Product Overview

The GE Multilin 750-P5-G5-D5-HI-A1-R is a high-performance Feeder Management Relay engineered for the comprehensive protection, control, and monitoring of electrical distribution networks. As a member of the SR750 series, this microprocessor-based device integrates advanced protective logic with high-tier metering to safeguard feeders against overcurrent, ground faults, and sensitive earth leakage. By consolidating protection and substation automation functions into a single chassis, it provides a cost-effective solution for improving power system reliability. Its rugged design is specifically tailored to withstand the electromagnetic interference typically found in utility substations and heavy industrial power centers.

Hardware Specifications and Device Profile

• Model Identification 750-P5-G5-D5-HI-A1-R

• Core Function Feeder Management & Distribution Protection

• Current Inputs 5A Phase, 5A Ground, 5A Sensitive Ground (P5-G5-D5 configuration)

• Power Supply High-range Control Power (HI)

• Metering Precision Real-time tracking of Amps, Volts, Watts, Frequency, and Energy Consumption

• Oscillography High-speed AC waveform sampling for voltage and current transients

• Data Logging Programmable intervals for historical system performance trending

• Physical Mass 7.6 kg

• Device Dimensions 20.8 cm x 22.0 cm x 24.6 cm

• Mounting Standard 19-inch rack or panel cutout compatibility

• Origin USA

• Compliance Active product status within the GE Multilin SR family

Operational Use Cases and Deployment

The 750-P5-G5-D5-HI-A1-R relay is a cornerstone for modern power infrastructure management:

Substation Feeder ProtectionProviding primary or backup protection for medium-voltage feeders, utilizing sophisticated time-overcurrent curves and directional elements to isolate faults while maintaining system selectivity.

Fault Analysis and DiagnosticsLeveraging integrated oscillography and event recording to capture pre-fault and post-fault data, allowing protection engineers to reconstruct system disturbances and determine root causes with precision.

Industrial Power DistributionMonitoring large motor feeders or transformer primary circuits in chemical plants and refineries, where the sensitive ground input (D5) is essential for detecting low-level leakage before it escalates into a major fault.

Revenue-Grade Metering and Load ProfilingTracking energy usage and power quality metrics to optimize load shedding strategies or for internal cost-allocation within large manufacturing facilities.

Substation Automation IntegrationActing as an intelligent electronic device (IED) within a DCS or SCADA framework, providing real-time digital feedback on breaker status and feeder health through high-speed communication ports.