GE F350OHCHF8FH6GM8FP6HCXXWXX Multilin 350 Feeder Protection Relay

Configured for feeder protection, metering, and breaker control in substation automation systems, the GE F350OHCHF8FH6GM8FP6HCXXWXX, also cataloged as the F350 feeder protection relay, provides direct physical and electrical execution across power distribution networks. The unit processes primary current transformer and voltage transformer inputs, executes protective algorithms, and drives tripping outputs for up to six distribution feeders (or five feeders when bus voltage monitoring is assigned). Physical interface connections handle direct digital I/O lines alongside station bus communications to ensure precise sub-cycle fault detection and isolation.

Suffix Breakdown & Model Matrix

Hardware Specifications

Deterministic Power System Communications

The GE Multilin 350 relay architecture uses deterministic backplane bus structures and Ethernet network interfaces to process critical fault data without queue delay. Integrated network hardware manages high-speed sampled values alongside event-driven GOOSE messages for peer-to-peer interlock logic across distribution switchgear. Internal hardware channels utilize dedicated digital signal processors to compute RMS current, voltage phase angles, and harmonic distortion profiles in real time. Flash memory registers isolate system event logs, fault waveforms, and sequence-of-events records, maintaining data integrity across auxiliary power interruptions.

Frequently Asked Questions

Q: What power supply range does the "H" configuration code accept?

A: The "H" power supply hardware module accepts high-voltage control power inputs spanning 110 to 250 VDC or 110 to 230 VAC at 50/60 Hz.

Q: How does bus voltage measurement affect maximum feeder capacity on the F350 relay?

A: When bus voltage monitoring is mapped to internal metering algorithms, available physical VT processing channels reduce total supported feeder monitoring lines from six down to five.

Q: Does the relay unit support hot-swapping during active feeder operation?

A: No, physical removal of terminal blocks or internal board modules requires complete isolation of CT/VT test blocks and de-energization of power input circuits to prevent open-circuit CT hazards and arc flash risks.

Field Installation Guidelines

Mount the chassis into a clean panel cutout inside an enclosure rated IP54 or higher. Secure all mounting brackets using standard hardware to prevent vibration loosening over time. Route low-voltage signaling and CT/VT wiring through distinct, separate conduit paths from high-voltage station power feeders to eliminate electromagnetic interference.

Establish a low-impedance ground connection from the chassis ground stud directly to the main switchboard ground bus using heavy gauge copper wire. Ensure all current transformer secondary leads pass through shorting-type test switches prior to terminal block connections. Verify that shielded communication lines are grounded at one single panel entry point to eliminate ground potential loops.