GE 735-5-5-HI-485 Feeder Protection Relay

The GE Multilin 735-5-5-HI-485, also cataloged as the SR73555HI485 Feeder Protection Relay, operates as a dedicated hardware component for electrical system monitoring and overcurrent protection within industrial power networks. It processes secondary current vectors natively at the switchgear tier to execute direct physical breaking commands and trip logic sequences parallel to master control network platforms.

Hardware Specifications

Industrial Control & Drive Integration

• Backplane Bus Communication Velocity Licences and Relay Interlocking: The internal protection engine runs protective algorithms and trip logic parameters independently. By computing curves and phase shifts locally, it guarantees that high-speed fault calculations execute instantly without altering backplane bus communication velocity properties assigned to auxiliary serial monitoring loops.
• Profinet / EtherNet/IP Deterministic Networks Mapping: Real-time currents, fault timestamps, and trip state flags are gathered by the local processor. Through external gateway blocks, these serial Modbus registers map straight into supervisory Profinet / EtherNet/IP deterministic networks, enabling main control rooms to line up power system logs across the facility.
• I/O Density Scaling and Breaker Control Optimization: Incorporating phase overcurrent (50/51) and ground fault (50G/51G) elements into a heavy-duty 11.79 lbs drawout chassis optimizes panel layout footprints. This standalone configuration streamlines I/O density scaling inside switchgear enclosures by eliminating the need for separate discrete metering instruments and timing relays.

Frequently Asked Questions

Q: What technical processing behavior manifests if the 2-wire RS485 communication line experiences an unexpected open circuit during monitoring?

A: The internal protective algorithms continue to run at full speed without modification. The device operates as a completely autonomous protection node, pulling current data and executing trip commands via its hardwired output contacts while setting an offline fault flag across the serial link.

Q: Can this 11.79 lbs protection relay assembly be drawn out or hot-swapped while the primary feeder line is actively carrying high-voltage current?

A: Yes, provided the matching cradle features integrated, automatic current transformer (CT) shorting bars. The drawout chassis structure is designed to short-circuit the 5 A phase and ground CT secondary loops automatically upon extraction, preventing high-voltage inductive spikes across open CT terminals while the main power line remains active.