Printed in USA

The IM30AE, IM30BE, IM30DE,and DM30E overcurrent relays aremembers of Cooper PowerSystems' Edison® line of protectiverelays. All four relays offer threephase and ground fault overcurrentelements, differing primarily in thedirectional or non-directionalnature of these elements.

■ IM30AE - Nondirectional phaseand ground overcurrent withautomatic cold load pickup.

■ IM30BE - Nondirectional phaseand ground overcurrent withautomatic cold load pick-upand two setting groups.

■ IM30DE - Nondirectional phaseovercurrent, and directionalground overcurrent elements.

■ DM30E - Directional phase andground overcurrent elements.

In addition, these relays also offerthe following common functions:

■ User selectable time currentcurves that may beprogrammed to match those ofcommon electro-mechanicalrelays, or IEC standard curves.Definite time characteristics arealso available.

■ Time overcurrent andinstantaneous elements.

■ Harmonic filtering on neutralinputs.

■ Separate phase and groundelement blocking inputs.

■ Breaker fail element.

As members of the Edison® relayfamily, these relays also share thefollowing features:

■ Simple five button manmachine interface (MMI) allowsaccess to all functions,settings, and stored datawithout the need for acomputer.

■ Bright electroluminescentdisplay easily visible even inbrightly lit environments.

■ Draw-out design permits relaytesting without disturbingconnections to case.

■ Modbus communicationprotocol and RS485 terminalon rear.

■ Modular design allows thedraw-out module to be fitted toa variety of space savingcabinet styles.

■ Four fully programmable outputcontacts. Three are Form C(SPDT) and one Form A/Bcontact.

■ Pick-up (start-time) elements.

■ Programmable resetcharacteristics.

■ Dedicated power supply/relayfail output contacts.

■ Event records.

■ Cumulative trip counters.

■ Auto-ranging power supplies.

InterchangeableThe IM30AE and IM30BE aredirect plug-in interchangeable, andexcept for certain input current andvoltage input connections, theIM30DE and DM30E are also plug-in interchangeable.

ApplicationsAny utility or industrial applicationrequiring three phase and groundovercurrent protection. If onlyphase or ground protection isdesired, the other elements maybe disabled. Both time overcurrentand instantaneous elements areprovided.

The programmable time currentcurves provide for coordinationwith practically any type of electro-mechanical or electronicovercurrent relay. The relay mayalso be set with definite timeovercurrent elements, therebyacting as a single or dual currentlevel detector for phase or groundelements.

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Electrical Apparatus

Multifunction Overcurrent RelaysDirectional and Nondirectional OvercurrentRelays IM30AE, IM30BE, IM30DE and DM30E 150-10

June 1997 • New Issue

Figure 1.Front View of the DM30E Overcurrent Relay

Cooper Power Systems

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The IM30BE offers dual settinggroups for all elements andfunctions. Selection betweenthese groups is accomplished viaan external input. Typicalapplications for dual setting groupsinclude the implementation ofdifferent protection practices duringstorm conditions, adapting todifferent fault levels based uponsystem configuration,compensating for peculiar coldload pickup conditions, andcoordination with downstreamdevices upon reconfiguration of thenetwork or feeder.

The voltage polarized directionalelements on the IM30DE andDM30E relays make them ideal forovercurrent protection wherecoordination requiring the ability tosense the direction of fault currentflow is required. If desired, thedirectional element(s) may beprogrammed as non-directional. Inaddition, the directional phaseelements of the DM30E may beused for current based controlapplications.

Cold Load PickupThe IM30AE and IM30BE offer anautomatic cold load pickup mode inwhich one the circuit breaker’sauxiliary contacts is connected toan external input on the relay.Upon closing of the breaker, therelay monitors the value of theinrush current. If within the first 60msec of the breaker closing, thecurrent exceeds 1.5 pu of the CTsrated primarily current, the settingsfor the instantaneous phaseovercurrent element are doubleduntil the phase current drops below1.25 pu.

Directional OvercurrentElementsThe IM30DE relay offers adirectional ground overcurrentelement, and the DM30E offersboth phase and ground directionalelements. The maximum torqueangle of the directional elements isadjustable from 0- 359˚.

The recommended settings for theground overcurrent element forboth the IM30DE and DM30Erelays is 270˚ for ungroundedsystems, 0˚ for resistance orreactance grounded systems, and300˚ (i.e., 60˚ lag) for solidlygrounded systems. For the groundovercurrent element, an adjustabledefinite time zero-sequencevoltage threshold must first beexceeded to enable theovercurrent element.

In addition to a directional groundovercurrent element, the phaseovercurrent elements of theDM30E are also directional. Thisis a voltage polarized elementwhich will operate down to 2% ofbus voltage.

Along with sensing reverse faultovercurrent flow, the directionalphase element of the DM30E maybe used to sense forward current(power), reverse current (power),inductive reactive current andcapacitive reactive current. Therecommended settings for sensingare as follows:

■ 0˚ for forward active power,180˚ for reverse active power.

■ 300˚ for forward faultovercurrent, 120˚ for reversefault overcurrent.

■ 270˚ for forward inductivereactive current, 90˚ forreverse inductive reactivecurrent.

■ 90˚ for forward capacitivereactive current, 270˚ forreverse capacitive reactivecurrent.

Breaker FailA programmable time delay is setequal to the breaker clearing time.If the fault is not cleared (i.e., thetrip element has not dropped out),before this timer expires, a breakerfail is indicated. This element maybe programmed to one or more ofthe output relays.

TargetsEight bright LED targets areprovided as follows:

■ Four red LEDs, one each forphase and ground timeovercurrent, and phase andground instantaneous. TheLEDs flash when the element ispicked up and constantlyilluminate upon trip.

■ A red LED which flashes if theoperation of any of theelements is blocked via theexternal blocking inputs.

■ A red LED illuminates if thebreaker fail function isactivated.

In addition, one yellow LED isprovided which illuminates whenany function has been disabled viaprogramming. A second yellowLED flashes when the relay is inprogramming mode, andilluminates constantly upon relay orpower supply failure.

Blocking InputsTwo blocking inputs are provided.One input is dedicated towardblocking all phase overcurrentfunctions, and one dedicated toblocking ground overcurrentfunctions. Each input isprogrammable so that whenactivated, either the timeovercurrent, instantaneousovercurrent, or both, elements maybe blocked.

IM30AE, IM30BE, IM30DE, and DM30E Overcurrent Relays

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While the blocking inputs areactive, the pickup of any elementassociated with the blockinginput(s) is prevented. Sensing ofthe input quantities and thecountdown of any timers beginsonly when the blocking isremoved.

The operation of each of theblocking inputs may be furtherprogrammed so that blocking iseffected for as long as theblocking input is activated, or sothat the effect of the blocking willexpire after an adjustable timedelay of .05 to .25 seconds.This latter function is particularlyuseful in implementing backupprotection for downstream oradjacent bus devices.

All inputs are opto-isolated.

Reset CharacteristicEach of the four programmableoutput relays may beprogrammed to reset in one oftwo manners.

■ Instantaneously upon theinput or calculated quantitiesdropping below the pickupvalue.

■ Manual reset (by front panelor computer command) only.

MeasurementsPhase and ground (zerosequence) current are availablefor display on all of the relays.The IM30DE adds zero sequencevoltage and the angle betweenthe zero sequence voltage andcurrent. The DM30E adds theangle between the phase

currents and voltages. Allmeasurements are available fordisplay at the relay and areaccessible by software.

Maximum ValuesEach relay has available forreview the highest currents andzero sequence voltages (asapplicable) recorded during thefirst 100 msec after breakerclosing (inrush) and after 100msec (maximum demand).

Last Trip RecordThe following parameters arestored in non-volatile memory,providing details of the last fivetrip events:

■ Which element was the causeof the last trip.

■ Currents, voltages, and phaseangles at time of trip.

In addition the relays keep arunning total of the cause of allbreaker trips.

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Nominal system frequency setting range ...................................................50 or 60 HzProgrammable rated primary input current of phase and neutral CT.......1 - 9999A in 1A stepsPhase and Ground Overcurrent (51/51N) time curve characteristics .......

Phase element (51) pickup range ...............................................................0.5-4.0 pu rated input current in 0.01 pu steps, or DisableGround element (51N) pickup range ...........................................................0.02 - 0.40 pu of rated input current in 0.01 pu steps, or DisableTime delay in Definite time mode ................................................................0.05 - 30.00 seconds in 0.01 second stepsIn Curve Mode offers the following curve shapes .......................................US Normal Moderate Inverse1

....................................................................................................................US Normal Short Inverse

....................................................................................................................US Normal Very Inverse1

....................................................................................................................US Normal Inverse...................................................................................................................US Normal Extremely Inverse1

....................................................................................................................IEC A - Inverse2

....................................................................................................................IEC B - Very Inverse2

....................................................................................................................IEC C - Extremely Inverse2

Time Dial range for US Normal Curves.......................................................0.2 - 100.0 in 0.01 stepsTime Dial range for IEC Curves ..................................................................0.02 - 10.00 in 0.01 steps

Phase instantaneous (50) characteristic .....................................................Pickup range ...............................................................................................0.5 - 40.0 pu of rated input current in 0.1pu steps, or DisableDefinite time delay.......................................................................................0.05-3.0 seconds in 0.01 second steps

Ground instantaneous (50N) characteristic ................................................Pickup range ...............................................................................................0.02-0.40 pu of rated input current in 0.1 pu steps, or DisableDefinite time delay.......................................................................................0.05-3.00 seconds in 0.01 second stepsBreaker Fail delay range .............................................................................0.05-0.25 seconds in 0.01 second steps

For IM30DE and DM30E relays only .............................................................Ground fault polarizing voltage enabling threshold setting range ...............2-25 V in 1 V stepsMaximum ground fault torque angle setting range......................................0-359° in 1°steps, or Disable3

For the DM30E relay only ..............................................................................Phase current maximum............................................................................0-359° in 1° steps, or Disable4

TABLE 1Functional Specifications

1 As defined in IEEE C37-118 Draft Standard.2 As defined in IEC Standards 255-3, 255-4.3 Disabling the ground fault torque angle setting converts the ground overcurrent characteristic to be non-directional in nature.4 Disabling the phase current torque angle setting converts the phase overcurrent characteristic to be non-directional in nature.www .

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TERMINALTERMINAL

Figure 2.Wiring Diagram of the IM30AE Relay

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Figure 3.Wiring Diagram of the IM30BE Relay

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Figure 5.Wiring Diagram of the DM30E Relay

Figure 4.Wiring Diagram of the IM30DE Relay

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IM30AE, IM30BE, IM30DE, and DM30E Overcurrent Relays

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DiagnosticsComplete memory and circuitdiagnostics are run upon poweringthe relay. The revision level of thefirmware is displayed at this time.

The relay runs a comprehensive setof diagnostics every 15 minutes thatincludes memory checksum, test ofthe A/D converters by injection ofan internally generated referencevoltage, and a check of the ALU.

The relay provides two manual testroutines which may be run at anytime. The first routine performs thesame 15 minute test and in additionchecks the target LEDs and thecontrol circuitry to the output relayswithout operating the output relays.The second test is identical but alsooperates the output relays.

Dimensions andElectricalSpecificationsSee Catalog Section 150-05 forelectrical specifications anddimensional information on allEdison relays.

Ordering InformationConstruct catalog number fromTable 2.

Example: IM30EAL5JS is anIM30AE with low range powersupply, 5A CT inputs, in a singlerelay case.

If ordering two or more relays to befit in a common case, the first relayordered should indicate the casestyle desired. This relay will belocated in the leftmost bay of the

case. Subsequent relays shoulduse the C2, C3, or C4 suffixes todenote their position in the caseusing the leftmost bay as a C1reference.

Example: An IM30DExxJN and anIM30AExxJC2 consists of anIM30DE relay in the leftmost bay ofa 19" rack case, with an IM30AErelay in the second bay from theleft. The third and fourth bays willbe empty and will be covered withblank faceplates.

Cooper Power SystemsQuality from Cooper Industries

P.O. Box 1640, Waukesha, WI 53187http://www.cooperpower.com/

©1997 Cooper Power Systems, Inc.Edison® is a registered trademark of Cooper Industries, Inc.

Printed on Recycled Paper

TABLE 2Catalog Numbers

5 The power supplies are user replaceable and interchangeable. See Catalog section 150-99.6 The relay itself may be drawn out of any of the listed cases and plugged into any of the other

case styles. The catalog number specified during ordering denotes the type of cabinet in which the relay will be shipped.

Description Catalog Number

Base Relay IM30AEIM30BEIM30DEDM30E

To the above add one each of thefollowing applicable suffixes

Power Supply5

24-110V AC/DC L90-220V AC/DC H

Rated CT Input1A 15A 5

Modbus Protocol J

Case Style6

Draw out relay only, no cabinet supplied DSingle relay case SDouble relay case T19" Rack mount cabinet N

Mounting PositionC2 C3C4

Denotes mounting position in either a doublecase or 19" Rack along with other relaysordered at the same time.

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