Description

GE Multilin C30 Controller Management Relay

Configured for substation bay control and power system management in Universal Relay (UR) platforms, the GE Multilin C30 (C30 Controller Management Relay) provides direct physical and electrical execution of breaker control, monitoring, protection logic, and IEC 61850 communication functions.

Hardware Specifications

Parameter	Specification
Model	C30
Brand	GE Multilin
Origin	General Electric Universal Relay (UR) Series
Operating Temp	-40 deg C to +60 deg C
Power Supply	24-48 V DC or 88-300 V DC / 88-264 V AC
Current Inputs	CT inputs: 1 A or 5 A secondary, dual CT rated, 1x to 40x nominal range
Voltage Inputs	VT inputs configurable from 50 V to 240 V AC secondary
Digital Inputs	Modular inputs with configurable threshold voltage from 24 V DC to 250 V DC
Output Relays	Form A, Form C, high-speed Form A trip outputs
Analog I/O	Optional 4-20 mA DC inputs and outputs
Communication Ports	Up to 3 redundant Ethernet ports, RS232, USB
Ethernet Interface	100Base-TX RJ45 or 100Base-FX fiber optic ST/LC connectors
Protection Functions	50P/51P, 50N/51N, 27/59, 81U/81O, 50BF, 25, 79
Protection Accuracy	Voltage and current metering Class 0.2; power and energy metering better than 0.5%

Profinet / EtherNet-IP Deterministic Networks and Firmware Compatibility

The GE Multilin C30 integrates programmable control through the FlexLogic engine and supports deterministic communication architectures through IEC 61850, DNP 3.0, Modbus, and IEC 60870 protocols. The controller executes configurable interlock sequences, breaker failure logic, autoreclose routines, and bay switching operations without requiring an external PLC.

The Ethernet communication subsystem supports redundant network configurations with IEC 61850 Edition 1 and Edition 2 station bus and process bus operation. GOOSE messaging provides high-speed peer-to-peer signal exchange for breaker control and substation automation applications.

The relay firmware environment supports configurable protection logic, event recording, oscillography, and communication parameter management. Firmware compatibility shall be verified against the installed hardware revision and application configuration before upgrade procedures.

Frequently Asked Questions

Q: Does the GE Multilin C30 support hot-swap replacement of hardware modules?
A: The C30 modular architecture allows field replacement of supported hardware modules according to GE Multilin maintenance procedures. Hot-swap capability depends on the installed module type and system configuration.

Q: What communication protocols are supported by the C30 relay?
A: The relay supports IEC 61850 GOOSE and MMS, DNP 3.0 serial and TCP/IP, Modbus RTU, Modbus TCP, IEC 60870-5-103, IEC 60870-5-104, IEEE 1588 PTP, and SNTP time synchronization.

Q: What are the available power supply ranges for the C30?
A: Available power supply options include 24-48 V DC and high-range supplies rated for 88-300 V DC or 88-264 V AC.

Field Installation Guidelines

• Install the relay in a standard 19-inch rack enclosure with sufficient clearance for rear wiring and communication connections.
• Connect CT and VT circuits according to the approved protection system wiring diagram and verify polarity before commissioning.
• Separate low-level communication wiring from high-current power conductors to reduce electrical interference.
• Apply shield grounding practices according to the site EMC requirements, with cable shields terminated using approved grounding methods.
• Verify Ethernet fiber or copper connections for correct connector type, network topology, and communication parameters.
• Confirm digital input voltage thresholds before connecting external control circuits.
• Check auxiliary power polarity and grounding before energizing the relay.
• Validate protection settings, FlexLogic equations, and communication mapping before placing the relay into service.

Specifications

• Brand: General Electric

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems