Function and Usage
The NWK1-GR series of low-voltage reactive power automatic compensation controllers (referred to as controllers) use a mobile phone menu operation mode to realize human-machine interaction, suitable for power grid distribution monitoring and reactive power compensation that combines common compensation and individual compensation. It uses an ASIC processing chip, and through FFT (fast Fourier calculation), it calculates and analyzes the three-phase voltage and three-phase current collected, so even when there is a large harmonic component in the power grid, it can normally use reactive power as the basis for switching capacitors, and combine it with power factor for switching. The capacitor capacity can be set by cycle, code or any value combination, to match or switch single-phase or three-phase capacitors, achieving the optimal compensation effect. It completely covers low-voltage power grid systems in different regions such as 220V, 380V, 440V, 690V, etc., and is compatible with 50Hz and 60Hz frequencies. It has stronger anti-harmonic capability, has Chinese and English versions, can be customized for photovoltaic products, and is a new generation of intelligent low-voltage reactive power automatic compensation controller introduced by our company.
Detailed Parameters
| Parameter Category | Parameter Item | Parameter Value |
|---|
| Item | NWK1-GR-12GB(D)/18GB(D)/24GB(D) | NWK1-GR-12FB(D)/18FB(D)/24FB(D) |
| Display Screen | Chinese and English LCD | Chinese and English LCD |
| Compensation Type | Common Compensation Type | Mixed Compensation Type (Common + Individual) |
| Output Circuit Number | Up to 12/18 circuits/24 circuits (number of circuits can be arbitrarily set) | Up to 12/18/24 circuits (number of common and individual compensation circuits can be arbitrarily set) |
| Voltage Harmonics | 3-15th harmonic bar chart and content | 3-15th harmonic bar chart and content |
| Capacitor Current Overload | Off / On | Off / On |
| Zero Sequence Voltage | None | Off / On |
| Unbalance | None | Yes |
| Reactance Rate Setting Note 1 | Off/(0.10~20.0)% | Off/(0.10~20.0)% |
| Sampling Voltage | BC phase 70-800Vac, impedance ≥1MΩ | Three-phase 40~480Vac, L-N impedance ≥1MΩ |
| Sampling Current | A phase 20mA~6A sensitivity 20mA impedance ≤0.1Ω | Three-phase 20mA~6A sensitivity 20mA impedance ≤0.1Ω |
| Rated Frequency | 45Hz~65Hz automatic adaptation | 45Hz~65Hz automatic adaptation |
| Working Power Supply | AC220V±20%, independent working power supply, maximum power consumption: 6W | AC220V±20%, independent working power supply, maximum power consumption: 6W |
| Control Physical Quantity | Reactive Power Type / Composite Type (users can set according to needs) | Reactive Power Type / Composite Type (users can set according to needs) |
| Switching Method | More than twenty types of coding or arbitrary capacitor capacity setting | More than twenty types of coding or arbitrary capacitor capacity setting |
| cos Set Note 2 | Input range: 0.850L (inductive) - 0.850C (capacitive) continuously adjustable; Cut-off range: 0.850L (inductive) - 0.850C (capacitive) continuously adjustable | Input range: 0.850C (inductive) - 0.850C (capacitive) continuously adjustable; Cut-off range: 0.850L (inductive) - 0.850C (capacitive) continuously adjustable |
| Investment Threshold Note 2 | Below the investment factor threshold, reactive kvar > reactive threshold coefficient × minimum circuit capacity value | Below the investment factor threshold, reactive kvar > reactive threshold coefficient × minimum circuit capacity value |
| Disconnection Threshold Note 2 | Above the disconnection factor threshold | Above the disconnection factor threshold |
| Reactive Threshold Coefficient | 11-2.5 | 1.1-2.5 |
| Sampling CT Ratio | 5/5A-10000/5 | 5/5A-10000/5 |
| Investment Delay | 2S-180S | 2S-180S |
| Disconnection Delay | 2S-180S | 2S-180S |
| Overvoltage Threshold | 100V-800V | 100V-480V |
| Undervoltage Threshold | 75V-620V | 75V-360V |
| Harmonic Protection | Off / 5-90% | Off / 5-90% |
| Discharge Delay | 0-240S | 0-240S |
| Alarm Output | Off / 10S-300S / Continuous Contact Capacity: 5A, 250VAC | Off / 10S-300S / Continuous Contact Capacity: 5A, 250VAC |
| Fan Start | /0℃C~65℃ Contact Capacity: 5A, 250VAC | /0℃C~65℃ Contact Capacity: 5A, 250VAC |
| High Temperature Alarm ℃ | /0℃C~85℃ | /0℃C~85℃ |
| Large Screen Main Interface | Off / On | Off / On |
| Factory Initialization | Yes | Yes |
| Relay Contact Output | 5A, 250VAC Response Time ≥2S | 5A, 250VAC Response Time ≥2S |
| DC 12V Output | Each circuit 10-20mA, 12VDC | Each circuit 10-20mA, 12VDC |
| Communication Function | Interface RS485, Protocol ModBusRTU/EC101 | Interface RS485, Protocol ModBusRTU/EC101 |
| Display Type | Chinese / English, graphical display | Chinese / English, graphical display |
| Product Size | 120x120x93(mm) | 120x120x93(mm) |
| Installation Cutout | 113x113(mm) | 113x113(mm) |
| Note 1 | Photovoltaic power generation, fast compensation, filter compensation custom products have this function. | Photovoltaic power generation, fast compensation, filter compensation custom products have this function. |
Note 2When the engagement factor and disengagement factor are set to the same value, the controller's control physical quantity is switched according to the reactive power type (similar to the target power factor of foreign products); the engagement threshold and disengagement threshold are automatically switched as follows:
Engagement threshold: The required reactive power Δkvar>1/2x reactive power threshold coefficient × minimum circuit capacity value
Disengagement threshold: The required reactive power Δkvar>1/2x reactive power threshold coefficient × minimum circuit capacity valueWhen the engagement factor and disengagement factor are set to the same value, the controller's control physical quantity is switched according to the reactive power type (similar to the target power factor of foreign products); the engagement threshold and disengagement threshold are automatically switched as follows:
Engagement threshold: The required reactive power Δkvar>1/2x reactive power threshold coefficient × minimum circuit capacity value
Disengagement threshold: The required reactive power Δkvar>1/2x reactive power threshold coefficient × minimum circuit capacity value
