Description
GE SR750-P5-G5-S5-HI-A20-R Technical Specifications:
- Phase Current Input: 5 A nominal rating.
- Zero-Sequence Current: 5 A input.
- Sensitive Ground Current: 5 A input.
- Control Power: Universal 88-300 VDC or 70-265 VAC @ 48-62 Hz.
- Analog Outputs: 4 isolated 20-<> mA analog outputs for external monitoring.
Functional Features:
- High-Current Compatibility: Specifically scaled for 5 A instrument transformers.
- Advanced Navigation: Intuitive keypad allows direct access to metering, status, maintenance, and arc flash current data.
- Real-Time Execution: Settings entered via the keypad are applied immediately, requiring caution during live adjustments.
- Breaker Monitoring: Comprehensive breaker timing, trip counting, and contact wear monitoring.
Application Scenarios:
- High-current distribution feeders in manufacturing and petrochemical facilities.
- Large industrial motor protection and control.
- Substations utilizing 5 A CT and VT standards.
Performance Parameters:
- Resolution: High-resolution ADC for precise 5 A signal measurement.
- Output Flexibility: Analog outputs can be mapped to any internal variable for SCADA integration.
- Processing: Dedicated hardware for simultaneous protection and metering tasks.
Material Composition & Structural Characteristics:
- Internal Components: High-reliability microprocessors and precision analog front-end circuits.
- Terminals: Heavy-duty rear terminal blocks rated for 5 A continuous current.
- Display: High-contrast LCD for readability in low-light control rooms.
Working Principle: The relay accepts 5 A secondary signals from field instrument transformers. The internal signal conditioning scales these inputs for the microprocessor. The processor executes protection algorithms and updates the real-time clock, event recorder, and analog output drivers. User inputs via the front panel modify the operational parameters stored in non-volatile memory.
Installation Requirements:
- CT Sizing: Ensure connected CTs are rated for 5 A secondary output.
- Analog Wiring: Use shielded cables for the 4 analog outputs to prevent signal interference.
- Live Editing: Exercise extreme caution when modifying setpoints while the relay is in service, as changes take effect instantly.
Usage Precautions:
- Hardware Security: Utilize the hardware jumper and password lockout to prevent unauthorized field modifications.
- Arc Flash Safety: Follow appropriate PPE guidelines when accessing the front panel in live environments.
- Analog Loading: Ensure the connected burden on the analog outputs does not exceed the specified
