Description
- Measurement Accuracy: Voltage/current: ±0.5%; power/energy: ±1%
- Operating Temperature: -25°C to +70°C
- Protection Class: IP54 (front panel when installed in a switchgear cabinet)
- Communication: RS485 serial port (Modbus RTU protocol), optional Ethernet (supporting DNP3.0, IEC 60870-5-104 in some models)
- Display: Backlit LCD for local operation and configuration
Functional Features
- Protection Functions:
- Phase overcurrent protection
- Ground overcurrent protection
- Directional overcurrent protection (optional)
- Thermal overload protection
- Breaker failure protection
- Auto-reclosing (configurable)
- Measurement and Monitoring:
- Real-time measurement of three-phase voltage, current, power, energy, and frequency
- Harmonic analysis (supported in some versions)
- Event recording with timestamp (fault records, operation logs)
- Maximum demand recording
- User Interface:
- Local keypad operation for settings, event viewing, and measurement display
- Communication and I/O:
- Multiple programmable digital inputs/outputs (DI/DO)
Application Scenarios
- Industrial Power Distribution: Used for feeder protection in industrial facilities such as factories, mines, and refineries.
- Commercial Building Power Management: Protects incoming and outgoing feeders in commercial buildings, ensuring safe and reliable power supply.
- Renewable Energy Integration: Applied in grid connection points for renewable energy sources like solar and wind power to ensure stable integration with the main grid.
- Smart Distribution Automation: Works with SCADA systems to enable intelligent distribution automation, improving grid efficiency and reliability.
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