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Overview
The GE Multilin SR745-W2-P5-G5-HI-A is a sophisticated numerical relay specifically engineered for the reliable protection of power transformers. It incorporates advanced algorithms for detecting internal and external faults, ensuring the security and stability of electrical power systems.

Key Features & Benefits:

• Advanced Differential Protection: Provides sensitive and secure percent-restrained differential protection for transformer internal faults, the primary protection for power transformers.

• Comprehensive Protection Suite: Includes backup protection functions such as overcurrent, restricted earth fault, overfluxing (V/Hz), and thermal overload protection.

• High-Accuracy Measurements: Offers precise monitoring of currents, voltages, power, power factor, and energy, with metering-class accuracy.

• Flexible Communications: Supports multiple communication protocols (DNP3, Modbus, IEC 61850) for seamless integration into SCADA and substation automation systems.

• Oscillography and Event Recording: Captures detailed fault records and event sequences for post-event analysis and system troubleshooting.

Technical Specifications:

• Product Series: Multilin SR 700 Series

• Protection Functions: Transformer differential, overcurrent, restricted earth fault, overfluxing, thermal overload, etc.

• Inputs: Multiple current and voltage inputs for three-phase systems.

• Communication Protocols: DNP3, Modbus, IEC 61850 (varying by configuration)

• Power Supply: Available in various DC or AC voltage ranges (as per suffix code)

• Standard Compliance: Meets relevant IEEE, IEC, and ANSI standards for protective relays.

Typical Applications:

• Protection of power transformers in electrical utility substations

• Transformer protection in industrial plants (steel, mining, oil & gas)

• Generator step-up (GSU) transformer protection

• Critical facility power systems (hospitals, data centers)