Overview
The ZMJKWG-3M is an intelligent controller designed for high-voltage reactive power compensation systems. It continuously monitors power factor, reactive current, and system voltage to achieve automatic capacitor group switching, ensuring stable power factor and improved system efficiency.
It integrates advanced microprocessor control, high-precision measurement circuits, and a user-friendly interface to provide stable, accurate, and reliable performance in various industrial and utility applications.
Main Functions
- Automatic Reactive Power Compensation:
Real-time detection of power factor and reactive current, automatic switching of capacitor groups to maintain target PF. - Multi-mode Control:
Supports automatic, manual, and remote operation modes. - Harmonic Suppression Recognition:
Intelligent identification of harmonics to prevent capacitor resonance and mis-switching. - Protection Functions:
Includes overvoltage, undervoltage, overcurrent, harmonic distortion, and communication fault alarms. - Measurement & Display:
Displays three-phase voltage, current, reactive power, active power, and power factor in real time. - Parameter Settings:
Adjustable switching delay, PF setpoint, voltage/current ratios, and step capacity. - Communication Interface (Optional):
RS-485 / MODBUS-RTU protocol for integration with SCADA or monitoring systems.
Technical Parameters
| Item | Parameter |
|---|---|
| Model | ZMJKWG-3M |
| Applicable System Voltage | 6 kV – 35 kV |
| Auxiliary Power Supply | AC 220 V ±10% |
| Measuring Input | 3-phase voltage and current inputs |
| Display Type | LCD screen with function keys (Enter / ↑ / → / Exit) |
| Power Factor Range | 0.00 – 1.00 (lag/lead) |
| Control Output Channels | 6 – 12 channels (expandable) |
| Communication Interface | RS-485 (MODBUS-RTU) |
| Operating Temperature | −25 °C ~ +55 °C |
| Storage Temperature | −40 °C ~ +70 °C |
| Relative Humidity | ≤ 95% (non-condensing) |
| Protection Level | IP54 (front panel) |
| Installation Method | Panel-mounted |
| Dimensions (W × H × D) | 144 × 144 × 110 mm |
Advantages
✅ Precise measurement with digital sampling and DSP algorithm
✅ Adaptive capacitor control strategy for balanced compensation
✅ Anti-harmonic protection to avoid false triggering
✅ Modular design for easy maintenance and expansion
✅ Clear LCD display with intuitive key operation
Performance Highlights
- Real-time correction of power factor and reactive power balance
- Precise switching logic minimizing capacitor wear and inrush current
- Fully digital measurement and compensation algorithm
- Modular design for easy maintenance and upgrade
- Compatible with harmonic filtering systems (detuned reactors)
- Optional communication expansion for data acquisition systems
Typical Application
- High-voltage capacitor banks (6–35 kV)
- Power distribution substations
- Industrial power networks with variable load (steel, cement, mining, etc.)
- Automatic compensation cabinets and filter cabinets
Ordering Information
| Model | Description |
|---|---|
| ZMJKWG-3M | High Voltage Reactive Power Compensation Controller, 6–35 kV, 6–12 outputs, RS-485 optional |
🌍 Why Choose ZHIMING GROUP
As a professional manufacturer of power quality and reactive power compensation solutions, ZHIMING GROUP provides complete product ranges including:
- High & Low Voltage Power Capacitors
- Detuned Reactors
- Power Factor Controllers (Low & High Voltage)
- Automatic Compensation Cabinets
- Current Transformers and Contactors
📞 Get a Quote
Interested in integrating ZMJKWG-3M into your capacitor bank or power quality system?
📩 Contact us today for technical consultation, OEM customization, and distributor pricing.
