prd sgs xce 80k m20 0gb v010 - neti3187046.la01.neti.ee/...modifications reserved page 4/23...

GE Consumer & Industrial Power Protection

Product Description Digital Energy™ Uninterruptible Power Supply SG Series / 80 – 100 – 120 – 160 – 200 kVA 400 VAC CE – Series 0

SGSE_080_UPS_GE_01

SGSE_100-120_UPS_GE_01


SG Series 80 kVA SG Series 100 & 120 kVA SG Series 160 & 200 kVA Manufactured by:

GE Digital Energy General Electric Company CH – 6595 Riazzino (Locarno) Switzerland T +41 (0)91 / 850 51 51 F +41 (0)91 / 850 51 44

www.gedigitalenergy.com

Modifications reserved /23 PRD_SGS_XCE_80K_M20_0GB_V010.doc Product description SG Series 80-200 kVA / 400VAC CE

Model: SG Series 80 - 100 - 120 - 160 - 200 kVA / 400 VAC CE / Series 0

Date of issue: 15.01.2005

File name: PRD_SGS_XCE_80K_M20_0GB_V010

Revision: 1.0

Up-dating

Revision Concerns Date

COPYRIGHT © 2005 by GE Consumer & Industrial

Data subject to change without prior notice. All brands and product names are Trademarks or Registered Trademarks of their respective owners. Reproduction only upon written consent by GE.


Table of contents Page

1 INTRODUCTION............................................................................................................................................ 4 2 STANDARDS .................................................................................................................................................. 6

2.1 CE CONFORMITY ................................................................................................................................................................................6 2.2 STANDARDS .........................................................................................................................................................................................6 2.3 ISO 9001 ................................................................................................................................................................................................6

3 MAIN UPS ELEMENTS .................................................................................................................................. 7 4 UPS SINGLE OPERATION MODES............................................................................................................... 9

4.1 NORMAL OPERATION MODE VFI (VOLTAGE FREQUENCY INDEPENDENT)................................................................9 4.2 BATTERY MODE...................................................................................................................................................................................9 4.3 AUTOMATIC BYPASS...................................................................................................................................................................... 10 4.4 MANUAL BYPASS (MAINTENANCE BYPASS) ........................................................................................................................ 10

5 REDUNDANT PARALLEL ARCHITECTURE (RPA) ..................................................................................... 11 5.1 PRINCIPLES OF A RPA BASED REDUNDANT-PARALLEL SYSTEM ............................................................................... 12 5.2 REDUNDANT CONTROL ELECTRONIC.................................................................................................................................... 12 5.3 LOAD SHARING................................................................................................................................................................................ 12 5.4 SYNCHRONIZATION....................................................................................................................................................................... 13 5.5 COMMUNICATION BUSES ........................................................................................................................................................... 13 5.6 NO SINGLE POINT OF FAILURE ................................................................................................................................................. 13 5.7 FAILURE HANDLING....................................................................................................................................................................... 13 5.8 RPA SUMMARY................................................................................................................................................................................. 13

6 RPA OPERATION MODES........................................................................................................................... 14 6.1 NORMAL OPERATION MODE...................................................................................................................................................... 14 6.2 BATTERY MODE................................................................................................................................................................................ 14 6.3 RECTIFIER FAILURE......................................................................................................................................................................... 15 6.4 INVERTER DISTURBANCE ............................................................................................................................................................ 15 6.5 BYPASS MODE.................................................................................................................................................................................. 16 6.6 MAINTENANCE BYPASS MODE ................................................................................................................................................. 16

7 SUPERIOR BATTERY MANAGEMENT (SBM)............................................................................................. 17 8 LAYOUT........................................................................................................................................................ 18

8.1 LAYOUT SG SERIES 80 KVA ......................................................................................................................................................... 18 8.2 LAYOUT SG SERIES 100 & 120 KVA......................................................................................................................................... 18 8.3 LAYOUT SG SERIES 160 & 200 KVA......................................................................................................................................... 19

9 CONTROL PANEL........................................................................................................................................ 20 10 OPTIONS...................................................................................................................................................... 22

10.1 RPA CONFIGURATION KIT ........................................................................................................................................................... 22 10.2 INPUT FILTER FOR 5TH HARMONIC CANCELLATION ........................................................................................................ 22 10.3 INPUT FILTER FOR 5TH AND 11TH HARMONICS CANCELLATION................................................................................. 22 10.4 12 PULSE RECTIFIER WITH OR WITHOUT GALVANIC SEPARATION.......................................................................... 22 10.5 ACTIVE FILTER .................................................................................................................................................................................. 22 10.6 INPUT ISOLATION TRANSFORMER FOR RECTIFIER OR BYPASS.................................................................................. 23 10.7 OUTPUT CABINET FOR PARALLEL SYSTEM.......................................................................................................................... 23 10.8 EMI CLASS A...................................................................................................................................................................................... 23 10.9 MATCHING BATTERY CABINETS ............................................................................................................................................... 23 10.10 ADVANCED SNMP CARD.............................................................................................................................................................. 23 10.11 REMOTE SIGNALLING BOX (RSB) .............................................................................................................................................. 23 10.12 ISM - INTELLIGENT SYNCHRONIZATION MODULE ........................................................................................................... 23


1 INTRODUCTION SG Series family is an Uninterruptible Power Supply (UPS) designed to meet highest requirements concerning reliability and quality of electrical energy supply even in the most demanding applications.

The SG Series UPS is a true double conversion UPS system, with integrated output transformer for galvanic isolation, where the load is continuously supplied by the inverter through the rectifier. The new term ‘VFI’ (Voltage & Frequency Independent) applies for this concept, where the AC input voltage is first converted to DC voltage, also used to charge the battery, and then re-converted to AC voltage to supply the load.

This design and product topology is recognized as the only one able to reach the highest requirements of power reliability for critical applications. High output power quality, excellent behaviour with dynamic load variations, ‘zero’ interruption transfer time, adequate overvoltage protection and filtering are some of the most important features of this kind of UPS.

Thanks to RPA (Redundant Parallel Architecture) the system power can be expanded by paralleling units or increased in reliability by adding redundant units. Main features More Critical equipment supported Rated at 0.9 Power Factor, SG Series delivers more real power than other UPS in the market. With today’s trend toward power factor corrected loads, SG Series can support more total load than any other UPS available, allowing you to support a greater number of today’s enterprise computing Power Factor Corrected (PFC) equipment.

No single point of failure Redundant Parallel Architecture (RPA) is an exclusive GE technology. With RPA, SG Series UPS are controlled in a true peer-to-peer configuration where all critical elements and functions (including bypass) are redundant. SG Series is designed to be the most reliable power protection system available on the market today.

High Efficiency Using IGBT technology and Space Vector Modulation (SVM) strategy, SG Series offers low output voltage distortion and provides efficiencies up to 93%.

SMD technology The system processing electronic uses Surface Mounted Device (SMD) circuit technology. This provides an improvement in the signal-to-noise ratio, and prolongs calibration stability, therefore more immunity against electrical disturbances. This technology allows higher PCB integration resulting in higher reliability and serviceability of the UPS.

Fully digital - DSP technology Digital Signal Processor (DSP), Flash memory and SVM strategy are the technology corner stones of a new age of power quality and power reliability. DSP (Digital Signal Processor) performance enables the high sampling rates required to achieve the appropriate bandwidth for the current and voltage controls for an efficient double-conversion UPS.

SVM strategy The Space Vector Modulation (SVM) strategy is much more efficient them a standard PWM (Pulse With Modulation). SVM allows the switching losses to be reduced and a more extended use of the battery capacity therefore more autonomy.

Extremely flexible Tailor made power protection to meet your individual installation requirements; SG Series offers various options like input harmonic filters and our comprehensive JUMP software suite for mission control and data protection to cover all your application needs.


Applications • Computer and data centre • Medical equipment • Call centres • Broadcasting and satellite transmission system • Manufacturing and process control units • Transportation infrastructure • Security system • Financial institutions • Fixed and mobile voice and data transmission


2 STANDARDS 2.1 CE CONFORMITY SG Series UPS are designed in conformity with European Council directives:

• 89 / 336 EEC (and its amendments 91 / 263 and 92 / 31)

• 73 / 23 EEC

• 93 / 68 EEC

concerning to electromagnetic compatibility (EMC) and safety of electrical equipment. 2.2 STANDARDS The UPS design comply the international Standard, for worldwide installation. Standard to which conformity is declared:

Standard Description

IEC 62040-1-1 Uninterruptible power systems (UPS) - General and safety requirements for UPS

IEC 62040-2 Uninterruptible power systems (UPS) - Part 2: Electromagnetic compatibility (EMC) requirements

EN / IEC 62040-3 Uninterruptible power systems (UPS) - Part 3: Method of specifying the performance and test requirements

2.3 ISO 9001 GE Digital Energy SA is an ISO 9001: 2000 certificate organization, SQS Reg. No. 10448-05. SG Series UPS are in accordance to this standard requirement during the different product stages including design and development, production, testing, inspection and servicing.


3 MAIN UPS ELEMENTS

Fig. 3-1 Block Diagram

The SG Series system can be divided into the following main elements: Control System SG Series is designed with microprocessor-controlled signal processing circuits. The interface between the operator and the unit is provided by the monitoring system on the front panel. This monitoring system consists of an active mimic diagram, a keyboard and a backlit display. Rectifier The standard rectifier consists of a 6-pulse thyristors bridge, which converts the 3-phase mains voltage into a controlled and regulated DC-voltage. This regulated DC-voltage is used to supply power to the inverter and to provide charging power to the battery. The standard version employs software control to limit rectifier start-up current and voltage (soft start procedure). Inverter The inverter converts the DC-voltage into a three-phase AC-voltage with constant amplitude and frequency, which is completely independent and isolated from the AC-input voltage. The SG Series uses an IGBT based inverter with SVM (Space Vector Modulation) regulation achieving extremely high efficiency even at partial load conditions. The inverter with accompanying isolation transformer allows the output to remain totally unaffected by mains disturbances or failures while delivering extremely low output distortion when driving non-linear loads. Automatic bypass The automatic bypass consists of a static semiconductor-switch (SSM: Static Switch Module), used to provide an uninterrupted transfer of the load from inverter to mains. It also transfer the load to input mains in the case of overload, short-circuit , inverter fault condition or manual input. During overload and short-circuit, re -transfer is automatically initiated once normal load conditions are restored.


Back-feed protection SG Series is equipped, as standard feature, by a back-feed protection tool installed inside the UPS cabinet. The back-feed protection is a safety requirement for servicing personnel, according to IEC 62040-1 (UPS safety), realized by an electromagnetic contactor in series with the static bypass switch of the bypass line. It avoids flow of current upstream of the UPS, via the automatic bypass, during operation in battery mode. This protection works automatically by opening contactor K6 (in series with the thyristors of the static switch) and eventually K7, and acts in case of internal defects of the system, or due to wrong manipulations on the manual bypass Q2. Manual bypass The manual bypass consists of a pair of manual switches (Q1 and Q2), which removes the UPS from the load for maintenance, while still supplying the load with power directly from the mains. Battery The battery supplies the DC power to the inverter when the mains is missing or out of acceptable tolerances. It is normally sized to supply the inverter at rated load for the required back-up time.


4 UPS SINGLE OPERATION MODES To ensure an uninterrupted supply of the load under all operating conditions, the standard SG Series UPS already offers four different operating modes.

Additionally to the primary AC/DC/AC energy supply connected battery and a static bypass offer two more possibilities to assure energy to the critical load. The fact of having multiple energy sources for the load greatly increases the Ioad’s reliability and introduces also the concept of redundancy. This UPS internal redundancy concept will be emphasized when the Redundant Parallel Architecture (RPA) configuration is discussed.

Transfer from one operating mode to another takes place interruption-free for the load.

SG Series offers all the following operating modes as a standard: • Normal operation mode VFI (Voltage Frequency Independent) • Battery mode • Automatic bypass • Manual bypass (maintenance bypass) 4.1 NORMAL OPERATION MODE VFI (VOLTAGE FREQUENCY INDEPENDENT)

Under normal conditions the load is permanently powered by the inverter with constant amplitude and frequency.

The rectifier, powered by the mains, supplies the inverter and the battery-charger keeps the battery fully charged.

The inverter converts the DC voltage in a new AC sine-wave voltage with constant amplitude and frequency independently from the input mains power. None electrical disturbance on the input mains is transferred to the load.

Fig. 4.1-1 Block diagram normal operation mode

4.2 BATTERY MODE

Mains failure operation When the mains is no longer within acceptable tolerances, the Battery will provide the DC power to the inverter. The inverter will maintain continuous AC power to the load until the battery voltage reaches the lower limit of the inverter operation capability. During the discharge, the LCD screen displays the estimated time the battery can support the critical load. Prior to complete battery discharge, the ‘stop operation’ alarm (shutdown imminent) warns the operator that the battery is almost discharged and the UPS is about to shut down.

Fig. 4.2-1 Block diagram mains failure operation


Mains recovery operation As soon as the AC input power recovers, the rectifier will start automatically, supplying DC power to the inverter and recharging the Battery. If the inverter was previously shut down due to low battery, the load will be initially powered by mains through the automatic bypass. When the battery is sufficiently recharged to ensure a minimum time of operation with the present load, the inverter will start automatically and the load will be transferred back to the inverter.

Fig. 4.2-2 Block diagram mains recovery operation

4.3 AUTOMATIC BYPASS

In normal operation, the inverter supplies the load.

When the control system detects a fault in the inverter, an overload condition or a short-circuit condition, the automatic bypass will transfer the critical load to the mains without interruption.

When the inverter recovers, or the overload or short-circuit condition is corrected, the load will be automatically transferred back to the inverter.

If the UPS is unable to return to normal mode following an automatic transfer to bypass mode, an alarm condition will be initiated.

A manual bypass (operator initiated) will not be considered as an alarm condition.

Fig. 4.3-1 Block diagram automatic bypass

4.4 MANUAL BYPASS (MAINTENANCE BYPASS)

The manual bypass circuit consists of two manual switches, which permits transfer of the load directly to the unconditioned AC power without interruption leaving the UPS available for maintenance.

Fig. 4.4-1 Block diagram manual bypass


5 REDUNDANT PARALLEL ARCHITECTURE (RPA) Whenever SG Series UPS are applied in Mission Critical Applications, a single unit protection is no longer sufficient. To respond to this requirement for the highest level of reliability, GE C&I developed a redundant-parallel system, known as RPA (Redundant Parallel Architecture), a GE C&I exclusivity.

To achieve highest levels of reliability, two or more SG Series are linked in a peer-to-peer configuration, concurrently supplying the load. Thanks to the total modularity of RPA, the system can be easily expanded to higher power or higher redundancy levels at any time under full working conditions.

Fig. 5-1 Block diagram RPA parallel system operation

Two or more equal power units can be paralleled to increase the output power (paralleling for capacity) or to improve the overall reliability of an UPS system (paralleling for redundancy). The outputs of parallel units are connected to a common power bus, and in ‘normal operation mode' the units connected on the parallel bus share the load equally. The modular concept of SG Series allows parallel operation of up to 8 units, without using paralleling switchgear, external bypass circuits or common control circuitry (see Fig. 5-1). Parallel units for power capacity Several units can be paralleled in order to achieve output power greater than the maximum power of a single unit. The maximum total power shared between the paralleled units is equal to the total installed nominal power. In the event of a failure of one unit, the power supplied by the UPS system becomes insufficient and the load will be transferred to the mains bypass source.


Parallel units for redundancy The nominal power rating of the n out of n+1 redundant paralleled modules must be equal to or higher than the required load power. The load will be equally shared by the n+1 units connected on the output bus. Should one of the n+1 paralleled units trip Off-line, the remaining (n) modules will supply the load, maintaining conditioned power to the critical load. From this results higher reliability and security for the load plus a higher MTBF (Mean Time Between Failures). 5.1 PRINCIPLES OF A RPA BASED REDUNDANT-PARALLEL SYSTEM RPA (Redundant Parallel Architecture) is a unique system to provide highest power reliability, respecting the reflections, patterns and standards as defined by the relevant industries for mission critical applications for the technical term ‘redundancy’. Fundamental elements to the term ‘redundancy’ are: • no single failure point. • fault tolerance - means the system can accept any type of one single failure without any influence to

the critical function – in UPS applications this means to accept any event from a simple fuse failure to the failure of an entire inverter without any influence to the load.

• error masking – error isolation and error removal under active load conditions. • restore full operating condition without bypass operation for the critical load. To comply with term ‘redundancy’, a UPS system generally needs to be designed as follows: • decentralized bypass concept. • decentralized control electronics. • redundant (n+1) operation and control for critical functions as ‘synchronization’ and ‘bypass

operation’. • redundant communication link between individual units. 5.2 REDUNDANT CONTROL ELECTRONIC Each individual unit has its own operation controller (microprocessor) for redundant-parallel operation. When active, all controllers continuously intercommunicate in order to manage the entire system in a democratic way. Example: If, in a RPA system of 3 UPS ‘A’, ‘B’, ‘C’, unit ‘A’ detects a mains failure and ‘B’ and ‘C’ cannot ‘see’ this failure, ‘A’ will be isolated and it’s functions will be managed by the two remaining units as long as there is no immediate risk for the critical load. RPA does not have any ‘Master-Slave’ condition. 5.3 LOAD SHARING The RPA operation controller is the supervisor to monitor the equal load distribution on each UPS. It does this by separately regulating the power exchange (which must be as near as possible to zero) between each single installation. To achieve this, the RPA operation circuitry engages in continuous calculation of an index value, defined by the sum of the measured values of all the single installations divided by the number of units active. This index value is then passed to the individual units as a reference parameter for the regulation of the inverter. Due to the extremely precise synchronization, the load sharing follows physical rules in a natural (and dynamic) way, the need to intercept for the controller is therefore almost not existent.


5.4 SYNCHRONIZATION The most important feature of the RPA operation is to ensure the synchronization of the entire system on one hand between all RPA UPS and on the other hand via the bypass to mains. With advanced signal elaboration and enhanced high precision tracking, RPA reaches the highest precision in synchronization in the industry. The unique precision of 0.05 milliseconds between units allows a high speed, voltage based, load sharing. 5.5 COMMUNICATION BUSES Redundant high-speed buses, 10 Mbits/s, provide the communications among the different UPS in RPA configuration. The redundancy in the communication buses, allow a high UPS system reliability even in case of accidental interruption of one of them. The maximum allowed distance between the first and the last UPS is 85 m. 5.6 NO SINGLE POINT OF FAILURE With RPA, principally all modules as rectifier, inverter, bypass, controllers and communications are redundant. There are no single failure points, centralized elements or Master-Slave situations. 5.7 FAILURE HANDLING RPA is able to keep a single unit isolated in the event of disturbances in the redundant-parallel system. In this case, the RPA logic of the affected unit will communicate the ‘problem’ to the shared system information. If necessary, RPA will automatically ‘isolate’ the affected unit until the problem is solved.

The level of isolation is defined by system parameters, the goal to keep the load UPS protected as long as possible, has the highest importance. As a consequence, an affected unit may be managed by the system and continue to work in RPA or it may be totally excluded from the process.

For example: the measured values received from an ‘isolated’ UPS are not taken into account when the index value for the load sharing is calculated. As long as the output of the remaining UPS’s is enough to supply the load, RPA will remain active and feed the load via the inverters. It may be, the remaining inverters are no longer able to provide ‘redundancy’, in this case RPA acts as ‘parallel’ system. In case the available power is insufficient (overload condition), RPA will switch all units to bypass mode. 5.8 RPA SUMMARY Redundant inverters RPA sustains the load as long as possible via the paralleled inverters of the individual units. If one or more single units suffer a disturbance, the then parallel system only switches to ‘bypass mode’ when the total power of all the available inverters is no longer sufficient to sustain the load in ‘normal operation mode‘. Decentralized bypass and redundant control Even at full load the static bypass of a single installation can fail without jeopardizing the power supply of the load. Redundant microprocessors Due to multiple redundancy and shared tasks there is no common point of failure or bottleneck.


6 RPA OPERATION MODES In order to ensure no-break power supply under all operating conditions, the RPA system has several operating modes. Transfers from one mode to the other are performed without interruption for the load. 6.1 NORMAL OPERATION MODE

K6

RECTIFIERK4

BATTERY

K3

BYPASSAUTOMATIC

INVERTER

Q1

K7

Q2

K6

RECTIFIERK4

MAINS LOAD

BATTERY

K3

AUTOMATICBYPASS

INVERTER

Q1

K7

Q2

K6

BATTERY

K4RECTIFIER

K3

BYPASSAUTOMATIC

INVERTERK7

Q1

Q2

When the system is in ‘normal operation mode’, all the rectifiers as well as all the inverters of the installation are operating. The mains supplies the parallel-connected rectifiers. Each rectifier supplies both battery and inverter by converting the mains AC voltage into a DC voltage. All the inverters equally share the load.

6.2 BATTERY MODE MAINS LOAD

K6

BYPASSAUTOMATIC

K3

BATTERY

K4RECTIFIER

K7INVERTER

Q1

Q2

INVERTER

K6

RECTIFIERK4

BATTERY

AUTOMATICBYPASS

K3

K7

Q1

Q2

K6

INVERTERRECTIFIERK4

BATTERY

BYPASSAUTOMATIC

K3

K7

Q1

Q2

A mains failure will trigger ’Battery Mode’. The rectifiers do not supply any energy. The batteries supply the inverters with the required energy. The inverters supply the load as described under ‘normal operation mode’. If the mains does not recover and the batteries are used up, the load will be cut off. In this situation, when the mains recovers, the parallel bypass will supply the load. For security reasons, the inverters will have to be switched On manually. RPA accepts centralized batteries (common battery).


6.3 RECTIFIER FAILURE

K3

BYPASSAUTOMATIC

K3

AUTOMATICBYPASS

K4

BATTERY

RECTIFIER

BATTERY

RECTIFIER

INVERTERK7

Q1

INVERTERK7

Q2

Q1

BYPASSAUTOMATIC

K3

K4

BATTERY

RECTIFIER

MAINS

INVERTERK7

Q2

Q1

Q2LOAD

K6

K6

K6

K4

'Rectifier disturbance mode' is recognised by a disturbance in one or more rectifier. The disturbed rectifier(s) do not supply any energy. Depending on the set-up, defined by the customer, the inverters of those single units having disturbed rectifiers, will draw their energy from the battery or RPA will immediately isolate the disturbed unit. The other installations continue in ‘normal operation mode'. All the inverters acting jointly, as described under ‘normal operation mode' sustain the load.

6.4 INVERTER DISTURBANCE

K6

RECTIFIERK4

BATTERY

K3

BYPASSAUTOMATIC

RECTIFIERK4

BATTERY

K3

AUTOMATICBYPASS

INVERTERK7

Q1

Q2

INVERTERK7

Q1

MAINS

Q2

LOAD

K3

AUTOMATICBYPASS

K6

K4

BATTERY

RECTIFIER INVERTERK7

Q1

Q2

K6

'Inverter disturbance mode' is triggered by a disturbance in one or more inverters. As long as the output of the remaining single units is sufficient to sustain the load, RPA remains in ‘normal operation mode' but the system may become ‘parallel’ and is no longer ‘redundant’. The inverter output contactor (K7) of the disturbed unit opens automatically to isolate the disturbed unit from the load. The rectifiers of the disturbed units, depending on the nature of the disturbance, will continue to charge the batteries. The disturbed units can also be completely separated from the mains and from the load, as illustrated, to enable repair work to be carried out.


6.5 BYPASS MODE

INVERTER

MAINS

RECTIFIERK4

K6

BATTERY

AUTOMATICBYPASS

K3

K7

Q1

Q2LOAD

RECTIFIERK4

K6

BATTERY

K3

BYPASSAUTOMATIC

INVERTERK7

Q1

Q2

K6

RECTIFIERK4

BATTERY

K3

AUTOMATICBYPASS

INVERTERK7

Q1

Q2

‘Bypass mode’ is triggered when all the available inverters are unable to sustain the load (e.g. in the case of disturbance of several inverters or severe overload). If the load exceeds 110% of the sum of the rated outputs of all inverters, the load will be sustained directly from the input mains via the static bypasses. All inverter output contactors (K7) are opened automatically and the inverters, depending on the type of disturbance, continue to operate and the rectifiers continue to charge the batteries. If the load level once again returns below 100% of the sum of the outputs of all the available inverters, RPA will close all K7 and automatically switches back to ‘normal operation mode'.

6.6 MAINTENANCE BYPASS MODE

INVERTERRECTIFIER

BATTERY

AUTOMATIC

K3

BYPASS Q1

Q2MAINS LOAD

INVERTERRECTIFIER

BATTERY

BYPASSAUTOMATIC

K3

Q1

Q2

INVERTERRECTIFIER

BATTERY

K3

AUTOMATICBYPASS Q1

Q2

K6

K4

K6

K4

K6

K4

K7

K7

K7

The ‘maintenance bypass mode’ is used in case, all units are switched off and the system output has to remain powered. One maintenance bypass for each UPS. Maintenance on each UPS subcomponents can be made voltage free. During this mode of operation the load is not protected.


7 SUPERIOR BATTERY MANAGEMENT (SBM) The SG Series UPS has an additional management feature known as SBM (Superior Battery Management). The battery system of a UPS is a critical element, which defines system reliability and must be effectively maintained and monitored to ensure optimum reliability and protection of the critical load. SBM is a programmable management feature that monitors the battery system for failures by periodically testing the battery system. Within this feature is the ability to calculate true battery autonomy and remaining back up time during a mains outage. SBM performs this function by measuring the volts per cell of the battery system and compensating for temperature and load conditions. This means that any shutdown or ‘stop operation’ will be initiated based on measured values and not time. During start up and commissioning of the SG Series UPS specific battery information is entered into the SBM software such as Ah ratings and number of cells. This allows the SG Series UPS with SBM the flexibility to work with all kinds of battery types (vented, sealed or even NiCd). The programmable features of SBM allow the user to select the frequency and type of battery tests that are to be performed. The frequency can range from once a week to once a year, and the type of test can range from deep cycle to a short three -minute discharge. All tests are performed automatically with the UPS in ‘normal operation mode'. The tests are logged in the UPS events menu and any failure of the battery system is reported to the user with a front panel alarm. SBM also gives the user the ability to perform a manual test at any time. Superior Battery Management is also able to manage up to 4 UPS rectifier can be installed on a single battery. This feature allows the sharing of one single battery among different UPS in RPA configuration. It can also be accessed and configured remotely using the protection software available for the SG Series UPS; and with the features described above SBM will increase over all system reliability and add to the level of security to the critical load.


8 LAYOUT 8.1 LAYOUT SG Series 80 kVA

SGSE_080_UPS_GE_02

800800

1820

Fig. 8.1-1 SG Series 80 kVA - General view

8.2 LAYOUT SG Series 100 & 120 kVA

8001200

1820


Fig. 8.2-1 SG Series 100 & 120 kVA - General view


8.3 LAYOUT SG Series 160 & 200 kVA

1650 800

1820

SGSE_160-200_UPS_02

Fig. 8.3-1 SG Series 160 & 200 kVA - General view


9 CONTROL PANEL A user-friendly control panel is available on the UPS front door, able to shows the UPS working conditions and all the information by a LCD screen (4 lines with 20 characters each and six key).

Fig. 9-1 Control Panel

Synoptic diagram The mimic diagram shows at firs glance the UPS status operation.

Fig. 9-2 LEDs on synoptic diagram

LED 1 = Input mains rectifier (green) LED 2 = Input mains bypass (green) LED 3 = Rectifier ON (green) LED 4a = Discharging (yellow) LED 4b = Charging (green) LED 5 = Inverter ON (green) LED 6 = Load on inverter (green) LED 7 = Load on mains (green) LED 8 = Output load voltage (green) LED 9 = Manual bypass (Q2) ON (yellow)

Battery level

All LEDs ON indicate that the Battery is fully charged LED a Yellow:

• Fixed: indicating last 25 % of Battery backup. • Blinking: indicating Battery backup ≤ 5%.

LED b, c, d Green: • Each one indicating 25 % of Battery backup.

Load level

LEDs ON indicate the Load status of the UPS LED d red (≥100 % load) LED c yellow (100% load) LED b green (66% load) LED a green (33% load)


User LCD Interface

Fig. 9-3 LCD screen

Consist of an LCD screen, 4 lines with 20 characters each and six keys. It offers: • UPS operating, AC and DC metering

information. • History of events (alarms and messages). • Functionality can be programmed to meet

customer needs by changing parameters. Alarms

alarm

General alarm condition It blinks when one or more alarm is activated. The internal buzzer is ON.

service check

Service check LED ON indicates that a regular maintenance service is needed.

Sop operation LED ON indicates that the Battery reserve lasts for only 3 more minutes (selectable). LED ON in case of overtemperature or overload >125% together with missing mains. After the timeout the Inverter will shut down.

Total off pushbutton

A red cover protects the push-button ‘total off’. By pressing it, you immediately separate the UPS from mains and the load.


10 OPTIONS A wide range of options enables SG Series UPS system to fulfil a wide range of needs. 10.1 RPA CONFIGURATION KIT This option allows up to 8 units for parallel operation. The RPA kit can configure any single UPS unit into a parallel unit. 10.2 INPUT FILTER FOR 5th HARMONIC CANCELLATION The 5th harmonic input filter is used for reducing the 5th harmonic generated by the rectifier. This filter reduces the input distortion and increases the input power factor. The 5th harmonic input filter is activated when the UPS load reaches approximately 50% (adjustable depending of the customer needs/configuration). This option does not require an additional cabinet; the filter is an internal addition to the UPS thereby minimizing additional footprint. 10.3 INPUT FILTER FOR 5th and 11th HARMONICS CANCELLATION The 11th harmonic filter combined with the 5th harmonic input filter is used for reducing the 5th and 11th harmonics generated by the rectifier. This filter combination reduces the input distortion and increases the input power factor. The filters are activated when the UPS load reaches 50% (adjustable depending of the customer needs/configuration). This option does not require an additional cabinet; the filters are an internal addition to the UPS thereby minimizing additional footprint. 10.4 12 PULSE RECTIFIER WITH OR WITHOUT GALVANIC SEPARATION Twelve-pulse rectifier is realized by two six-pulse rectifier 30 electrical degrees shifted. It performs the elimination of 5th, 7th, 23rd, 25th etc. current harmonics. It is proposed in two possible configurations: without galvanic separation realized by a phase shift transformer and a coil or with galvanic separation realized by a double wire transformer that also perform the Rectifier galvanic separation. Available only for SG Series 80 – 100 –120 kVA. 10.5 ACTIVE FILTER Active Filter is an IGBT (Insulated Gate Bipolar Transistor) power bridge, which injects harmonic currents into the electrical network with exactly the opposite phases to whose that are to be filtered. It performs a dynamic UPS current harmonic compensation. It is proposed in combination with the 5th harmonic filter, which is installed inside the UPS cabinet, to give the best performance in term of harmonic compensation and power factor correction, with a negligible effect on the total UPS system efficiency. Active Filter is available in wall-mounted or in floor cabinet according to the size.


10.6 INPUT ISOLATION TRANSFORMER FOR RECTIFIER OR BYPASS Used to help isolate the UPS form the input mains or to generate a local UPS neutral whenever required. 10.7 OUTPUT CABINET FOR PARALLEL SYSTEM To realize a parallel system for 2 or more UPS, with a maintenance bypass switch. 10.8 EMI CLASS A Optional internal EMI filter available for applications where EMI Class A compliance is required. 10.9 MATCHING BATTERY CABINETS Different sizes matching battery cabinets, with variable shelves. 10.10 ADVANCED SNMP CARD This optional plug in card allows the UPS to be managed remotely with GE's protection software. 10.11 REMOTE SIGNALLING BOX (RSB) Remote Signalling Box equipped with: synoptic diagram, alarm reset and lamp test keys. Cable connection to UPS not included. 10.12 ISM - INTELLIGENT SYNCHRONIZATION MODULE The ISM is an additional external accessory that can be used to synchronize two separated and independent UPS groups. It is typically used in combination with a Static Transfer Switch (STS), to perform additional redundancy to load supply.

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