Overview

The GE Multilin G30 Generator Protection System Relay provides comprehensive protection for steam, hydraulic, and combustion-turbine generators. It is especially effective when the generator and transformer share a common protection zone, offering coordinated differential and ancillary protective functions.

Built on GE’s proven Universal Relay (UR) platform, the G30 delivers advanced automation, flexible I/O configuration, and powerful disturbance recording capabilities. These features support fast troubleshooting, improved system visibility, and reduced downtime.

The configuration G30-V03-HKH-F8L-H6D-M8L-P6X-U6T-WXX represents a custom-assembled hardware and firmware option set, including communication interfaces, I/O banks, and specialized protection modules tailored for demanding industrial and utility environments.

Technical Data

Key Features

• Complete generator protection suite: differential, ground differential, loss-of-field, voltage, frequency, and overcurrent.

• IEC 61850, Modbus, DNP3 communication for seamless integration with SCADA, DCS, and substation automation systems.

• High-speed disturbance and event recording for forensic analysis and troubleshooting.

• Flexible I/O configuration supporting complex interlocking, control logic, and automation schemes.

• Wide operating temperature range (–40 °C to +70 °C) for harsh and outdoor environments.

• Modular UR platform allows tailored configuration to suit specific power system requirements.

Typical Applications

• Generator protection in small to medium-sized power generation plants.

• Combined generator–transformer protection zones requiring coordinated differential schemes.

• Industrial sites such as oil & gas, mining, petrochemical, and manufacturing facilities.

• Transmission and distribution substations using IEC 61850-based automation architectures.

FAQ

Q1: What is the primary function of the G30 relay?
It provides comprehensive generator protection including differential, overcurrent, voltage, frequency, and loss-of-field functions.

Q2: Is the G30 relay still in production?
Manufacturing has been discontinued, but the device remains widely deployed. Suitable replacements include:

• GE Multilin G60 Series

• GE/Alstom P343 or P345 Generator Protection Relays

Q3: Which communication protocols are supported?
The G30 supports IEC 61850, Modbus TCP/IP, DNP3, and RS-485, ensuring compatibility with modern SCADA and protection systems.

Q4: Can it operate in extreme industrial conditions?
Yes. It is designed for –40 °C to +70 °C, meeting requirements for outdoor and heavy-industrial environments.