Description
REFU ELEKTRONIK WS17031103SP04
Technical Specifications: Supply voltage: 24VDC control supply Grid signal sampling: Voltage and current analog sampling Communication interfaces: RS485, Ethernet Operating temperature: -20℃ to +60℃ Protection class: IP20 Mounting: DIN rail or cabinet internal mounting Certifications: CE, IEC grid standard certifications
Functional Features: Real-time sampling of grid voltage and current signals. Active power and reactive power calculation. Grid monitoring and grid fault detection. Inverter power setpoint control. Grid protection function including overvoltage, undervoltage and frequency protection. Serial and Ethernet communication for data exchange with plant control system. Onboard fault recording and event log storage.
Application Scenarios: Photovoltaic inverter control system, energy storage power conversion system, industrial power quality control, grid-connected power generation equipment, wind power auxiliary control, commercial solar plant monitoring and control.
Performance Parameters: High speed grid signal sampling cycle. High accuracy power calculation. Fast grid fault response for protection trigger. Continuous 24/7 operation for renewable power plants.
Material Composition: FR4 high voltage resistant power printed circuit board. High precision voltage and current sampling components. Power control microprocessor. Signal isolation circuits. Flame retardant plastic housing. Screw terminal blocks for power and signal wiring.
Structural Features: Compact cabinet mount module structure. Front panel LED indicators for power, run and fault status. Screw terminals for grid signal sampling wiring and communication wiring. EMC shielding circuit for power environment anti-interference. Internal separation between high voltage sampling circuit and low voltage control circuit.
Working Principle: 24VDC control power energizes the onboard microprocessor and sampling circuit. Voltage and current sensors feed grid analog signals into the module. The module samples grid signals continuously, calculates active and reactive power and monitors grid voltage and frequency. According to setpoint received from upper control system, the module outputs control commands to power inverter unit. When grid anomaly is detected, it triggers protection signal to shut down inverter grid feed-in. All operation data and fault events are stored in onboard memory.
Installation Requirements: Install inside IP20 power control cabinet. Use shielded twisted cable for signal sampling and communication wiring. Separate low voltage control cables and high power power cables. Tighten terminal screws to specified torque. Maintain cabinet ambient temperature within -20℃ to 60℃.
Usage Notes: Do not connect signal terminals to high voltage directly. Verify grid signal polarity during commissioning. Backup configuration parameters before firmware modification. Cut off all power supply before module replacement or wiring modification. Carry out periodic grid signal calibration.
