ABB RET316*4 HESG448750M2 Numerical Transformer Protection

Description

The ABB RET316*4 HESG448750M2 is a compact, modular digital relay designed for fast and selective protection of two- or three-winding power transformers. It supports advanced communication protocols and flexible logic configurations, making it ideal for utility and industrial power distribution systems.

Specifications

• Model: RET316*4 HESG448750M2

• Function: Transformer protection, control, measurement, and supervision

• Protection Types: Differential, overcurrent, overvoltage, thermal overload, distance, overexcitation, frequency, breaker failure

• Power Supply: 24 V DC

• Communication Protocols: IEC 61850, IEC 60870-5-103, Modbus®, DNP3, Profibus DPV1 (via SPA-ZC 302)

• Interfaces: 3 serial ports for local PC, station control system, and process bus

• Mounting Options: DIN rail, 19″ rack, surface or flush mounting

• Ingress Protection: IP20

• Operating Temperature: −20°C to +55°C

• Dimensions: 135 mm (H) × 67.5 mm (W) × 28 mm (D)

• Weight: 1.5 kg

Features

• Compact Modular Design: Space-saving footprint with detachable units for easy installation and maintenance

• Advanced Logic Functions: Multi-layer logic with timers, flip-flops, and custom schemes via PCM600 software

• Flexible Configuration: Eight predefined standard setups for various grounding applications

• High-Speed Fault Detection: Supports all-phase, earth, and interturn fault detection

• No Interposing CTs Required: Simplifies installation and reduces hardware complexity

• User Interface: Menu-driven CAP2/316 software for intuitive configuration

• Continuous Self-Monitoring: Built-in diagnostics for enhanced reliability

• Event Recording: Captures fault history and measurement data for analysis

• System Integration: Seamless communication with substation automation systems