JKL21A series reactive power compensation controller features:

When the load current of the power grid is large (sampling current>0.5A), the sampling physical quantity of the product is power factor, which controls the switching of compensation capacitors according to the size of the power factor of the power grid. Therefore, it is suitable for power grids of various sizes and is not limited by the size of switching capacitors or the ratio of sampling current transformers In use, it generally does not require adjustment and can work stably
When the load current of the power grid is low (when the sampling current is less than 0.5), the controller automatically enters the undercurrent working state, starts the reactive current detection system, and samples the physical quantity of reactive current to avoid oscillation switching phenomenon. When the sampling current is less than 0.1A, the controller enters the automatic blocking state
2. It has output channels ranging from 2 to 12, which users can set themselves
3. The output circuit adopts a cyclic working mode of "connect first, disconnect first" to ensure that each contactor and capacitor operates the same number of times, extending the fault free working time 4. It has overvoltage protection function to prevent capacitors from being damaged during operation under overvoltage conditions
5. Equipped with an "automatic/manual" shift switch for easy debugging
6. Automatically distinguish the positive and negative phases of the incoming line, making installation and debugging very convenient
7. Adopting the new generation microcontroller from MICROCHIP company in the United States, it overcomes the disadvantage of electronic circuits being susceptible to interference and works reliably and stably

Usage conditions:
1. The altitude shall not exceed 2000m
2. The ambient air temperature is between -20 ℃ and+55 ℃, and the average temperature within a 24-hour period does not exceed 35 ℃
3. The surrounding environment is free of corrosive gases, conductive dust, and explosive and flammable media
4. The relative temperature should not exceed 50% at+40 ℃ and 90% at+20 ℃, without condensation
5. The voltage fluctuation range is -50% to+20%
6. The vibration frequency range of the installation site is 10-150Hz, and the maximum vibration acceleration is not greater than 5m/S2

Technical parameters of JKL21A series reactive power compensation controller:

1. Investment threshold: 0.95 (adjustable from 0.9 to 1.0)
2. Cut off threshold: -1.0 (adjustable from -0.98 to -1.0)
3. Overvoltage protection:
When the rated voltage is 380V, it is 440V (adjustable from 400V to 440V)
When the rated voltage is 220V, it is 265V (adjustable from 230V to 265V)
4. Delay time: 30s (adjustable from 5s to 100s).
5. Rated working voltage: AC 50Hz 380V, (220V optional)
6. Current sampling input: ≤ 5A (AC)
7. Undercurrent: 0.5A (activate reactive current detection system)
8. Sensitivity: 0.1A, dielectric strength: 2500VAC
9. Overvoltage interruption time: not more than 1 minute
10. Output relay contact capacity: 1.5A (250V) contact capacity
11. Protection grade: not less than IP40
12. Work status: Continuous work system
Size and installation:
1. The external dimensions and installation dimensions are shown in Figure (1).
2. When installing, insert the hook of the installation accessory into the injection hole on the side of the controller, and turn the accessory screw to fix the machine on the screen.
3

JKL21A Type III Dimensional Drawing

JKL21A Type II Dimensional Drawing

wiring
1. When the rated voltage (sampling voltage) of this machine is 220V, the wiring should follow the diagram (2).
2. When the rated voltage (sampling voltage) of this machine is 380V, the wiring should be as shown in Figure (3).
3. The sampling current Is must be taken from the total load power line and not from the capacitive screen.
4. Please identify the phase accurately when wiring:
When the rated voltage is 380V, the sampling voltage and current must be taken from different phases.
When the rated working voltage is 220V, the sampling current must be taken in the same phase.
5. The current input and voltage input must not be connected incorrectly, otherwise it will burn out the machine.
Panel functions, debugging, and operation
1. Route adjustment: After power on, press the "Function Selection" button to turn on the "Route" indicator light. Press the "+" or "-" adjustment button to display the required route on the digital display. This function is only effective for 25 seconds of power on and automatically locks the route when it expires.
2. Cut off threshold adjustment: Press the "Function Selection" button to turn on the "Upper Limit" indicator light, and press the "+" or "-" adjustment button to display the desired value on the digital display.
3. Input threshold adjustment: Press the "Function Selection" button to turn on the "Lower Limit" indicator light, and press the "+" or "-" adjustment button to display the desired value on the digital display.
4. Overvoltage protection adjustment: Press the "Function Selection" button to turn on the "Overvoltage" indicator light, and press the "+" or "-" adjustment button to display the desired value on the digital display.
5. Delay time adjustment: Press the "Function Selection" button to turn on the "Delay" indicator light, and press the "+" or "-" adjustment button to display the desired value on the digital monitor.
6. Automatic operation, shift the gear switch to the "automatic" position, run the indicator light, and the controller automatically switches capacitors.
7. Manual operation, shift the gear switch to the "manual" position. When the "running" indicator light is on in the "running" position, press the "+" or "-" adjustment button to turn on or off the capacitor.
8. If there is no button operation within 20 seconds when the shift switch is turned to the "automatic" position, it will automatically return to the running state, and the "running" indicator light will be on.
9. Memory parameters: The parameters set by the user are saved in memory and will not be lost in case of power failure. To restore the factory settings, press and hold the "Function Selection" button when powering on again.
Usage and Instructions
1. Before powering on, check whether the wiring terminals are connected accurately.
2. The shift switch must be set to "automatic" during operation.
3. The controller is factory preset with control parameters that can be adjusted according to general user requirements, without the need for further adjustments, and can work stably; If users need to make actual adjustments on site, they should refer to the instructions or be guided by technical personnel. Note that the "delay" time should not be less than 15 seconds to protect the capacitor.
Common Fault Analysis
1. The following controllers should be considered as normal phenomena:
a、 The power factor of the power grid is very low, the controller does not operate, and the undercurrent light is on (<0.1). When the load current is sufficient, it will naturally activate.
b、 The power factor of the power grid is very low, the controller does not operate, and the overvoltage light is on. After the voltage returns to normal, it will take action.
c、 The power factor of the power grid is very low, and all lines have been put into operation. It is normal for the input lights to still be on (requiring an increase in capacitance).
d、 The power factor of the power grid is ahead, the reactive power meter reverses slowly, the controller does not cut off, and if the lead value exceeds the set threshold, it will be cut off.
2. The following phenomena can be determined as controller faults:
a、 Put the light on but not put it in.
b、 The overvoltage light is on but not turned off.
c、 The cutting sequence is disorderly and disorganized.
d、 The wiring is correct, the fuse is intact, but the controller is unresponsive and does not operate.
3. If any abnormal phenomenon occurs, please contact us immediately and we will do our best to serve you.