Description
Product Name : 750-P5-G5-D5-HI-A20-R GE Input module
Product details:
The GE Multilin 750 is a microprocessor-based digital protection and management relay designed to safeguard, monitor, and control distribution feeders, transformers, and power transmission lines.
Model Breakdown: 750-P5-G5-D5-HI-A20-R
750: Base Relay Series (Feeder Management Relay)P5: Phase Current Inputs = 5 AG5: Ground / Zero-Sequence Current Inputs = 5 AD5: Sensitive Ground Current Input = 5 AHI: High Control Power Supply (88–300 VDC / 70–265 VAC @ 48–62 Hz)A20: Four 4–20 mA Analog OutputsR: Standard Display Panel with Red LEDs
2. Key Technical Specifications
| Parameter Category | Specification Details |
| Control Power Supply | 88–300 VDC (35 W max) / 70–265 VAC (35 VA max, 48–62 Hz) |
| Phase / Ground Current Inputs | 5 A secondary standard CT inputs |
| Sensitive Ground Input | 5 A rating |
| Trip Relay Contacts | 250 VAC @ 10 A continuous; 250 VDC @ 0.4 A break |
| Signal / Auxiliary Contacts | 250 VAC @ 5 A continuous; 250 VDC @ 0.3 A break |
| Analog Outputs | Four active 4–20 mA outputs (for metering/PLC/SCADA integration) |
| Communication Protocols | Modbus RTU, DNP 3.0 via RS232 / RS485 serial ports |
| Enclosure / Construction | Draw-out chassis design (IP40 front bezel, IP20 terminals) |
3. Product Advantages
- Comprehensive Feeder Protection: Combines phase/ground time and instantaneous overcurrent protection, thermal overload, directional overcurrent, over/under frequency, and over/under voltage functions in a single package.
- Draw-Out Chassis Design: Allows quick testing, replacement, or maintenance without rewiring the rear terminal block, minimizing system downtime.
- Circuit Breaker Health Monitoring: Tracks breaker trip counters, calculates contact wear based on integrated I^2t interruption power, and provides trip-coil monitoring.
- Advanced Metering & Oscillography: Captures transient fault waveforms and event logs for fast post-fault analysis and root-cause troubleshooting.
- Flexible Communications: Easy integration into existing PLC, DCS, or SCADA systems using industry-standard Modbus RTU or DNP 3.0 protocols.
4. Primary Applications
- Distribution Feeder Protection: Primary relay for utility and industrial 3-phase medium-voltage feeders.
- Transformer & Bus Backup Protection: Provides secondary overcurrent and earth fault protection for main power transformers and substations.
- Industrial Plant Power Distribution: Ideal for high-reliability environments such as oil & gas, mining, chemical, and metal processing facilities.
- Breaker Control & Management: Monitors trip circuit health and breaker status while providing trip/close commands via automated logic.
5. Precautions & Maintenance Guidelines
Safety Warning: High voltage is present on control power and current transformer (CT) terminals. Always ensure CTs are short-circuited before disconnecting input wiring.
- CT Secondary Circuit Shorting: Never open-circuit the CT secondary terminals while primary current is flowing. High induced voltages can cause severe electric shock or equipment failure.
- Control Power Matching: Confirm the auxiliary supply voltage matches the HI specification range (88–300 VDC or 70–265 VAC) prior to energization.
- Proper Grounding: Ensure the enclosure grounding lug is securely connected to the main ground grid to prevent EMI interference and safety risks.
- Environmental Controls: Operate within specified temperature (-40°C to +60°C) and non-condensing humidity ranges to ensure long-term stability.
Advantages: Foxboro, OVATION, TRICONEX, Allen-Bradley, ABB, Motorola, Siemens Moore, Ge Fanuc, Woodward, Bently Nevada and other major import brands!
We have the same series of models in stock. If you don’t find the model you need, please contact us and we will provide you with an official quotation！
Colour：new Warranty: 12 months
Lead Time：3-day working day Country of origin: United States
Price: Please contact us Product weight：0.515kg
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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