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GE SR745 series 745-W2-P51-G1-HI-A transformer relay
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GE SR745 series 745-W2-P51-G1-HI-A transformer relay

The GE SR745-W2-P51-G1-HI-A Relay is a high-performance industrial control relay designed for precise switching applications in demanding environments.
U.S.＄19286.00
U.S.＄15636.00
U.S.＄14854.20
U.S.＄14541.48
Weight：1.280KG
Quantity：
(Inventory: 3)
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Description
The GE SR745-W2-P51-G1-HI-A Relay is a high-performance industrial control relay designed for precise switching applications in demanding environments.

GE SR745-W2-P51-G1-HI-A is a multifunctional transformer protection relay, belonging to SR 745 series, which is specially used for differential and backup protection of power transformers, reactors and grounding transformers, and is suitable for medium and high voltage power systems (6.6kV~765kV).

Core function

Differential protection (87T)


Harmonic braking technology (2nd/5th harmonic suppression) is adopted to avoid misoperation of inrush current.

Support proportional braking characteristics, adjustable sensitivity (slope 10%~50%).

Backup protection


Overcurrent (50/51), zero sequence (50N/51N) and overload (49) protection.

Non-electric quantity protection (such as gas/oil temperature alarm, external signal is required).

Advanced monitoring


Real-time display of three-phase current, differential current and harmonic content (THD).

Fault recording (128 cycles) and event recording (1000).

Communication and integration


Protocol: IEC 61850 Ed.2, Modbus TCP, DNP3.0.

Interface: dual Ethernet (RJ45), RS485, supporting EnerVista SR7 software configuration.

technical parameter

Parameter specification

Input range current: 1A/5A(CT), voltage: 57.7V/120V(VT).

Action time ≤ 20 ms (differential protection)

Power supply 48-250VDC/100-240VAC

Certification standards IEC 60255, IEEE C37.90, UL 508


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