Description
The GE Multilin 750-P5-G5-S5-H1-A20-R-E is a micro-processor based digital protection relay designed for the comprehensive management, protection, and monitoring of distribution feeders. This specific model configuration integrates into sub-transmission and distribution networks to handle overcurrent, voltage, and frequency anomalies.
Commercial Availability & Procurement
- Inventory Status: Available
- Standard Shipping Lead Time: 2 to 3 business days from order confirmation
- Condition Verification: New Surplus (Original Factory Box with Factory Test Report)
- Warranty Period: 12-Month Supplier Warranty
- Pricing Note: The market value of industrial protection relays fluctuates based on regional supply levels and specific component availability. The listed price serves as a baseline configuration reference. Contact our international trade desk directly for a formal, time-gated proforma invoice.
Part Number Code Breakdown & Specifications
Understanding the exact suffix structure is vital to ensure drop-in engineering compatibility. Here is how this specific alphanumeric code breaks down based on the GE Multilin 750 series matrix:
| Model Code Segment | Specific Variable | Engineering Value / Functional Meaning |
| 750 | Base Series | Feeder Management System Architecture |
| P5 | Phase Current Inputs | 5 A Phase Current Transformers |
| G5 | Ground Current Input | 5 A Ground Current Transformer |
| S5 | Sensitive Ground Input | 5 A Sensitive Ground Current Input |
| H1 | Control Power Supply | High Voltage Range: 90 to 300 V DC / 70 to 265 V AC |
| A20 | Analog I/O Configuration | 8 Analog Inputs (4 to 20 mA) / 4 Analog Outputs (4 to 20 mA) |
| R | Enhanced Reliability | Enhanced Conformal Coating on Internal PCB Assemblies |
| E | Display Type | Enhanced Front Panel Interface with Character LCD |
Field Engineering & Commissioning Insights
Hardware swap-outs require close attention to CT shorting blocks. In my experience retrofitting older substation line bays, technicians occasionally forget that disconnecting a live 5 A current transformer circuit generates lethal open-circuit voltages. Always ensure the external shorting bar is completely locked down before sliding the 750 drawing chassis out of its housing.
The “R” suffix in this model indicates internal conformal coating. Don’t underestimate this environmental protection; on a recent project at a coastal wastewater treatment plant, non-coated units suffered trace oxidation within 18 months, whereas coated units remained fully operational despite ambient sulfur dioxide exposure.
When programming the overcurrent curves (typically compliant with ANSI, IAC, or IEC 60255 standards), make sure your firmware tool matches the boot code version of the relay. Well, technically EnerVista 750 software will talk to older firmware, but attempting to upload an incompatible .750 settings file can corrupt the calibration registers. Always pull the existing site file and save it as a backup first.
Global Logistics & Cross-Border Compliance
Our global supply chain network facilitates the transit of specialized electrical grid infrastructure components across international borders daily. We handle all export documentation required to clear customs in North America, Europe, the Middle East, and Asia-Pacific regions.
Each relay package is dispatched inside heavy-duty anti-static packaging accompanied by its corresponding harmonized tariff system (HTS) code for power distribution apparatus. Standard shipping options include priority air freight for urgent plant-down scenarios, alongside economical deferred freight schedules for planned capital projects. Tracking logs are updated continuously from port of departure to point of delivery.
