GE 750-P5-G5-S5-HI-A20-R Feeder Management Relay | Replacement, Equivalent & Selection Guide
The GE 750-P5-G5-S5-HI-A20-R is a high-performance Feeder Management Relay from GE Grid Solutions (formerly GE Multilin), engineered for comprehensive protection, control, and monitoring of medium-voltage feeder circuits. This page provides full technical specifications, compatible replacement models, application guidance, and sourcing information to help engineers and procurement teams make confident selection decisions.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | 750-P5-G5-S5-HI-A20-R |
| Brand / Manufacturer | GE Grid Solutions (GE Multilin) |
| Product Family | GE 750 Series Feeder Management Relay |
| Relay Type | Feeder Management / Protection Relay |
| Power Supply | AC/DC 20 (A20 option – wide-range auxiliary power) |
| Communications | RS-485 (S5 option); supports Modbus RTU / DNP3 |
| I/O Configuration | P5 (5 output relays), G5 (5 digital inputs) |
| High-Impedance Option | HI – High-Impedance Fault Detection |
| Mounting | Panel / Rack mount, 19-inch rack compatible |
| Protection Functions | Overcurrent (50/51), Ground Fault (50N/51N), Reclosing (79), Voltage (27/59), Frequency (81), Sync-check (25) |
| Metering | Voltage, Current, Power, Energy, Demand |
| Approvals | UL, CE, IEC 60255 |
| Weight | Approx. 360 g (relay module) |
Compatible Replacement & Equivalent Models
When the GE 750-P5-G5-S5-HI-A20-R is unavailable or end-of-life, the following models offer functional equivalence or direct drop-in replacement capability. Always verify firmware version, I/O count, and communication protocol before substitution.
| Model | Brand | Compatibility Notes |
|---|---|---|
| GE 750-P5-G5-S5-HI-A20-R (New / Refurbished) | GE Grid Solutions | Exact OEM replacement – preferred option |
| GE 760-P5-G5-S5-HI-A20-R | GE Grid Solutions | Next-generation 760 series; enhanced IEC 61850 support; same form factor |
| GE F60 Feeder Protection System | GE Grid Solutions | Advanced replacement with IEC 61850 GOOSE; requires I/O mapping review |
| SEL-351S Protection System | Schweitzer Engineering (SEL) | Functional equivalent; Modbus/DNP3 compatible; different wiring scheme |
| ABB REF615 | ABB | IEC 61850 native; suitable for MV feeder protection; panel re-engineering required |
| Schneider Electric Sepam Series 40 | Schneider Electric | Comparable protection functions; Modbus RTU; verify CT/VT ratios |
| Siemens 7SJ82 | Siemens | Overcurrent & earth-fault protection; IEC 61850 / Modbus; panel adaptation needed |
Note: Cross-brand replacements require engineering review of protection settings, CT/VT ratios, and communication configuration. Contact Konmask technical support for assistance.
Why Choose the Original Model
- Proven field reliability – Thousands of GE 750 series relays deployed globally in utility and industrial feeder applications.
- Exact settings compatibility – Retain existing protection settings files without re-engineering.
- Seamless SCADA integration – Native Modbus RTU and DNP3 support matches existing RTU/SCADA configurations.
- High-Impedance Fault Detection (HI) – Specialized option for detecting high-resistance ground faults on overhead distribution feeders.
- Minimal commissioning time – Drop-in replacement eliminates panel modification and re-wiring costs.
- OEM spare parts availability – GE Grid Solutions maintains long-term spare parts support for the 750 platform.
Typical Applications
- Medium-voltage feeder protection in utility distribution substations
- Industrial plant feeder circuits (petrochemical, mining, water treatment)
- Overhead distribution line protection with reclosing and sectionalizing
- High-impedance fault detection on ungrounded or resistance-grounded systems
- Feeder automation and SCADA-integrated protection schemes
- Renewable energy plant feeder protection (wind, solar collection systems)
System Compatibility
- Communication Protocols: Modbus RTU (RS-485), DNP3 Level 2
- SCADA Systems: Compatible with GE EnerVista, Wonderware, Ignition, and standard Modbus/DNP3 masters
- Software: GE EnerVista 750 Setup (settings, event records, oscillography)
- CT/VT Inputs: Standard 5A / 1A CT; 120V / 240V VT secondary
- Auxiliary Power: A20 option – 20–60 VDC / 20–48 VAC wide-range input
- Digital Inputs: G5 – 5 optically isolated digital inputs (wet contact)
- Output Relays: P5 – 5 Form-C output relays
Selection Guide
Use the following decision framework to confirm the GE 750-P5-G5-S5-HI-A20-R is the correct model for your application, or to identify the best alternative:
- Step 1 – Verify power supply voltage: Confirm auxiliary supply is 20–60 VDC or 20–48 VAC. If 110/220 VAC is required, select the A3 power supply option instead.
- Step 2 – Confirm I/O requirements: P5/G5 provides 5 outputs and 5 inputs. If more I/O is needed, consider the GE 760 series or F60 platform.
- Step 3 – Communication protocol: S5 option provides RS-485 Modbus/DNP3. For IEC 61850 Ethernet, upgrade to GE 760 or F60.
- Step 4 – High-impedance fault detection: HI option is required for ungrounded or high-resistance grounded systems. Omit if solidly grounded.
- Step 5 – Reclosing requirements: The 750 supports single-shot and multi-shot reclosing (79). Confirm reclose sequence with system protection engineer.
- Step 6 – Cross-brand replacement: If OEM unit is unavailable, consult the Compatible Replacement table above and contact Konmask for engineering support.
Quality Assurance & Sourcing
- Sourcing: Units sourced from authorized GE distributors, certified surplus channels, and factory-refurbished stock.
- Inspection: Each unit undergoes visual inspection, firmware version verification, and functional power-on testing prior to shipment.
- Warranty: 12-month warranty against manufacturing defects. Refurbished units carry a 6-month warranty.
- Traceability: Serial number and firmware version documented for every shipment.
- Packaging: Anti-static packaging with shock-absorbing foam; export carton available for international shipments.
- Lead Time: In-stock units ship within 1–3 business days. Special orders: 2–4 weeks.
How to Order
- Confirm the full model number: GE 750-P5-G5-S5-HI-A20-R
- Specify quantity and required delivery date.
- Add to cart and proceed to checkout, or contact us for bulk/project pricing.
- For cross-brand replacement inquiries, provide your existing relay model and protection settings summary.
- International orders: provide import country and HS code requirements for customs documentation.
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Replacement & Compatibility FAQ
Q: Is the GE 750-P5-G5-S5-HI-A20-R still in production?
A: The GE 750 series has been superseded by the GE 760 platform. New OEM units may have limited availability; refurbished and surplus stock is available through Konmask.
Q: Can I replace the 750 with a GE 760 without rewiring?
A: The GE 760 shares the same form factor and terminal layout as the 750, making it a near drop-in replacement. Settings migration using EnerVista software is required.
Q: What does the HI option provide?
A: The High-Impedance (HI) option enables detection of high-resistance ground faults (e.g., downed conductors on dry soil) that standard overcurrent elements cannot detect.
Q: Can the 750 communicate with modern SCADA systems?
A: Yes. The S5 RS-485 port supports Modbus RTU and DNP3, which are compatible with virtually all modern SCADA and DMS platforms via serial or RS-485-to-Ethernet converters.
Q: Do you provide settings files or commissioning support?
A: Konmask can provide EnerVista settings file templates and connect you with qualified protection engineers for commissioning support. Contact us for details.
Q: What is the difference between A20 and A3 power supply options?
A: A20 accepts 20–60 VDC / 20–48 VAC (low-voltage DC substation battery systems). A3 accepts 100–240 VAC / 100–250 VDC (standard AC panel supply). Select based on your substation battery voltage.
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