GE SR750-P5-G5-D5-HI-A1-R Feeder Management Relay | Replacement, Equivalent & Selection Guide
The GE SR750-P5-G5-D5-HI-A1-R is a fully numeric, microprocessor-based Feeder Management Relay from GE Grid Solutions (formerly GE Multilin). Designed for comprehensive feeder protection, monitoring, and control in medium-voltage distribution systems, this relay delivers high-accuracy metering, flexible I/O configuration, and robust communication capabilities. Konmask.com supplies genuine and compatible units with full traceability for industrial and utility applications.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | SR750-P5-G5-D5-HI-A1-R |
| Brand | GE Grid Solutions (GE Multilin) |
| Series | SR750 Feeder Management Relay |
| Rated Voltage Input | P5 = 100–240 V AC/DC power supply |
| CT Input | G5 = 5 A nominal current input |
| Digital I/O | D5 = Enhanced digital I/O module |
| Communications | HI = RS-485 + Ethernet (IEC 61850 / Modbus / DNP3) |
| Analog Output | A1 = 1 analog output module |
| Mounting | R = Rack / panel mount |
| Protection Functions | 50/51, 50N/51N, 46, 49, 27, 59, 81O/U, 67/67N, 79, 86 |
| Metering Accuracy | ±0.5% for current; ±1% for power |
| Operating Temperature | -40°C to +60°C |
| Weight | 7.54 kg |
| Standards | IEC 60255, IEEE C37.90, UL, CE |
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as replacements or functional equivalents for the SR750-P5-G5-D5-HI-A1-R. Always verify wiring, I/O count, and firmware compatibility before substitution.
| Model | Brand | Compatibility Notes |
|---|---|---|
| SR750-P5-G5-D5-HI-A1-R | GE Grid Solutions | Original — direct match |
| SR750-P5-G1-D5-HI-A1-R | GE Grid Solutions | 1 A CT input variant; verify CT ratio |
| SR750-P5-G5-D5-LO-A1-R | GE Grid Solutions | RS-485 only comms; no Ethernet |
| SEL-351S | Schweitzer Engineering | Functional equivalent; different comms protocol |
| Micom P142 | Schneider Electric | Feeder protection equivalent; IEC 61850 capable |
| REF615 | ABB | IEC 61850 feeder relay; verify I/O mapping |
| 7SJ85 | Siemens | SIPROTEC 5 series; advanced equivalent |
Contact Konmask.com for cross-reference verification and application engineering support.
Why Choose the Original Model
- Proven field reliability — SR750 series has 20+ years of deployment in utility and industrial feeders worldwide.
- Native IEC 61850 GOOSE messaging — seamless integration with modern substation automation systems.
- Flexible I/O architecture — modular design supports site-specific customization without hardware redesign.
- GE EnerVista software suite — unified configuration, commissioning, and event analysis platform.
- Wide temperature range — qualified for harsh industrial and outdoor panel environments.
Typical Applications
- Medium-voltage feeder protection in utility distribution substations
- Industrial plant feeder and motor feeder protection
- Overhead line and underground cable protection
- Recloser control and auto-restoration schemes
- Switchgear bay protection and control panels
- Renewable energy collection feeder protection (wind/solar farms)
System Compatibility
- Communication Protocols: IEC 61850 Ed.1/Ed.2, Modbus RTU/TCP, DNP3 (serial & LAN), IEC 60870-5-104
- SCADA Integration: Compatible with GE SCADA, OSIsoft PI, Wonderware, and third-party DCS/EMS platforms
- Software: GE EnerVista SR750 Setup (Windows 7/10/11); firmware upgradeable via USB
- Hardware Bus: Compatible with GE SR series expansion modules and existing SR750 panel cutouts
Selection Guide
Use the SR750 model code structure to select the correct variant for your application:
| Position | Code | Meaning |
|---|---|---|
| Power Supply | P5 | 100–240 V AC/DC universal supply |
| CT Input | G5 / G1 | 5 A nominal / 1 A nominal |
| Digital I/O | D5 | Enhanced I/O (10 inputs / 8 outputs) |
| Communications | HI / LO | Ethernet + RS-485 / RS-485 only |
| Analog Output | A1 | 1 × 4–20 mA analog output |
| Mounting | R | Rack / flush panel mount |
If your application requires 1 A CTs, select the G1 variant. For RS-485-only SCADA, select LO communications. Contact us if you need a custom I/O configuration.
Quality Assurance & Sourcing
- All units supplied by Konmask.com are sourced from authorized distributors or verified surplus channels.
- Each unit undergoes visual inspection and functional verification prior to shipment.
- Certificates of conformance and test reports available upon request.
- Genuine GE factory packaging preserved where applicable.
- Export compliance (EAR/ECCN) screening performed for international orders.
How to Order
- Confirm your exact model code: SR750-P5-G5-D5-HI-A1-R
- Verify CT ratio (5 A or 1 A) and power supply voltage at your site.
- Add to cart or contact support@konmask.com for bulk pricing and lead time.
- Provide your shipping address and preferred freight method (DHL / FedEx / sea freight).
- Receive order confirmation with tracking within 1 business day.
Replacement & Compatibility FAQ
Q: Can the SR750-P5-G5-D5-HI-A1-R replace an older SR750 with RS-485 only?
A: Yes. The HI variant is backward compatible with RS-485 Modbus/DNP3; the Ethernet port is simply unused.
Q: Is the SEL-351S a drop-in replacement?
A: Functionally equivalent for overcurrent protection, but wiring, I/O mapping, and configuration software differ. Engineering review required.
Q: Can I upgrade firmware on a used SR750?
A: Yes, via GE EnerVista software and USB. Ensure the firmware version matches your IEC 61850 SCL files.
Q: What is the lead time for a new unit?
A: Typically 3–7 business days for in-stock units. Contact us for current availability.
Q: Does Konmask.com provide installation support?
A: We provide documentation, wiring diagrams, and remote technical guidance. On-site commissioning can be arranged via our partner network.
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