GE 750-P5-G1-S5-HI-A20-R-E-H Motor Protection Relay
Manufacturer: GE Fanuc
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Part Number: 750-P5-G1-S5-HI-A20-R-E-H
Condition：New with Original Package
Product Type: Motor Protection and Control Relay
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Overview
The 750-P5-G1-S5-HI-A20-R-E-H is an authoritative Motor Protection Relay from the GE Multilin 750 Series. This module is a mechanical necessity for the comprehensive protection and management of medium-to-large horsepower motors. By integrating advanced thermal modeling, overcurrent protection, and power quality monitoring into a single industrial-grade chassis, it ensures deterministic motor operation under the most demanding utility and industrial conditions. The SR750 series is specifically engineered to prevent catastrophic motor failure due to electrical faults or mechanical overloads, making it a trustworthy standard in refineries, mining operations, and power generation plants.
Detailed Technical Specifications
| Attribute | Details |
| Manufacturer | GE Multilin / General Electric |
| Full Model Number | 750-P5-G1-S5-HI-A20-R-E-H |
| Series | 750 Motor Protection System |
| Current Inputs (P5) | 5 A Phase CT Secondaries |
| Ground Inputs (G1) | 1 A Ground CT Secondary |
| Sensitive Ground (S5) | 5 A Sensitive Ground CT Secondary |
| Control Power (HI) | 88–300 VDC / 70–265 VAC (High Range) |
| Analog Outputs (A20) | 4 Isolated 4–20 mA Analog Outputs |
| Environmental (H) | Harsh Environment Conformal Coating |
| Display (R) | Enhanced Front Panel / Redundant Option Support |
| Primary Function | Advanced Thermal Modeling & Fault Protection |
| Communication | RS-485, RS-232, Modbus RTU (Ethernet Optional) |
| Operating Temp | -40 °C to +70 °C (-40 °F to 158 °F) |
| Weight | 2.0 kg |
Engineering and Operational Guidelines
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Thermal Modeling Expertise: The 750-P5-G1-S5-HI-A20-R-E-H features a sophisticated thermal algorithm that accounts for stator and rotor heating. This expertise allows the relay to maximize motor utilization without crossing the damage curve, even during frequent start/stop cycles.
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Harsh Environment Logic: The "H" suffix in this model indicates the inclusion of industrial-grade conformal coating on the PCBs. This is a mechanical necessity for installations in refineries or mining sites where hydrogen sulfide (H2S), humidity, and dust could otherwise lead to premature electronic failure.
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Authoritative Diagnostics: Integrated oscillography and event recording hardware capture high-resolution data during trips. This allows protection engineers to conduct root cause analysis for locked rotor conditions, phase unbalance, or ground faults with precision.
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System Integration: Supporting DNP 3.0 and Modbus protocols, the relay serves as a communication gateway. It provides real-time motor health data to SCADA systems, enabling predictive maintenance strategies and reducing unplanned downtime.
Technical FAQ
Q: What does the "HI" designation mean for the power supply?
A: The HI designation represents a high-range power supply capable of accepting 88–300 VDC or 70–265 VAC. This provides flexibility across various substation battery systems and AC auxiliary power sources.
Q: Can this model be used in environments with corrosive gases?
A: Yes. This specific model includes the "H" option, meaning it is treated for harsh environments, providing superior protection against corrosion and atmospheric contaminants compared to standard models.
Q: How does the "S5" sensitive ground input improve safety?
A: The S5 input allows for the detection of very low-level ground leakage currents. This is critical for high-impedance grounded systems where a standard ground CT might not detect a localized insulation breakdown before it evolves into a major fault.