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GE Multilin G60 Generator Protection System

The GE Multilin G60, also cataloged as the G60 Generator Protection System, operates as a dedicated hardware component for generator protection, measurement, automation, and fault recording within Universal Relay (UR) platforms. The unit executes electrical protection functions through CT, VT, I/O, and communication interfaces.

Hardware Specifications

Parameter	Specification
Model	G60
Brand	GE Multilin
Dimensions	19-inch rack mount, 4U height chassis
Protection Functions	Generator differential, stator earth fault, loss of field, volts per Hertz, reverse power, unbalanced current, distance, overcurrent, and frequency protection
Nominal Frequency	50 Hz / 60 Hz, frequency tracking range 3 Hz to 90 Hz
CT Secondary Inputs	1 A or 5 A nominal, software configurable per channel
VT Secondary Inputs	50 V to 240 V AC nominal phase-to-neutral
Power Supply Options	HI Range: 88-300 VDC / 88-265 VAC; LO Range: 24-48 VDC
Digital Inputs / Outputs	Scalable modular I/O cards with Form A, Form C, and SSR outputs
Analog Inputs	Optional RTD module with Pt100, Ni100, Cu10 and 4-20 mA transducer inputs
Communications	Dual redundant Ethernet ports, 10/100Base-T RJ45 or 100Base-FX Fiber LC/ST
Supported Protocols	IEC 61850 Ed. 1 and Ed. 2, Modbus RTU/TCP, DNP 3.0, IEC 60870-5-104, IEEE 1588
Event and Fault Recording	Oscillography up to 128 samples/cycle and Sequence of Events logging

Profinet and EtherNet/IP Deterministic Networks

The GE Multilin G60 uses modular industrial communication architecture with dual Ethernet interfaces for network integration. Communication services support IEC 61850, Modbus, DNP 3.0, IEC 60870-5-104, and IEEE 1588 time synchronization. The relay includes embedded synchrophasor measurement capability according to IEEE C37.118 and supports IEC 61850-90-5 synchrophasor multicast operation.

The device supports PRP network redundancy according to IEC 62439-3 to maintain communication continuity. Ethernet configuration includes RJ45 copper and fiber interface options for substation and generator control network installations.

Frequently Asked Questions

Q: What type of current transformer inputs are supported by the G60?
A: The G60 supports 1 A or 5 A nominal CT secondary inputs with software configuration available for each channel.

Q: Does the G60 support hot-swap replacement of protection modules?
A: The provided data does not specify hot-swap capability. Module replacement procedures must follow the GE Multilin installation manual and approved maintenance practices.

Q: What communication protocols are available for system integration?
A: The G60 supports IEC 61850 Ed. 1 and Ed. 2, Modbus RTU/TCP, DNP 3.0, IEC 60870-5-104, and IEEE 1588 time synchronization.

Field Installation Guidelines

Install the G60 in a compatible 19-inch rack or approved chassis arrangement with correct mechanical support. Verify CT and VT wiring polarity before energizing protection circuits.

Use shielded communication and signal cables according to site grounding practices. Connect cable shields at the designated grounding points to reduce electromagnetic interference. Separate low-level analog signal wiring from high-current power conductors to limit induced noise.

Confirm the selected power supply range before applying auxiliary voltage. Verify Ethernet fiber or copper communication connections, time synchronization wiring, and I/O terminal assignments during commissioning.

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