GE SR750‑P1‑G1‑S1‑HI‑A20‑G Feeder Management Relay

Technical Specifications

Model: SR750‑P1‑G1‑S1‑HI‑A20‑G

Brand: GE Multilin (GE Vernova)

Product Type: Digital Feeder Management Protection Relay

Applicable System: Medium‑voltage distribution feeder, industrial power‑supply system, substation outgoing‑line protection system

CT Secondary Input: 1A phase current transformer input(P1)

Ground CT Input: 1A ground fault current input(G1)

Sensitive Ground CT Input: 1A sensitive ground‑fault current input(S1)

Control Power: 70‑265VAC / 90‑300VDC universal high‑range power supply(HI), 48‑62Hz

Analog Output: 8‑channel configurable 4‑20mA analog output(A20)

Hardware Option: G‑version hardware configuration(G)

Voltage Input: Three‑phase AC voltage sampling input

Communication Interface: Front‑panel RS232 local programming port, rear‑side RS485/RS422 communication port, supports Modbus RTU, DNP3.0

Display: 40‑character multi‑line LCD liquid‑crystal display with keypad

Mounting Mode: Panel flush mounting

Front‑panel Protection Grade: IP54

Digital Input: 8‑channel opto‑isolated programmable digital input

Relay Output: 8 groups of programmable trip, alarm and control relay outputs

Recording Function: Multi‑group event log, fault waveform capture, disturbance recording, breaker operation‑count record

Logic Function: Flexible programmable logic function, supports 4‑group setting‑group storage

Power Consumption: Typical 32VA

Operating Temperature:‑40℃ ~ +70℃, non‑condensing

Humidity:5%‑95% non‑condensing

Weight:4.4kg

Dimension:178mm ×228mm ×114mm

Application: Substation medium‑voltage outgoing feeder, factory power distribution system, petrochemical plant, mine power‑supply, utility power‑grid feeder protection and monitoring

Product Function Description

SR750‑P1‑G1‑S1‑HI‑A20‑G belongs to GE Multilin 750 series feeder management relay, specially developed for medium‑voltage distribution feeders. This relay integrates complete feeder‑oriented protection, measurement, control, fault‑recording and breaker‑monitoring functions. It provides phase overcurrent protection, directional overcurrent, sensitive ground‑fault protection, breaker‑failure protection, thermal overload protection, over‑voltage/under‑voltage protection, over‑frequency/under‑frequency protection for distribution feeders.

It can real‑time collect current, voltage, power, power‑factor, electric‑energy and other operating parameters. Built‑in disturbance‑recorder captures complete fault waveforms and stores time‑stamped event logs, helping maintenance personnel quickly locate fault points and shorten power‑failure processing time. A20 configuration provides eight 4‑20mA configurable analog output channels, which upload key feeder operating data to upper‑level DCS/SCADA system. Local LCD keypad supports parameter setting, status checking and fault diagnosis. It supports multiple communication protocols to realize remote monitoring and remote setting modification by host system. Flexible programmable logic can realize customized interlocking and control logic according to on‑site requirements.

Product Details

Panel‑mount draw‑out integrated structure, convenient for on‑site replacement and maintenance. Industrial‑grade hardware design adapts to complex substation and industrial‑site electromagnetic‑interference environment. This legacy feeder‑management relay has been discontinued by original manufacturer, mainly used for old‑equipment overhaul and spare‑part replacement. Please confirm CT ratio, power‑supply range and communication parameters before commissioning. Strict ESD protection shall be adopted during installation.