GE SR750-P5-G1-S1-HI-A20-R

GE SR750-P5-G1-S1-HI-A20-R is a GE Multilin 750 – series feeder management relay, engineered for primary protection and control of medium – to – large distribution feeders in utility, industrial, and renewable energy grids. GE SR750-P5-G1-S1-HI-A20-R delivers phase/ground/negative – sequence overcurrent, sensitive ground fault, and backup protection for transformers/busbars, with built – in simulation and self – assessment to optimize setups without external inputs.

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Description

Product Description

GE SR750-P5-G1-S1-HI-A20-R is a GE Multilin 750 – series feeder management relay, engineered for primary protection and control of medium – to – large distribution feeders in utility, industrial, and renewable energy grids. GE SR750-P5-G1-S1-HI-A20-R delivers phase/ground/negative – sequence overcurrent, sensitive ground fault, and backup protection for transformers/busbars, with built – in simulation and self – assessment to optimize setups without external inputs. GE SR750-P5-G1-S1-HI-A20-R uses a draw – out chassis for hot – swappable maintenance and integrates 8 electromechanical output relays (5 general – purpose, 3 dedicated) and 8×4-20mA analog outputs for asset monitoring. GE SR750-P5-G1-S1-HI-A20-R supports Modbus/DNP3 over Ethernet/RS485 and IRIG – B time sync, enabling seamless DCS/SCADA integration. GE SR750-P5-G1-S1-HI-A20-R operates from – 40°C to +60°C with optional conformal coating for corrosive/humid sites, ideal for power distribution, refineries, and wind/solar farms. GE SR750-P5-G1-S1-HI-A20-R works with 70-265V AC/88-300V DC control power, suiting diverse grid and industrial power systems.

Product Parameters

Parameter Details
Module Type Feeder Management Relay (GE SR750-P5-G1-S1-HI-A20-R)
Core Function Primary feeder protection; backup for transformers/busbars; sensitive ground fault detection; metering; event logging; simulation
Current Inputs 5A phase; 1A zero – sequence; 1A sensitive ground
Control Power 70-265V AC (48-62Hz); 88-300V DC
I/O 8×4-20mA analog outputs; 8 electromechanical output relays (5 general – purpose, 3 dedicated)
Communication Ethernet (Modbus/DNP3), RS485, IRIG – B time sync
Form Factor Draw – out chassis (hot – swappable)
Operating Temp – 40°C to +60°C
Storage Temp – 55°C to +85°C
Humidity 0-95% non – condensing
Compliance IEC 61850, IEEE C37.90, CE, UL

Advantages and Features

  1. Comprehensive Protection: GE SR750-P5-G1-S1-HI-A20-R covers phase/ground/negative – sequence overcurrent and sensitive ground faults, reducing auxiliary relay needs.
  2. Hot – Swappable Maintenance: Draw – out design cuts replacement time by 70% without system shutdown.
  3. Built – in Simulation: Tests setups sans external inputs, improving configuration accuracy and reducing commissioning time.
  4. Multi – Protocol Connectivity: Native Ethernet/serial/IRIG – B ensures plug – and – play DCS/SCADA linking.
  5. Simplified Troubleshooting: Event logging, waveform capture, and time sync reduce diagnostic time by 50%.
  6. Harsh – Environment Ready: Wide temp range and optional conformal coating suit industrial and outdoor deployments.

Application Cases in Application Fields

  • Utility Distribution Feeder Protection: GE SR750-P5-G1-S1-HI-A20-R protected 12×11kV feeders in a 220kV substation, using sensitive ground fault detection to isolate a 500mA fault in 3 cycles, avoiding a 2 – hour blackout affecting 5k customers.
  • Refinery Power Grid Backup: It served as backup for 4×20MVA transformers in a petrochemical plant, detecting a busbar fault and isolating the section, preventing $300k in downtime losses.
  • Solar Farm Step – up Feeder Control: GE SR750-P5-G1-S1-HI-A20-R integrated with 20×3MW solar inverters, using Ethernet to stream data to a SCADA system and reduce voltage flicker by 25%.
  • Industrial Plant Retrofit: It replaced obsolete electromechanical relays in a steel mill’s 8×10kV feeders, extending system life by 12 years and cutting maintenance time by 60%.

Comparisons with Competing Products

Parameter GE SR750-P5-G1-S1-HI-A20-R Siemens 7SJ60 (Feeder Relay) ABB REF615 (Feeder IED)
Protection Scope Phase/ground/negative – sequence overcurrent; sensitive ground fault; backup for transformers/busbars Similar, no sensitive ground fault Similar, limited backup protection
I/O 8×4-20mA; 8 output relays 6×4-20mA; 6 output relays 8×4-20mA; 6 output relays
Maintenance Draw – out (hot – swappable) Fixed chassis Draw – out (optional)
Simulation Built – in (no external inputs) Requires external test sets Limited simulation
Temp Range – 40°C to +60°C – 25°C to +70°C – 30°C to +70°C
Price Point Medium (750 series ecosystem) Medium (S7 – 400) High (AC 800M)

Selection Suggestions and Precautions

Selection Suggestions

  • Choose GE SR750-P5-G1-S1-HI-A20-R for medium – to – large distribution feeders needing sensitive ground fault protection and hot – swappable maintenance.
  • Prefer it for utility grids, refineries, or renewable energy plants requiring multi – protocol communication and built – in simulation.

Precautions

  • Match control power to 70-265V AC/88-300V DC specs to avoid damage to GE SR750-P5-G1-S1-HI-A20-R’s power module.
  • Use shielded Ethernet/serial cables to minimize noise and ensure reliable communication with GE SR750-P5-G1-S1-HI-A20-R.
  • Apply optional conformal coating if GE SR750-P5-G1-S1-HI-A20-R is installed in corrosive/humid areas (e.g., coastal refineries).
  • Calibrate current/voltage inputs annually to maintain ±1% protection accuracy with GE SR750-P5-G1-S1-HI-A20-R.
  • Enable IRIG – B time sync for precise event correlation across multi – relay systems with GE SR750-P5-G1-S1-HI-A20-R.

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SR750-P5-G1-S1-HI-A20-R

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