Description
GE D90AC
Technical Specifications:
- Brand: General Electric (GE) Multilin
- Model: D90AC
- Product Type: Line Distance Protection Relay
- System Compatibility: GE UR D90 Plus Series
Functional Features:
- Multi-Zone Protection: Provides highly accurate multi-zone distance protection to isolate faults at varying distances from the relay.
- Advanced Metering: Integrates high-precision metering and monitoring features for real-time power quality analysis.
- Digital Fault Recording: Captures high-resolution oscillography and event logs for post-fault analysis and system optimization.
Application Scenarios:
Deployed in utility transmission networks, large-scale industrial power distribution grids, and renewable energy interconnection points.
Performance Parameters:
- Processing Speed: Ultra-fast fault detection and tripping times to minimize equipment damage and maintain grid stability.
- Communication: Supports multiple protocols (e.g., Modbus, DNP3) over Ethernet and serial interfaces for seamless SCADA integration.
Material Composition:
Housed in a rugged, industrial-grade metallic enclosure with high-quality PCBs, precision analog front-end components, and gold-plated relay contacts.
Structural Characteristics:
Standard rack-mountable horizontal chassis featuring an intuitive front panel interface with an LCD display, navigation keypad, and comprehensive status LEDs.
Working Principle:
Continuously samples voltage and current waveforms via internal ADCs. The microprocessor calculates the apparent impedance of the line; if the impedance falls within predefined zones, it identifies a fault and issues a trip command.
Installation Requirements:
Must be securely mounted in a standard 19-inch rack. Voltage and current transformer secondary wiring must be correctly polarized and properly grounded.
Usage Precautions:
Always use the dedicated EnerVista setup software for configuration. Ensure CT secondary circuits are never left open while the relay is energized to prevent hazardous high voltages.
