Description

GE SR745-W2-P1-G1-HI-A-L-R-E belongs to the GE Multilin 745 series and is designed to provide high reliability protection management for dual winding transformers.In the model,”W2″represents a dual winding configuration,”P1″represents 1 A CT input,”G1″represents advanced functionality,”HI”supports industrial grade power supply,”A”contains analog I/O,”L”refers to enhanced display,”R”means drawer mounted,and”E”means with enhanced LCD.

This relay integrates multiple protection functions such as current differential,zero sequence/phase to phase overcurrent,ground fault,overexcitation(V/Hz),overvoltage/undervoltage frequency,excitation failure,etc.It also supports advanced functions such as harmonic blocking,adaptive overcurrent protection,CT ratio correction,and asset life assessment.

The drawer style rack structure allows for hot swapping operations,greatly improving on-site maintenance efficiency;Enhancing the LCD and keyboard interface has improved the user experience;Supports IRIG-B precise clock synchronization,256 event records,and 128 cycle waveform capture,with powerful fault diagnosis capabilities;Equipped with RS-232,RS-485,RS-422,Ethernet interfaces,compatible with Modbus RTU/TCP and DNP 3.0,achieving centralized monitoring and intelligent operation and maintenance.

GE SR745‑W2‑P1‑G1‑HI‑A‑L‑R‑E

Main features and advantages

Comprehensive protection coverage:

Multiple protection strategies are available,including variable differential,grounding/phase to phase overcurrent,excitation failure,and overexcitation(V/Hz).

FlexLogic programming is flexible:

No need for external PLC,through built-in FlexLogic™Customized control solutions can be implemented to enhance system responsiveness.

Asset life management:

Support temperature/harmonic monitoring,age factor calculation,and loss of life assessment functions to assist in asset health management.

Outstanding maintenance efficiency:

Drawer structure+hot swappable design,reducing fault response time and minimizing the impact of power outages.

Improve communication interface:

Supports multiple protocols(Modbus/DNP),with Ethernet interface for easy integration of SCADA and DCS systems.

Strong adaptability to the environment:

Support-40°C to+70°C,humidity≤90%,drawer shell dustproof and moisture-proof,suitable for various industrial sites.

technical specifications

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

Manufacturer:GE Multilin(GE Vernova)

Product type:Transformer Protection Relay

Number of windings:W2=double winding

CT secondary input:P1=1A

Function level:G1=Advanced Function Edition

Control power supply:HI=90-300 V DC/70-265 V AC

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

Display interface:L=Enhanced LCD+Keyboard

Installation method:R=drawer rack installation

Enhanced model:E=Enhanced LCD

Protection functions:differential,overexcitation,overvoltage/undervoltage/frequency,overcurrent,harmonic suppression

Communication interface:RS-232/485/422,Ethernet 10Base-T

Supported protocols:Modbus RTU/TCP,DNP 3.0

Event records:≥256 records

Waveform recording:up to 128 cycles

Synchronization:IRIG-B

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

Humidity:≤90%without condensation

Drawer hot swappable:Supports

Compliant with standards:IEEE/ANSI,IEC

application area

SR745-W2-P1-G1-HI-A-L-R-E is mainly suitable for primary/backup protection of substations,power plants,large or double winding power transformers,as well as for distribution,industrial plant transformers,and critical infrastructure.Its comprehensive protection strategy and asset management capabilities are suitable for various types such as dry-type,oil immersed,and autotransformers,especially for industrial environments with high reliability and strong online maintenance requirements.

Related products

SR745-W2-P1-G1-LO-E:Low voltage control power supply version,including enhanced LCD.

SR745-W2-P5-G5-HI-A-L-R-E:Supports 5 A CT input and is compatible with higher current systems.

SR745-W2-P1-G1-HI-A-L-R-T:with Ethernet(T)interface version.

GE SR845:745 series upgrade,providing more advanced performance.

GE Multilin 735:Distribution line protection relay,suitable for supporting extended use.

GE SR745‑W2‑P1‑G1‑HI‑A‑L‑R‑E

Installation and maintenance

Preparation before installation:Ensure that the control power supply,current transformer,and signal wiring are correct,and that the transformer has been powered off.Tighten the CT/VT terminals to ensure good grounding of the drawer cabinet and that the temperature environment meets the equipment requirements.

Maintenance suggestion:It is recommended to conduct hot plug verification annually to check the accuracy of analog input/output,export event and waveform records using EnerVista or MIMIC software,and analyze operating trends and anomalies.Regularly check the LCD display,keyboard key sensitivity,and housing sealing condition to ensure the reliability of the drawer structure.