Woodward HighPROTEC MCDGV4-2B0ACA Generator Relay

Product Description

Overview

The MCDGV4-2B0ACA from Woodward’s HighPROTEC MCDGV4 series is a high-precision digital generator differential protection relay designed for medium and high-power synchronous generators.
It provides comprehensive unit and block protection, including optional integration of the step-up transformer within the protection zone.

Developed by Woodward Kempen GmbH in Germany, this relay combines advanced differential algorithms with extensive generator-specific protection functions, making it suitable for utility-grade and industrial power generation systems.

Protection Functions and Capabilities

The MCDGV4-2B0ACA delivers full generator protection coverage using high-speed digital signal processing and configurable logic.

Supported protection functions include:

• Phase differential protection

• Earth (ground) differential protection

• Overvoltage and undervoltage protection (59 / 27)

• Overfrequency and underfrequency protection (81O / 81U)

• Reverse power protection (32)

• Loss of excitation protection (40)

• Overfluxing protection (24)

• Thermal overload protection (49)

• Synchronism check (25)

• Directional reactive power protection

This wide protection scope allows the relay to replace multiple conventional protection devices in a single compact unit.

Technical Specifications

• Protection type: Generator differential and unit protection relay

• CT inputs: Multiple phase and earth CT inputs (1 A / 5 A configurable)

• VT inputs: Voltage measurement up to 800 V (phase-to-phase)

• Auxiliary supply: 24–250 VDC or 85–265 VAC

• Digital inputs: Up to 8 configurable digital inputs

• Relay outputs: Up to 11 programmable output relays

• Analog inputs: 2

• Analog outputs: 2

• Temperature inputs: RTD support (configuration-dependent)

• Communication protocols:

• IEC 61850

• Modbus RTU

• Modbus TCP

• DNP3.0 TCP / UDP

• IEC 60870-5-103

• Communication interfaces: Ethernet RJ45, RS-485

• Event recording: Disturbance recorder, fault recorder, SOE logging

• User interface: LCD display with keypad

• Engineering software: SmartView SE

• Operating temperature: –25 °C to +70 °C

• Storage temperature: –40 °C to +85 °C

• Mounting: Panel or door mounting

• Compliance: CE, IEC, EN standards for generator protection relays