Configured for comprehensive protection, autoreclosing control, and real-time monitoring of distribution feeders within electrical power systems, the GE Multilin 760-P5-G5-S5-HI-A20-R-T (760-P5-G5-S5-HI-A20-R-T Feeder Management Relay) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

• 760-P5-G5-S5-HI-A20-R-T: Advanced microprocessor-based feeder management relay variant featuring 5 A phase and zero-sequence current inputs, a sensitive ground current input, high-range auxiliary control power, eight analog output channels, an autoreclose package, a red breaker closed LED indicator, and an enhanced display interface.

Hardware Specifications

Profinet and Deterministic Network Processing

The internal digital signal processor executes high-speed sampling of feeder currents, voltages, and symmetrical components to evaluate overcurrent, distance, and directional protection elements within sub-cycle intervals. Communication interfaces support deterministic network protocol integration, enabling remote supervisory control, event record downloading, and sequence-of-events logging without interrupting primary protection functions. Hardware isolation barriers protect internal microelectronics from high-voltage transients and electromagnetic interference originating from substation switchyards.

Frequently Asked Questions

Q: Does this protective relay support live draw-out extraction while the auxiliary control power and current transformer inputs are energized?

A: Draw-out extraction is strictly restricted while the unit is energized; auxiliary supplies and current transformer shorting blocks must be fully secured before unlatching the chassis.

Q: How are the analog output channels scaled for external supervisory instrumentation?

A: The eight configurable 4 to 20 mA analog outputs can be mapped via front-panel programming to represent load currents, active power, reactive power, or frequency parameters.

Q: What mechanisms ensure secure breaker control during automated restoration sequences?

A: The integrated autoreclose logic coordinates multi-shot reclosing attempts with programmable dead times and reclaim timers, preventing lockouts on permanent faults.

Field Installation Guidelines

• Verify that all current transformer (CT) secondary circuits are short-circuited externally at test switches before servicing or withdrawing the relay from its draw-out case.
• Ensure that control power wiring and protective earth ground connections conform to substation standards to maintain noise immunity and personnel safety.
• Route communication cables and analog loop wiring through dedicated shielded conduits separated from high-voltage power leads.