Description

GE Multilin F35-N03-HCH-TF8-FH6-EM8-HP6-EU8-HW6-E Multiple Feeder Protection System

The GE Multilin F35-N03-HCH-TF8-FH6-EM8-HP6-EU8-HW6-E, also cataloged as the F35 Multiple Feeder Protection System, operates as a dedicated hardware component for feeder protection, control, measurement, and communication within GE Multilin Universal Relay (UR) platforms.

Hardware Specifications

Parameter	Specification
Model	F35-N03-HCH-TF8-FH6-EM8-HP6-EU8-HW6-E
Brand	GE Multilin
Origin	General Electric Universal Relay (UR) family
Operating Temp	-40 deg C to +60 deg C
Power Consumption	Approximately 15-30 W nominal, up to 45 W depending on installed I/O modules
Power Supply	125-250 V DC / 100-240 V AC nominal, operational range 88-300 V DC / 88-265 V AC
Feeder Capacity	Up to five feeders with busbar voltage measurement or up to six feeders without busbar voltage measurement
Current Inputs	4 CT inputs, 1 A / 5 A selectable
Voltage Inputs	4 VT inputs, 50-240 V AC nominal phase-to-neutral
Communication Ports	RS485, Ethernet interfaces (RJ45 or fiber depending on CPU option)
Communication Protocols	Modbus RTU, Modbus TCP/IP, DNP 3.0, IEC 61850 GOOSE/MMS optional
Protection Functions	50P/51P, 50N/51N, 50G/51G, 49, 27/59, 81U/81O
Environmental Coating	Conformal coating for harsh environment operation

Profinet / EtherNet-IP Deterministic Network and Firmware Compatibility

The GE Multilin F35 uses a modular Universal Relay hardware structure with CPU-based processing, configurable I/O expansion, and communication interfaces. The relay architecture supports high-speed Ethernet communication functions through installed communication modules, enabling deterministic data exchange for protection monitoring, event reporting, and substation automation systems.

The F35 firmware platform provides compatibility management for configured hardware modules, including CT/VT acquisition boards, digital I/O assemblies, and communication interfaces. Module configuration, FlexLogic programming, and firmware revision control define the operational behavior of the protection system.

Frequently Asked Questions

Q: Can the F35 support hot-swap replacement of installed modules?
A: The F35 uses a modular architecture; however, module replacement procedures must follow GE Multilin maintenance requirements. Power isolation and configuration verification are required before removing or installing hardware assemblies.

Q: What is the function of the CT/VT input modules in the F35 configuration?
A: CT/VT modules provide analog current and voltage acquisition for feeder protection elements, metering calculations, fault recording, and protection algorithm execution.

Q: Which communication protocols are available on the F35 relay?
A: The F35 supports Modbus RTU, Modbus TCP/IP, DNP 3.0 serial/TCP communication, and optional IEC 61850 GOOSE and MMS functions depending on installed communication options.

Field Installation Guidelines

• Install the relay in a suitable protection panel with adequate mechanical support and environmental protection.
• Route CT and VT wiring separately from high-energy power conductors to reduce electromagnetic interference.
• Connect CT secondary circuits using correct polarity and approved shorting practices during maintenance activities.
• Apply shielded communication cables where required and terminate shields according to site grounding standards.
• Verify auxiliary supply voltage before energizing the relay. Confirm the installed power supply module matches the system voltage.
• Check terminal tightness, module seating, and rear communication connections before commissioning.
• Perform configuration verification after installation, including CT/VT ratios, digital input assignments, output relay logic, and communication addressing.

Specifications

• Brand: General Electric

Advantages

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