (1A) / 0.5A to 125A (5A)
(step 0.01A)
Pickup definite time stage 2, neutral (residual) 0.05A to 25A (1A) / 0.25A to 125A (5A)
current (step 0.01A)
Time delay for definite time stages 0.00 to 30s (step 0.01s) or deactivated
Tolerances
Current starting ≤ 3% of set value or 1% of Inom
Delay times ± 1% of set value or 10ms
Operating time approx. 25ms
Inverse time overcurrent Phase current starting 0.1A to 4A (1A) / 0.5A to 20A (5A)
protection (step 0.01A)
ANSI 51, 51N Neutral (residual) current starting 0.05A to 4A (1A) / 0.5A to 20A (5A)
(step 0.01A)
Tripping time characteristics Characteristics normal inverseaccording to IEC 60255-3 very inverse
extremely inverselong time inverse
Time multiplier Tp = 0.05 to 3s (step 0.01s) or deactivated
Pickup threshold approx. 1.1 x I/Ip
Reset threshold approx. 1.05 x I/IpTolerances
Operating time for 2 ≤ I/Ip ≤20 ≤ 5% of setpoint ±15ms
Technical Function Data
Pilot-(Tele-) protection for directional ground-(earth-) fault overcurrent protection – ANSI 85-67N
Weak Infeed protection with undervoltage – ANSI 27WI
Backup overcurrent protection – ANSI 50(N), 51(N)
Siemens SIP 4.2 · 08/99 29
Tripping time characteristics Characteristics inverseaccording to ANSI/IEEE short inverse
long inversemoderately inversevery inverseextremely inversedefinite inverse
Time dial 0.50 to 15 (step 0.01) or deactivated
Pickup threshold approx. 1.1 x M
Reset threshold approx. 1.05 x M
Tolerances
Operating time for 2 ≤ M ≤ 20 ≤ 5% of setpoint ±15ms
Operating modes active only with open isolator position(signalled via binary input)
Characteristic 1 definite time stage
Instantaneous trip after switch-onto-fault selectable
Pickup phase current 0.1A to 25A (1A) / 0.5A to 125A (5A)
(step 0.01A)
Pickup neutral (residual) current 0.05A to 25A (1A) / 0.25 to 125A (5A)
(step 0.01A)
Time delay, separate for phase and 0.00 to 30s (step 0.01s) or deactivatedground (earth) stage
Reset ratio approx. 0.95
Tolerances
Current starting ≤ 3% of set value or 1% of Inom
Delay times ± 1% of set value or 10ms
Operating mode active only after CB closing; instantaneoustrip after pickup
Pickup current 1A to 25A (1A) / 5A to 125A (5A)
(step 0.01A)
Reset ratio approx. 0.95
Tolerances
Current starting ≤ 3% of set value or 1% of Inom
Operating time approx. 13ms
Measured quantities 3 phase-ground (-earth) voltages andzero sequence voltage 3V0
(zero sequence voltage can be measured viaseparate VT or can be calculated internally)
Operating modes local trip and/orcarrier trip impulse for remote end trip
Pickup phase-ground (-earth) voltage 1V to 170V (step 0.1V)
Pickup zero sequence voltage 3V0 1V to 300V (step 0.1V)
Trip time delay, separate for phase-ground 0.00 to 30s (step 0.01s) or deactivated(-earth) and zero sequence voltage
Carrier send impulse 0.05s to 0.5s (step 0.01s)
Reset ratio 0.95
Tolerances
Pickup ≤ 3% of set value or 1V
Timers ± 1% of set value or 10ms
Operating time
phase-ground (earth) voltage approx. 30mszero sequence voltage approx. 65ms
STUB bus overcurrent protection – ANSI 50(N)-STUB
Instantaneous high speed switch-onto-fault overcurrent protection – ANSI 50HS
Overvoltage protection – ANSI 59
Technical Function Data
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
30 Siemens SIP 4.2 · 08/99
Technical Function Data
Number of stages 2
Current start 0.1A to 4A (1A) / 0.5A to 20A (5A) (step 0.01A)
Delay time 0.05 to 1s (step 0.01s)
Shortest release time approx. 10ms
Timer tolerance ± 1% of setting value or 10ms
Number of automatic reclosures up to 8
Program only 1-poleonly 3-pole1 or 3-pole
Voltage check discrimination between successful andnon-successful reclose attempts
Action times 0.01 to 30 s (step 0.01s)
Dead times 0.01 to 1800 s (step 0.01s)
Reclaim times 0.5 to 30 s (step 0.01s)
CLOSE command duration 0.01 to 30 s (step 0.01s)
Timer tolerance ± 1% of setting value or 10ms
Operating modes
Line dead / busbar dead V1< / V2<
Line dead / busbar live V1< / V2>
Line live / busbar dead V1> / V2<
Synchronism V1> / V2>
Permissible voltage difference 1 to 50 V (step 1V)
Permissible frequence difference 0.01 to 1 Hz (step 0.01 Hz)
Permissible angle difference 1 to 60° (step 1)
Supervision time 0.01 to 30 s (step 0.01s)
Automatic reclosure – ANSI 79
Synchronism check – ANSI 25
Breaker failure protection – ANSI 50BF
Siemens SIP 4.2 · 08/99 31
Currents primary, secondary and percent3 x Iphase
3 I0, I1, I2, IG, 3I0par
Tolerances10 to 50% Vnom typically ≤1% of 50% Vnom
50 to 200%Vnom typically ≤1% of measured value
Voltages primary, secondary and percent3 x Vphase-ground,3 x Vphase-phase
3V0, V1, V2, VSYNC, Ven
Tolerances10 to 50% Inom typically ≤1% of 50% Inom
50 to 200% Inom typically ≤1% of measured value
Power and direction of power flow primary and percentP, real power in WQ, reactive power in VarS, apparent power in VA
Frequency f
Power factor PF
Load impedances with direction primary and secondary3 x (Rphase-ground, X phase-ground)3 x (Rphase-phase, Xphase-phase)
TolerancesP: typically ≤ 3%for |cos ϕ| = 0.7 to 1 andV/Vnom, I/ Inom = 50 to 120%Q: typically ≤ 3%for |sin ϕ | = 0.7 to 1 andV/Vnom, I/Inom = 50 to 120%S: typically ≤ 2%for V/Vnom,I/Inom = 50 to 120%f: ≤ 20mHzPF: ≤ 3%for |cos ϕ| = 0.7 to 1
Measured analog channels 3 x Iphase, 3I0, 3 I0par3 x Vphase , 3V0, VSYNC, Ven
Binary channels pickup and trip information, other signals can befreely configured
Maximum number of available recordings 8
Sampling interval 20 samples per cycle
Storage time total of 5spre-event and post-event recording time andevent storage time settable
Measurement supervision current summationcurrent balancevoltage summationvoltage phase sequencefuse failure monitor
AnnunciationsEvent logging buffer length 200Fault logging storage of signals of the last 8 faults,
buffer length 200
Switching statistics phase segregated summation of circuitbreaker operationssummated tripping current per phasetripping current of the last trip
Circuit breaker test trip-/close-cycle 3phasetrip-/close-cycle per phase
Setting range
Dead time for CB trip-close-cycle 0.00 to 30s (step 0.01s)
Commissioning aids operational measured valuescircuit breaker testread binary inputsinitiate binary inputsset binary outputsset serial interface outputs
Additional functions
Oscillographic fault recording
Operational measured values
Technical Function Data
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
Selection and ordering data
––225A
Position 7 8 9 10 11 12 13 14 15 16
S7
*) available with next firmware release
32 Siemens SIP 4.2 · 08/99
Current transformer 7
Phase = 1A, Ground (Earth) = 1A (min. = 0.05A) 1
Phase = 1A, Ground (Earth) = high sensitive 1A (min. = 0.005A) 1) 2
Phase = 5A, Ground (Earth) = 5A (min. = 0.25A) 5
Phase = 5A, Ground (Earth) = high sensitive 5A (min. = 0.005A) 1) 6
1) Position 7 = 2 or position 7 = 6 is not available with Position 14 = K, M, N, Q
Auxiliary Voltage (Power supply, Binary indication voltage) 8
24V to 48V DC, binary input threshold 17V 2
60V to 125V, binary input threshold 17V 4
110V to 250V DC, 115 V AC, binary input threshold 73V 5
220V to 250V DC, 115V AC, binary input threshold 154V 6
Housing and quantity of binary inputs (BI) and outputs (BO) 9
1/2 x 19’‘, 8 BI, 16 BO, Flush-mounting housing with screw terminals A
1/1 x 19’‘, 16 BI, 24 BO, Flush-mounting housing with screw terminals C
1/1 x 19’‘, 24 BI, 32 BO, Flush-mounting housing with screw terminals D
1/2 x 19’‘, 8 BI, 16 BO, Surface-mounting housing with screw terminals 2) E
1/1 x 19’‘, 16 BI, 24 BO, Surface-mounting housing with screw terminals 2) G
1/1 x 19’‘, 24 BI, 32 BO, Surface-mounting housing with screw terminals 2) H
1/2 x 19’‘, 8 BI, 16 BO, Flush-mounting housing with plug-in terminals J
1/1 x 19’‘, 16 BI, 24 BO, Flush-mounting housing with plug-in terminals L
1/1 x 19’‘, 24 BI, 32 BO, Flush-mounting housing with plug-in terminals M
2) Position 11 = 5 or position 11 = 6 is not available with position 9 = E, G, H
Region and operating language 10
Region GE, language german A
Region World, language UK-english B
Region US, language US-english C
Other languages on request
System interface for substation control (on rear of device) 11
No system interface 0
IEC 60870-5-103, electrical RS232 1
IEC 60870-5-103, electrical RS485 2
IEC 60870-5-103, fiber optical 820 nm, ST-connector 3
PROFIBUS FMS Slave, electrical RS485 (*) 4
PROFIBUS FMS, optical fiber, single ring, ST-connector 2) (*) 5
PROFIBUS FMS, optical fiber, double ring, ST-connector 2) (*) 6
Other protocols on request
2) Position 11 = 5 or position 11 = 6 is not available with position 9 = E, G, H
Service interface (2nd operating interface) for DIGSI / Modem (on rear of device) 12
No 2nd operating interface 0
Electrical RS232 1
Electrical RS485 2
Optical fiber 820nm, ST-connector 3
With remote relay interface (in preparation)
Siemens SIP 4.2 · 08/99 33
Selection and ordering data
Position 13 14 15 16
Trip mode 13
Trip mode 3pole 0
Trip mode 1- and 3pole 4
Distance characteristic (ANSI 21, 21N), Power Swing (ANSI 68)Parallel Line Compensation 14
Quadrilateral without Power Swing without Parallel Line Comp. C
Quadrilateral and/or MHO without Power Swing without Parallel Line Comp. E
Quadrilateral with Power Swing without Parallel Line Comp.. F
Quadrilateral and/or MHO with Power Swing without Parallel Line Comp. H
Quadrilateral without Power Swing with Parallel Line Comp. 1) K
Quadrilateral and/or MHO without Power Swing with Parallel Line Comp. 1) M
Quadrilateral with Power Swing with Parallel Line Comp. 1) N
Quadrilateral and/or MHO with Power Swing with Parallel Line Comp. 1) Q
1) Position 7 = 2 or Position 7 = 6 is not available with Position 14 = K, M, N, Q
Autoreclosure (AR, ANSI 79), Synchrocheck (Sync., ANSI 25)Breaker Failure protection (BF, ANSI 50BF), Overvoltage protection (OV, ANSI 59) 15
Without AR without Sync. without BF without OV A
Without AR without Sync. without BF with OV B
Without AR without Sync. with BF without OV (*) C
Without AR without Sync. with BF with OV (*) D
Without AR with Sync. without BF without OV (*) E
Without AR with Sync. without BF with OV (*) F
Without AR with Sync. with BF without OV (*) G
Without AR with Sync. with BF with OV (*) H
With AR without Sync. without BF without OV (*) J
With AR without Sync. without BF with OV (*) K
With AR without Sync. with BF without OV (*) L
With AR without Sync. with BF with OV (*) M
With AR with Sync. without BF without OV (*) N
With AR with Sync. without BF with OV (*) P
With AR with Sync. with BF without OV (*) Q
With AR with Sync. with BF with OV (*) R
Ground (Earth) Fault Overcurrent protection (ANSI 50N, 51N, 67N) 16
Without 0
With 4
*) available with next firmware release
34 Siemens SIP 4.2 · 08/99
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
Accesories
Fig. 33
2-pin connectorFig. 34
3-pin connector
Fig. 35
Short circuit link for currentcontacts
Fig. 36
Short circuit link for voltage/signal contacts
Fig. 32
Mounting railfor 19”rack
Description Order No. Size ofpackage
Supplier Fig
Connector 2-pinConnector 3-pin
C73334-A1-C35-1C73334-A1-C36-1
11
SiemensSiemens
3334
Crimp connectorCI2 0.5-1 mm2
Crimp connectorCI2 0.5-1 mm2
Crimp connectorCI2 1-2.5 mm2
Crimp connectorCI2 1-2.5 mm2
Crimp connectorType III+ 0.75-1.5 mm2
Crimp connectorType III+ 0.75-1.5 mm2
827039-1
827396-1
827040-1
827397-1
163083-7
163084-2
4000taped on reel1
4000taped on reel1
4000taped on reel
1
AMP1)
AMP1)
AMP1)
AMP1)
AMP1)
AMP1)
Crimping tool for Typ III+Crimping tool for CI2
0-169422-10-825582-0
11
AMP1)
AMP1)
19”mounting rail C73165-A63-D200-1 Siemens 32
Short-circuiting links- for current terminals- all other terminalsTerminal cover- large- small
(included)C73334-A1-C33-1C73334-A1-C34-1
C73334-A1-C31-1C73334-A1-C32-1
11
11
SiemensSiemens
SiemensSiemens
3536
55
1) AMP Deutschland GmbHAmperesstr. 7-11D-63225 LangenPhone:: +49 6103 709-0Fax +49 6103 709-223
Please check with your localrepresentative for local supplier
Product Description Versions Order Number
DIGSI 4
Software for operation and usageof protection devices of Siemens
MS Windows program, running under MS Win-dows NT 4, MS Windows 95Including device templates, online manual
Professional
Complete version: Basis version and DIGRA 4, DIGSI REMOTE 4,SIMATIC CFC 4, Display Editor 4 and Graphic Tools 4 with licensefor 10 purchase. 1 copper connection cable included
Basis
Complete version with license for 10 PCs, 1 copper connectioncable included
Demo version
Functionality of Basis version without the availability ofcommunication with relays
7XS5402 – 0AA00
7XS5400 – 0AA00
7XS5401 – 0AA00
Copper connection cable between PC and relay(9-pin female to 9-pin male)
7XV5100-4
Two-channel binary signal transducer
The bidirectional transducer registers binaryinformation at two binary inputs and forwardsit via fibre-optic cable to a second transducer,which outputs the signals via contacts.Distances of about 3 km can be realized directlyvia multimode fibre-optic cables. The repeater7XV5451 is available for distances up to 14 kmvia monomode fibre-optic cable. Because of serialtransmission connection can also be made bystandby modem or a digital network via theasynchronous RS232 interface.
Plastic housing, for snap mount on 35 mm DIN EN 50022 rail
Auxiliary voltage supply DC 24 to 250V and AC110 to 220V withalarm relay
2 binary inputs, 2 trips,
1 alarm relay with potential free contactsConnector to a second transducer via fibre optic cable with820nm,
FSMA-plug to connect to the fibre-optic cable 62,5 µm/125 µmConnection to a second transducer via a communication systemwith a RS232 interface, 9-pole. SUB-D socket
7XV5653-0AA00
Instruction Manual 7SA522 V4.00, English C53000-G1176-C119
Instruction Manual 7SA522 V4.00, US English C53000-G1140-C119
7SA522 Advertising sheet English E50001-U321-A133-X-7600
SIPROTEC Overview sheet English E50001-U321-A118-X-7600
f = 60 Hz, SIR < 20
0
5
10
15
20
25
30
35
0 25 50 75 100
Fault location at % of Zone1 setting
Tri
pti
me
(ms)
1 cycle
f = 60 Hz, SIR ≤ 20
The figures 37 and 38 showthe tripping time curves forthe distance protection func-tion. These curves apply tolines with a Source Imped-ance Ratio (SIR) up to 20.The tripping time includesthe output contact closingtime.
The curves are based on aline with conventional VT’s,no pre-fault load and faultswithout fault resistance.
Trip time curves
Figure 37
Distance protection: typical trip time for ground faults at 50 Hz
Figure 38
Distance protection: typical trip time for ground faults at 60 Hz
Siemens SIP 4.2 · 08/99 35
f = 50 Hz, SIR < 20
0
5
10
15
20
25
30
35
0 25 50 75 100
Fault location at % of Zone1 setting
Tri
pti
me
(ms)
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
36 Siemens SIP 4.2 · 08/99
Connection diagrams according to IEC Standard
Live status contact
NC or NO with Jumper
=
=
(~)
IL1
IL2
IL3
I4
VL1
VL2
VL3
V4
Q1
Q3
Q5
Q7
Q2
Q4
Q6
Q8
SerialInterfaces
K1+
-K2
K3
K4
K5K6K7K8K9K10K11K12K13K14K15K16
R1R2R3R4R5R6R7R8R9R10R11R12BO 15
BO 14
BO 13
Fast BO1
Fast BO2
Fast BO3
Fast BO4
Fast BO5
Fast BO6
Fast BO7
BO8
BO9BO10
BO11
BO12
K17K18J1J2J3
J4J5J6
J7J8J9J10J11
BI 1
BI 2
BI 3
BI 4
BI 5
BI 6
BI 7
BI 8J12
R15
R16
R17
R18
R13
R14
Flush mounting
Surface mounting
25
50
24
49
23
48
22
47
20
45
19
44
21
46
4318421741
401439
381337123611
886387628661856084598358
749973989772967195709469
90
65
L+(15)
L-(16)
Figure 37
Housing 1/2 x 19’‘, Basic Version 7SA522*-*A, 7SA522*-*E and 7SA522*-*Jwith 8 Binary Inputs and 16 Binary Outputs
Front interface
System/Scadainterface
Service interfaceDIGSI, Modem
Timesynchronization
A
B
C
Figure 38
Serial interfaces
Siemens SIP 4.2 · 08/99 37
Connection diagrams according to IEC Standard
Live status contactNC or NO with Jumper
=
=(~)
IL1
IL2
IL3
I4
VL1
VL2
VL3
V4
Q1
Q3
Q5
Q7
Q2
Q4
Q6
Q8
Serial
Interfaces
K1+
-K2
K3
K4
K5K6K7K8K9K10K11K12K13K14K15K16
R1R2R3R4R5R6R7R8R9R10R11R12BO 15
BO 14
BO 13
P3P4
NC or NOwith Jumper
BO16
P5P6P7P8
BO 17
BO 18
BO 19
BO 20
BO 21
BO 22
BO 23
P9P10P11P12P13P14P15P16
Fast BO1
Fast BO2
Fast BO3
Fast BO4
Fast BO5
Fast BO6
Fast BO7
BO8
BO9BO10BO11
BO12
K17K18J1J2J3
J4J5J6
J7J8J9J10J11
BI 1
BI 2
BI 3
BI 4
BI 5
BI 6
BI 7
BI 8J12P17P18N1N2N3
N4N5N6
N7N8N9N10N11
BI 9
BI 10
BI 11
BI 12
BI 13
BI 14
BI 15
BI 16N12
R15
R16
R17
R18
R13
R14
Flush mounting
Surface mounting
50
100
49
99
48
9847
97
45
95
44
94
46
96
9040893986
368535
843483338232
173123172122171121170120169119168118
174
124
L+ (37)
L- (38)
7525742473
237222
712170206919
190140189139188
138
187137186136185135184134
149199148198197147196146195145194144
Figure 39
Housing 1/1 x 19’‘, Medium Version 7SA522*-*C, 7SA522*-*G and 7SA522*-*Lwith 16 Binary Inputs and 24 Binary Outputs
Note: for serial interfaces see Figure 38
38 Siemens SIP 4.2 · 08/99
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
Connection diagrams according to IEC Standard
Live status contactNC or NO with Jumper
=
=(~)
IL1
IL2
IL3
I4
VL1
VL2
VL3
V4
Q1
Q3
Q5
Q7
Q2
Q4
Q6
Q8
Serial
Interfaces
K1+
-K2
K3
K4
K5K6K7K8K9K10K11K12K13K14K15K16
R1R2R3R4R5R6R7R8R9R10R11R12BO 15
BO 14
BO 13
P3P4
NC or NOwith Jumper
BO16
P5P6P7P8
BO 17
BO 18
BO 19
BO 20
BO 21
BO 22
BO 23
P9P10P11P12P13P14P15P16H3H4
NC or NOwith Jumper
BO24
H5H6H7H8
BO 25
BO 26BO 27
BO 28
BO 29
BO 30
BO 31
H9H10H11H12H13H14H15H16
Fast BO1
Fast BO2
Fast BO3
Fast BO4
Fast BO5
Fast BO6
Fast BO7
BO8
BO9BO10BO11
BO12
K17K18J1J2J3
J4J5J6
J7J8J9J10J11
BI 1
BI 2
BI 3
BI 4
BI 5
BI 6
BI 7
BI 8J12P17P18N1N2N3
N4N5N6
N7N8N9N10N11
BI 9
BI 10
BI 11
BI 12
BI 13
BI 14
BI 15
BI 16N12H17H18G1G2G3
G4G5G6
G7G8G9G10G11
BI 17
BI 18
BI 19
BI 20
BI 21
BI 22
BI 23
BI 24G12
R15
R16
R17
R18
R13
R14
Flush mounting
Surface mounting
50
100
49
99
48
9847
97
45
95
44
94
46
96
7525742473
237222
7121702069199040893986
368535
8434833382326818671766
166515
641463136212
173123
122171121170120169119168118
149199148198197147196146195145194144
190140189139188138
172
187137186136185135184134166116165115164114
163113162112161111160110
174
124
L+ (37)
L- (38)
Figure 40
Housing 1/1 x 19’‘, Maximum Version 7SA522*-*D, 7SA522*-*H and 7SA522*-*M with24 Binary Inputs and 32 Binary Outputs
Note: for serial interfaces see Figure 38
Siemens SIP 4.2 · 08/99 39
Connection diagrams according to ANSI Standard
Figure 41
Housing ½ x 19’‘, Basic Version 7SA522*-*A, 7SA522*-*E and 7SA522*-*J with8 Binary Inputs and 16 Binary Outputs
Figure 42
Serial interfaces
=
=
(~)
IA
IB
IC
I4
VA
VB
VC
V4
Q1
Q3
Q5
Q7
Q2
Q4
Q6
Q8
R15
R16
R17
R18
R13
R14
SerialInterfaces
K1+
-K2
K3
K4
K5K6K7K8K9K10K11K12K13K14K15K16
R1R2R3R4
R5R6R7R8R9R10R11R12BO 15
BO 14
BO 13
K17K18J1J2J3
J4J5J6
J7J8J9J10J11
BI 1
BI 2
BI 3
BI 4
BI 5
BI 6
BI 7
BI 8J12
Fast BO4
Fast BO5
Fast BO6
Fast BO7
Live status contactNC or NO with Jumper
Fast BO1
Fast BO2
Fast BO3
BO8
BO9BO10BO11
BO12
Flush mounting
Surface mounting
25
50
24
49
23
48
22
47
20
45
19
44
21
46
4318421741
401439
381337123611
886387628661856084598358
74997398
9772967195709469
90
65
L+(15)
L-(16)
Front interface
System/Scadainterface
Service interfaceDIGSI, Modem
Timesynchronization
A
B
C
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
40 Siemens SIP 4.2 · 08/99
Connection diagrams according to ANSI Standard
=
=(~)
IA
IB
IC
I4
VA
VB
VC
V4
Q1
Q3
Q5
Q7
Q2
Q4
Q6
Q8
Serial
Interfaces
K1+
- K2
K3
K4
K5K6K7K8K9K10K11K12K13K14K15K16
R1R2R3R4
R5R6R7R8R9R10R11R12BO 15
BO 14
BO 13
P3P4
NC or NOwith Jumper
BO16
P5P6P7P8
BO 20
BO 21
BO 22
BO 23
P9P10P11P12P13P14P15P16
K17K18J1J2J3
J4J5J6
J7J8J9J10J11
BI 1
BI 2
BI 3
BI 4
BI 5
BI 6
BI 7
BI 8J12P17P18N1N2N3
N4N5N6
N7N8N9N10N11
BI 9
BI 10
BI 11
BI 12
BI 13
BI 14
BI 15
BI 16N12
Fast BO4
Fast BO5
Fast BO6
Fast BO7R15
R16
R17
R18
R13
R14
Live status contactNC or NO with Jumper
Fast BO1
Fast BO2
Fast BO3
BO8
BO9BO10BO11
BO12
BO 17
BO 18
BO 19
Flush mounting
Surface mounting
50
100
49
99
48
9847
97
45
95
44
94
46
96
7525742473
237222
7121702069199040893986
368535
843483338232
173123172122171121170120169119168118
190140189139188
138
187137186136185135184134
174
124
L+ (37)
L-(38)
149199148198
197147196146195145194144
Figure 43
Housing 1/1 x 19’‘, Medium Version 7SA522*-*C, 7SA522*-*G and 7SA522*-*Lwith 16 Binary Inputs and 24 Binary Outputs
Note: for serial interfaces see Figure 42
Connection diagrams according to ANSI Standard
Note: for serial interfaces see Figure 42
Live status contactNC or NO with Jumper
=
=(~)
IA
IB
IC
I4
VA
VB
VC
V4
Q1
Q3
Q5
Q7
Q2
Q4
Q6
Q8
Serial
Interfaces
K1+
-K2
K3
K4
K5K6K7K8K9K10K11K12K13K14K15K16
R1R2R3R4R5R6R7R8R9R10R11R12BO 15
BO 14
BO 13
P3P4
NC or NOwith Jumper
BO16
P5P6P7P8
BO 17
BO 18
BO 19
BO 20
BO 21
BO 22
BO 23
P9P10P11P12P13P14P15P16H3H4NC or NO
with Jumper
BO24
H5H6H7H8
BO 25
BO 26
BO 27BO 28
BO 29
BO 30
BO 31
H9H10H11H12H13H14H15H16
Fast BO1
Fast BO2
Fast BO3
Fast BO4
Fast BO5
Fast BO6
Fast BO7
BO8
BO9BO10BO11
BO12
K17K18J1J2J3
J4J5J6
J7J8J9J10J11
BI 1
BI 2
BI 3
BI 4
BI 5
BI 6
BI 7
BI 8J12P17P18N1N2N3
N4N5N6
N7N8N9N10N11
BI 9
BI 10
BI 11
BI 12
BI 13
BI 14
BI 15
BI 16N12H17H18G1G2G3
G4G5G6
G7G8G9G10G11
BI 17
BI 18
BI 19
BI 20
BI 21
BI 22
BI 23
BI 24G12
R15
R16
R17
R18
R13
R14
Flush mounting
Surface mounting
50
100
49
99
48
9847
97
45
95
44
94
46
96
7525742473
237222
7121702069199040893986
368535
8434833382326818671766
166515
641463136212
173123
122171121170120169119168118
149199148198197147196146195145194144
190140189139188138
187137186136185135184134166116165115164114
163113162112161111160110
174
124
L+ (37)
172
L- (38)
Figure 44
Housing 1/1 x 19’‘, Maximum Version 7SA522*-*D, 7SA522*-*H and 7SA522*-*Mwith 24 Binary Inputs and 32 Binary Outputs
Siemens SIP 4.2 · 08/99 41
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
42 Siemens SIP 4.2 · 08/99
Dimension drawings
Figure 45
Flush mounting 1/2 x 19’‘ with screw andplug-in terminals
225 (8.86)
220 (8.66)
5 (0.20) or M4
6 (0.24)
255.8
±0.3
(10.0
7±
0.0
12
)
245
+1
(9.6
4+
0.0
39
)
4.3
(0.1
7)
7.3(0.29)
13.2(0.52)
180 ± 0.5 (7.09 ± 0.020 )
206.5 ± 0.3 (8.13 ± 0.012 )
221 +2 (8.70 + 0.079 )
244
(9.6
1)
266
(10.4
7)
2(0.08)
29.5(1.16)
172 (6.77) 34(1.34)
29(1.14)
30(1.18)
266
(10.4
7)
29.5(1.16)
172 (6.77)
244
(9.6
1)
34(1.34)
2(0.08)
Housing 1/2 x 19’‘
Rear view
Housing 1/2 x 19’‘
Panel cutout
Side view withscrew terminals
Side view withplug-in terminals
Note: Dimensions are indicated in millimeters;values stated in brackets are inches
Siemens SIP 4.2 · 08/99 43
Dimension drawings
Note: Dimensions are indicated in millimeters;values stated in brackets are inches
Figure 46
Flush mounting 1/1 x 19’‘ with screw andplug-in terminals
450 (17.72)
445 (17.52)
255
.8±
0.3
(10.0
7±
0.012
)
245
+1
(9.6
4+
0.039
)
6 (0.24)
4.3
(0.1
7)
7.3(0.29)13.2
(0.52) 13.2(0.52) 13.2
(0.52)
216.1 ± 0.3 (8.51 ± 0.012 )
425.5 ± 0.3 (16.75 ± 0.012 )
446 +2 (17.56 + 0.079 )
6 (0.24)
6 (0.24)
6 (0.24)
5 (0.20)
or M4
5 (0.20)
or M4
5 (0.20)
or M4
5 (0.20)
or M4
244
(9.6
1)
266
(10
.47)
2(0.08)
29.5(1.16)
172 (6.77) 34(1.34)
29(1.14)
30(1.18)
266
(10
.47)
29.5(1.16)
172 (6.77)
244
(9.6
1)
34(1.34)
2(0.08)
Housing 1/1 x 19’‘
Rear viewHousing 1/1 x 19’‘
Panel cutout
Side view withscrew terminals
Side view withplug-in terminals
44 Siemens SIP 4.2 · 08/99
9 (0.35)
1 25
26 50
51 75
76 100
240 (9.45)
219 (8.62) 10.5(0.41)
225 (8.86)
280
(11
.02)
320
(12
.60)
344
(13
.54)
266
(10
.47)
260 (10.24)
29.5(1.16)
71(2.80)
72(2.83)
52(2.05)
25
(0.9
8)
1 50
51 100
200
101
151
150
280
(11
.02)
320
(12
.60)
344
(13
.54)
10.5(0.41)
465 (18.31)
444 (17.48)
450 (17.72)
9 (0.35)
Figure 47
Surface mounting 1/1 and 1/2 x 19’‘
Note: Dimensions are indicated in millimeters;values stated in brackets are inches
Front view
Housing 1/1 x 19’‘Front view
Housing 1/2 x 19’‘
Side view
SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines
Dimension drawings
Siemens SIP 4.2 · 08/99 45
Appendix
Explanation of ANSI numbers, IEC designation
ANSInumber
IEC ANSI Standard 7SA522
14 Underspeed device. A device that functions when the speed of a machinefalls below a determined value.
–
21
21N
Distance relay. A relay that functions when the circuit admittance, impedance,or reactance increases or decreases beyond a predetermined value.
Phase distance measurement
Ground distance measurement
FL Fault locator
25 Synchronizing or synchronism-check device. A device that operates whentwo ac circuits are within the desired limits of frequency, phase angle and voltageto permit or cause the paralleling of these two circuits.
Synchro-check function
27
27WI
U< Undervoltage relay. A relay that operates when its input voltage is less than apredetermined value.
Phase-Ground undervoltage incombination with Weak Infeedtrip function
32 Directional power relay. A relay that operates on a predetermined value of powerflow in a given direction or upon reverse power flow such as that resulting from themotoring of a generator upon loss of its prime mover.
–
33 Position switch. A switch that makes or breakes contact when the main deviceor piece of apparatus that has no device function number reaches a given position.
Application of programmable logic
34 Master sequence device. A device such as a motor opoerated multicontact switch,or the equivalent, or a programming device, such as a computer, that establishesor determines the operating sequence of the major devices in equipment duringstarting and stopping or during other sequencial switching operations.
Application of programmable logic
37 I< Undercurrent or underpower relay. A relay that functions when the current orpower flow decreases below a predetermined value.
Application of programmablelogic. Operating measured valueand limit value module
46 I2 Reverse-phase or phase-balance current relay. A relay that functions when thepolyphase currents are of reverse-phase sequence or when the polyphase currentsare unbalanced, or contain negative phase-sequence components above a givenamount.
1. Measured value supervision:current symmetry / balance
2. Application of programmablelogic: Operating measured valueand limit value module
47 Phase-sequence or phase-balance voltage relay. A relay that functions upon apredetermined value of polyphase voltage in the desired phase sequence, whenthe polyphase voltages are unbalanced, or when the negative phase-sequence voltage.
1. Measured value supervision:voltage symmetry / balance
2. Application of programmablelogic: Operating measured valueand limit value module
48 Incomplete sequence relay. A relay that generally returns the equipment to thenormal, or off, position and locks it out if the normal starting, operating, or stoppingsequence is not properly completed within a predetermined time.
Application of programmable logic
49 Machine or transformer thermal relay. A relay that functions when the temperatureof a machine armature winding or other load-carrying winding or element of a machineor power transformer exceeds a predetermined value.
–
50
50N
50N-2
50BF50HS
50 STUB50N STUB
I>>, I>
3I0>>>,3I0>>, 3I0>
3I0>
Iph
I>>>
Iph STUB
3I0 STUB
Instantaneous overcurrent relay. A relay that functions instantaneously on anexcessive value of current
Phase-overcurrent time protectionas backup
Ground overcurrent time protec-tion (directional)Ground-overcurrent time protec-tion as backup stage
Breaker failure protectionInstantaneous high speeds-o-t-f protection
STUB-bus overcurrent stage,phase and ground
51
51N
51N-2
Ip, 3I0p
3 I0p
3 I0p
AC time overcurrent relay. A relay that functions when the ac input current exceedsa predetermined value, and in which the input current and operating time are inverselyrelated d through a substantial portion of the performance range.
Phase-overcurrent inverse timeprotection as backup
Ground overcurrent inverse timeprotection (directional)
Ground-overcurrent inverse timeprotection as backup stage
52 AC circuit breaker. A device that is used to close and interrupt an ac power circuit un-der normal conditions or the interrupt this circuit under fault or emergency conditions.
–
55 cos ϕ Power factor relay. A relay that operates when the power factor in an ac circuitrises above or falls below a predetermined value.
Application of programmablelogic. Operating measured valueand limit value module
46 Siemens SIP 4.2 · 08/99
Appendix
Explanation of ANSI numbers, IEC designation
ANSInumber
IEC ANSI standard 7SA522
59 U>>, U> Overvoltage relay. A relay that operates when its input voltage is more than apredetermined value.
Phase-ground and zero sequenceovervoltage
62 Time-delay stopping or opening relay. A time-delay relay that serves in conjunctionwith the dvice that initiates the shutdown, stopping or opening operation in anautomatic sequence or protective relay system.
Application of programmablelogic
64 UT> Ground detector relay. A relay that operates upon failure of machine or otherapparatus insulation to ground.
Ground fault detection
66 Notching or jogging device. A device that functions to allow that only a specifiednumber of operations of a given device or equipment, or a specified number ofsuccessive operations within a given time of each other. It is also a device thatfunctions to energize a circuit periodically or for fractions of specified time intervals,or that is used to permit intermittent acceleration or jogging of a machine at lowspeeds for mechanical positioning.
–
67 AC directional overcurrent relay. A relay that functions on a desired value of acovercurrent flowing in a predetermined direction
67 N Directional ground-fault timeovercurrent
68
68 T
Blocking relay is a relay that initiates a pilot signal for blocking or tripping on externalfaults in a transmission line or in other apparatus under predetermined conditions, orcooperates with other devices to block tripping or to block reclosing on an out-of-stepcondition or on power swings
Power swing blocking
Power swing tripping
74
74 TC
Alarm relay. A relay other than an annunciator, as covered under device function 30,that is used to operate, or that operates in connection with, a visual or audible alarm.
Trip circuit supervision
79 AC reclosing relay. A relay that controls the automatic reclosing and locking out of anac circuit interrupter.
Auto reclosing function
81 Frequency relay. A relay that responds to frequency of an electrical quantity, operatingwhen the frequency or rate of change of frequency exceeds or is less than apredetermined value.
Application of programmablelogic: Operating measured valueand limit value module
85
85-21
85-67N
Tele-protection
Carrier or pilot-wire receiver relay is a relay that is operated or restrained by a signalused in connection with carrier-current or dc pilot-wire fault directional relaying.
Pilot schemes for distanceprotection
Pilot schemes for directionalground fault protection
86 Lockout relay. A hand or electrically reset auxiliary relay that is operated upon theoccurence of abnormal conditions to maintain associated equipment or devicesinoperative until it is reset
Trip signal lock-out
87 Differential protective relay. A protective relay that functions on a percentage, phaseangle, or other quantitive difference between two currents or some other electricalquantities.
see product range 7SD or 7UT
Siemens SIP 4.2 · 08/99 47
List of abbreviations used
A, B, C Phase designation according to ANSI
AMZ curvesIDMT characteristics
Inverse time overcurrent protection
ANSI American National Standard Institute
AR Auto-reclosure
ARC Auto-reclosureBI Binary Input
BO Binary Output
CFC Continuous Function ChartDCF77 Time synchronizing signal in Germany
DO D igital Output
EF Earth Fault detection
Flash-EPROM Electrically Programmable and Erasable MemoryFO Fiber Optic Conductor
GPS Global Position System
IBS CommissioningIEC International Electrotechnical Commission
IRIG B Time synchronizing signal via GPS
L1, L2, L3 Phase designation according to IECLED Light Emitting Diode
MHO Circle characteristic in the impedance plane
NC Normally Closed output relay contact, e.g. contacts are closed if relay is not activatedNO Normally Open output relay contact, e.g. contacts are open if relay is not activatedOLM Optical L ink Module
PLC Programmable Logic Control
PLC Power Line CarrierR Relay
SC Substation Controller
SCADA Supervisory Control and Data AquisitionSICAM Substation Information Control Automation and Monitoring System
SIMATIC SIEMENS Automation Technology
SIPROTEC SIEMENS PROTECTION
SIR Source to line impedance ratioRatio of the source impedance behind a relay terminal to the line impedance.
UMZ curvesDT characteristics
Definite time overcurrent protection
Siemens Companies and Representatives
Europe
Austria
Siemens AG ÖsterreichSiemensstr. 88 - 92A-1211 Wien
Mrs. StrobachPhone:+43-1-1707-22522Fax:+43-1-1707-53075
Belgium
Siemens S. A.Chaussée de Charlerois116B-1060 Brüssel
Mr. BelvauxPhone:+32-2-53621-2595Fax:+32-2-53621-6900
Czech. Republic
Siemens s. r. O.Na Strzi 40CZ-140 00 Prag 4
Mr. SlechtaPhone:+420-2-61095209Fax:+420-2-61095252
Denmark
Siemens A / sincerelyBorupvang 3DK-2750 Ballerup
Mr. JensenPhone:+45-4477 4309Fax:+45-4477 4020
Finland
Siemens OsakeyhtiöMajurinkatu 1FIN-02601 Espoo
Mr. TuukkanenPhone:+358-9-5105 3846Fax:+358-9-5105 3530
France
Siemens S. A.39-47, boulevard OrnanoF 93527 Saint Denis
Mr. CieslakPhone:+33-1-4922 3469Fax:+33-1-4922 3090
Great Britain
Siemens plcWilliam Siemens HousePrincess RoadManchester M20 2UR
Mr. DenningPhone:+44-1-614465130Fax:+44-1-614465105
Greece
Siemens A. E.Artemidos 8GR-151 10 Athen
Mr. RoubisPhone:+30-1-6864530Fax:+30-1-6864703
Italy
Siemens S.p. A.Via Fabio Filzi 29I-20 124 Mailand
Mr. MormilePhone:+39-02-66762854Fax:+39-02-66762347
Ireland
Siemens Ltd.8 Raglan RoadBallsbridgeDublin 4
Mr. KernanPhone:+353-1-603 2430Fax:+353-1-603 2499
Netherlands
Siemens Nederland N.V.Prinses Beatrixlaan 26NL-2500 BB Den Haag
Mr. LangedijkPhone:+31-70-333 3126Fax:+31-70-333 3225
Norway
Siemens A / sincerelyOstre Aker vei 90N-0518 Oslo
Mr. GravermoenPhone:+47-22-633140Fax:+47-22-633796
Poland
Siemens Sp.z.o.o.ul. Zupnicza 11PL-03-821 Warschau
Mr. DombrowskiPhone:+48-22-8709120Fax:+48-22-6709139
Portugal
Siemens S. A.Apartado 60300P-2700 Amadora
Mr. PissarroPhone:+351-1-417 8253Fax:+351-1-417 8071
Slovenia
Branch office: SiemensAustria
Spain
Siemens S.A.Apartado 155E 28 020 Madrid
Mr. MartinPhone:+34-1-5147562Fax:+34-1-5147037
Switzerland
Siemens-Albis AGFreilagerstr. 28 - 40CH-8047 Zürich
Mr. HorisbergerPhone:+41-1-495-3566Fax:+41-1-495-3253
Turkey
SIMKO Ticaret ve SanayiASMeclisi MebusanCaddesi12580040 Findikli-Istanbul
Mr. UzunerPhone:+90-0216-4593741Fax:+90-0216-4592155
Africa
Egypt
Siemens Ltd.Cairo, P.O.Box 775 /1151126, El Batal AhmedAbdel Aziz Str.Mohandessin
Mr. Aly Abou-ZiedPhone:+20-2-3499727,Fax:+20-2-3446774
South Africa
Siemens Ltd., PT & D26 Electron Ave.,Isando 1600
Mr. A MatthePhone:+27-11-921 2499Fax:+27-11-921 7100
Australia
Siemens Ltd., PT & DSydney Office383 Pacific HighwayArtarmon N.S.W. 2064
Mr. FominPhone:+61-2-9950 8649Fax:+61-2-9950 8733
North America
USA
SiemensPower Transmission &Distribution, LLC7000 Siemens Rd.Wendell , NC 27591
Mr. C. PretoriusPhone:+1-919-365 2196Fax: +1-919-365 2552
Mexico
Siemens S.A. DE C.V.Pte. 116 No. 590,Col. Ind. Vallejo02300 Mexico D.F.
Mr. LoredoPhone:+52-5-3282012Fax:+52-5-3282241
South America
Brazil
Siemens S.A.Coronel Bento Bicudo,111 Lapa05069-900 Sao Paulo -SP
Mr. MuramotoPhone: +55-11-833 4079Fax:+55-11-833 4391
Columbia
Siemens S.A., GDHSantafe de Bogota,D.C.Cra 65 No. 11-83Conmuta
Mr. Walter Bing-ZarembaPhone:+57-1-294 2222Fax:+57-1-294 2500
Asia
China
Siemens Ltd., PT & DNo. 7, WangjinZhonghuan Nanlu,Chaoyang DistrictBeijing, 100015
Mr. Sure En LeePhone:+86-10-6436 1888ext. 3806Fax:+86-10-64381464
Hong Kong
Siemens Ltd., PTD 58/FCentral Plaza18 Harbour RoadWanchai, Hong Kong
Mr. Humphrey S.K. LingPhone:+852-2583 3388Fax:+852-28029908
India
Siemens Ltd., PTD / ZLS4A, Ring Road, I.P. EstateNew Delhi 110 002
Mr. A. K. DixitPhone:+91-11-3719877Fax:+91-11-3739161
Indonesia
P.T. Siemens IndonesiaJl. Jend. A. YaniPulo Mas, Jakarta 13210P.O.Box 2469Jakarta 10001
Mr. Volker SchenkPhone:+62-21-4729 153Fax: +62-21-471 5055,472 9201
Korea
Siemens Ltd10th Floor Asia TowerBldg726, Yeoksam-dong,Kangman-guSeoul 100-630, Korea
Mr. Kim Se-hoPhone: +82-2-5277 805
Malaysia
SiemensElectrical EngineeringSdn Bhd13th Floor, CP Tower11 Section 16/11, JalanDamansara46350 Petaling JayaSelangor Darul EhsanMr. Vind SidhuPhone:+60-3-751 3929(direct)Phone:+60-3-7513888(switchb.)Fax:+60-3-757 0380
Phillipines
Siemens Inc.14 F Centerpoint buildingOrligas Center, Pasig CityMakati 1229, Metro Ma-nilaMr. De GuzmannPhone.:+63-2-637 0900Fax:+63-2-633 5592
Singapore
Power Automation89 Science Park, #04-13The Rutherford,Singapore 112861
Mr. AuPhone:+65-872 2688Fax:+65-872 3692
Taiwan
Siemens Ltd., PT & DDept.19th Floor, 333, Tun-HuaS. Road,Sec. 2, (P.O.Box 26-755)Taipei
Mr. Frances PengPhone:+886-2-23788900ext.832Fax:+886-2-2378 8958
Thailand
Siemens Limited, EV SPDept.Charn Issara Tower II,32ndFloor2922/283 New PetchburiRoadBangkapi, HuaykwangBangkok 10320
Mr. Chaturawit sincerely.Phone:+66-2-715-4815Fax:+66-2-715-4785
Vietnam
Siemens AG, Representa-tion5B Ton Duc Thang Str.District 1Ho Chi Minh City
Ms. HungPhone:+84-8825 1900Fax:+84-8825 1580
Siemens AG Power Transmission and Distribution
48 Siemens SIP 4.2 · 08/99
Siemens SIP 4.2 · 08/99 49
Conditions of Sale and Delivery · Export RegulationsTrademarks
Subject to the
General Conditions of Supplyand Deliveryfor Products and Services ofthe Electrical and ElectronicIndustry and to any other con-ditions agreed upon with therecipients of catalogs.
Technical data, dimensionsand weights are subject tochange unless otherwise sta-ted on the individual pages ofthis catalog.
The illustrations are for refe-rence only.
We reserve the right to ad-just the prices and shall char-ge the price applying on thedate of delivery.
A En 1.91a
Export Regulations Trademarks
In accordance with thepresent provisions of theGerman Export List and theUS Commercial Control List,export licences are notrequired for the productslisted in this catalog.
An export licence mayhowever be required due tocountry-specific applicationand final destination of theproducts.
Relevant are the exportcriteria stated in the deliverynote and the invoicesubject to a possible exportand reexport licence.
Subject to change withoutnotice.
All product designations usedare trademarks or productnames of Siemens AG or ofother suppliers.
Siemens Online
The Power Transmission andDistribution Group can alsobe found in the Internet:
http://www.ev.siemens.de
Conditions of Sale and Delivery
Responsible for
Technical contents: Michael Claus,Product Manager Distance ProtectionSiemens AG, EV S V13, Nuremberg, Germany
Ordering No: E50417-K1176-C114–A
Printed in Germany
Siemens Aktiengesellschaft Subject to change without notice Ordering No: E50417-K1176-C114–APrinted in Germany
Power Transmission andDistribution GroupProtection and SubstationControl Systems Division
P.O. Box 48 06
D-90026 Nuremberg
http://www.ev.siemens.de