Table of Contents
Application
ZHIMING brand of JKWF-12 Series Reactive Power Auto-compensation Controller.
1.1 Fully digital design with true AC sampling and a user-friendly human-machine interface featuring a large LCD display in English.
1.2 Modular structure with an optimized, professional appearance.
1.3 Real-time display of system parameters, including:
– Power factor
– Voltage
– Current
– Active power
– Reactive power
– Voltage total harmonic distortion (THD)
– Current total harmonic distortion (THD)
– System frequency (average)
– Capacitor switching status (on/off)
1.4 Capacitor control modes:
– Three-phase compensation
– Comprehensive (balanced) compensation
1.5 Compensation modes:
– Manual mode
– Automatic mode
1.6 Reactive power factor is used as the control sampling value, with integrated harmonic detection and protection functions.
1.7 Equipped with an RS-485 communication interface and MODBUS protocol, enabling easy integration with intelligent power distribution cabinets.
Technical Specifications
Measurement Data
- Voltage Measurement Range: 100V – 290V
- Primary Current Measurement Range: 0 – 6000A
- Secondary Current Sensitivity: ≥ 50mA
- Power Factor Display Range: Lagging 0.200 ~ Leading 0.200
- Operating Voltage: 220V ± 20%
- Frequency Range: 47 – 53Hz
- Active Power Measurement Range: 0 – 6553 kW
- Reactive Power Measurement Range: 0 – 6553 kVar
- Voltage Total Harmonic Distortion (THD): 0.0% – 100.0%
- Current Total Harmonic Distortion (THD): 0.0% – 100.0%
Input / Output Signals
- Voltage Sampling Inputs: L1, L2, L3 phases
- Current Sampling Input: Bus current transformer (CT), secondary 0 – 5A
- Control Output: Relay output
Communication Interface
- Communication Port: RS-485
- Protocol: MODBUS RTU
- Baud Rate: 9600 bps
Settings and Adjustable Parameters
- CT Ratio Setting (Primary/Secondary): 50 – 9999 (/5)
- Input/Disconnection Delay Time: 1 – 240 seconds
- Input Threshold Limit (cosφ): 0.7 ~ –0.7
- Over-Voltage Protection Threshold: 220V – 260V
- Under-Voltage Protection Threshold: 180V – 220V
- Voltage Harmonic Protection Limit: 1% – 99%
- Note: Setting at 99% disables protection
- Current Harmonic Protection Limit: 1% – 99%
- Note: Setting at 99% disables protection
Wiring Diagram
