Description

GE SR745-W2-P1-G1-HI-A-L-R belongs to the GE Multilin 745 series high-performance transformer management relay,which is suitable for the main and backup protection and management of two winding or three winding transformers.Its”W2″supports dual winding,”P1″represents 1A CT input,”G1″is an advanced logic version,”HI”supports harsh environments,”A”has analog input/output,”L”represents with local language or LCD,and”R”means with drawer rack installation.

It integrates comprehensive protection functions such as differential protection(%differential),zero sequence and ground overcurrent,overvoltage/undervoltage,overclocking/underfrequency,no-load excitation,and overexcitation(V/Hz),and has advanced functions such as harmonic blocking and adaptive overcurrent protection to ensure no misoperation during excitation surge or high harmonic incidence.Equipped with FlexLogic™，Users can write custom control logic in a PLC like manner to reduce dependence on external auxiliary equipment.

This module has a drawer style structure that allows for quick maintenance and replacement on live sites.It also has built-in IRIG-B clock synchronization,event recording,and waveform capture functions,which can capture up to 128 weeks of data and provide reliable basis for fault diagnosis.The working environment temperature of the module can reach-40°C to+70°C,and the humidity can reach up to 90%(without condensation),suitable for outdoor or high humidity industrial places.

GE SR745-W2-P1-G1-HI-A-L-R

Main features and advantages

Comprehensive protection function

Support protection strategies such as differential,grounding/phase to phase overcurrent,overexcitation(V/Hz),overvoltage/undervoltage,overvoltage/underfrequency,excitation failure,etc.Equipped with harmonic blocking and adaptive overcurrent functions,it improves the ability to suppress misoperations.

FlexLogic Programmable Logic

Users can use FlexLogic™Customize logical conditions and action outputs to achieve complex protection and monitoring behaviors without the need for an external PLC.

Drawer style hot pull structure

Drawer rack design is used for quick replacement,maintenance without power outage,and improves operation and maintenance efficiency.

Automatic ratio correction

Support CT ratio deviation correction,combined with excitation winding position adjustment,to achieve more accurate differential protection.

Strong adaptability to the environment

Supports high temperature and high humidity environments,ensuring stable operation even when the drawer casing is damp,greatly expanding its application scenarios.

Highly compatible with communication

Equipped with RS-232/RS-485/RS-422/Ethernet interfaces,compatible with Modbus RTU/TCP and DNP 3.0 protocols,easy to integrate into SCADA/DCS systems.

Diagnosis and maintenance support

Built in 256 event records and waveform capture functions,combined with IRIG-B time to accurately trace faults,and support EnerVista/IMIC remote configuration to optimize device management.

technical specifications

Product model:SR745-W2-P1-G1-HI-A-L-R

Manufacturer:GE Multilin(GE Vernova)

Product type:Transformer Protection Relay

Number of windings:W2=double winding

CT input:P1=1A secondary

Logic type:G1=Advanced version

Control power supply:HI=industrial grade control power supply

Analog I/O:A=includes analog input/output

Display interface:L=with enhanced LCD keyboard

Installation method:R=drawer rack installation

Protection functions:differential,over/under voltage,over/under frequency,overexcitation,over-current,harmonic suppression

Adaptive functions:harmonic blocking,CT ratio correction Adaptive overcurrent

Drawer structure:supports hot swappable maintenance

Waveform recording:up to 128 cycles captured

Event records:≥256 records

Clock synchronization:Built in IRIG-B support

Communication interface:RS-232,RS-485,RS-422,Ethernet 10BaseT

Protocol:Modbus RTU/TCP,DNP 3.0 Level 2

Environmental temperature:-40°C to+70°C

Relative humidity:≤90%without condensation

Installation size:Standard 19″/SR rack drawer

application area

SR745-W2-P1-G1-HI-A-L-R is widely used in the main/backup protection systems of small and large transformers,including substations,power plants,petrochemical/metallurgical industries,marine and railway traction transformers.With its comprehensive protection mechanism and flexible configuration capability,it can achieve compatibility between the main station and microgrid security,automation control system,and adapt to extreme on-site environments or situations without backup power operation and maintenance.Its drawer structure is suitable for 24/7 online monitoring,quick hot replacement,and reduces maintenance interruption time.

Related products

SR745-W2-P1-G1-LO-E:Low voltage version,enhanced LCD display,no high temperature rating.

SR745-W2-P5-G5-HI-A-L-R:Suitable for 5A CT input,three-phase dual winding system.

SR745-W2-P1-G1-HI-A-L-T:Enhanced Ethernet Communication Version.

The new generation replacement of GE SR845:745 has higher performance and support.

GE Multilin 735:Distribution line protection relay,can be used in conjunction with SR745.

GE SR745-W2-P1-G1-HI-A-L-R

Installation and maintenance

Preparation before installation:Before installing SR745-W2-P1-G1-HI-A-L-R,please ensure that the transformer has been powered off,and that the control power supply,current transformer(CT),voltage transformer(VT),and signal wiring are correct.Pre confirm that the rack support and grounding are good,and clean the cabinet to prevent dust.

Maintenance suggestion:It is recommended to perform a hot plug test every 12 months to verify the integrity of CT/VT wiring,and download event and waveform logs through EnerVista or MIMIC software to analyze harmonic/excitation behavior.Regularly check the LCD lights and keyboard operability to ensure sensitivity and reliability.In case of emergency failure,drawer style modules can be quickly replaced without stopping the machine,greatly improving on-site maintenance response speed.