ABB RET316*4 HESG448750M2 Numerical Transformer Protection

Overview

The ABB RET3164 HESG448750M2 is a numerical relay designed for fast, selective protection of two- or three-winding power transformers. It also supports autotransformers and generator-transformer block units. Widely used in utility and industrial power distribution, it ensures reliable transformer protection, control, measurement, and supervision.

Technical Specifications

Function: Transformer protection, control, measurement, and supervision
Protection Types: Differential, overcurrent, overvoltage, thermal overload, distance, overexcitation, frequency, breaker failure
Communication Protocols: IEC 61850, IEC 60870-5-103, Modbus®, DNP3, Profibus DPV1 (via SPA-ZC 302)
Interfaces: 3 serial ports (local PC, station control system, process bus)
Mounting Options: 19″ rack, surface, or flush mounting
Ingress Protection: IP20
Logic Functions: Multi-layer logic with timers, flip-flops, and custom schemes via PCM600 software
User Interface: Menu-driven CAP2/316 software (Windows-based)
Power Supply: 24 V DC
Operating Temperature: −20°C to +55°C
Dimensions: 135 mm (H) × 67.5 mm (W) × 28 mm (D)
Weight: 1.5 kg