1.Function

This automatic reactive power compensation controller, It is suitable for automatic regulation of capacitor compensation device in low voltage distribution system (here in after referred to as controller), It makes the power factor reach the user's predetermined state,improves the utilization efficiency of the power transformer, reduces the line loss, and improves the voltage value of the power supply,so as to improve the economic and social benefits.

2. Function Feature

1. Power factor + reactive power is used to calculate capacitor switching, and the compensation accuracy is high.
2. The power factor measurement accuracy is high and the display range is wide.
3. Automatic identification of current polarity makes wiring more convenient.
4. With power factor, system voltage, system current, active power, reactive power, grid frequency display.
5. The interface is friendly and easy to operate.
6. All kinds of control parameters are digital adjustable, intuitive and easy to use.
7. It has two working modes: automatic operation and manual operation.
8. It has overvoltage and undervoltage protection functions.
9. With power failure protection function, data will not be lost.
10. The input impedance of current signal is low ≤ 0.01 Ω.

3. Conditions of use
1. The altitude is not higher than 2500 meters.
2. Ambient temperature - 25 ℃ ~ + 50 ℃.
3. The air humidity is not more than 50% at 40 ℃ and 90% at 20 ℃.
4. There is no corrosive gas, conductive dust and flammable and explosive media in the surrounding environment.
5. There is no violent vibration at the installation site.

4. Technical data

Rated working voltage AC 220V or AC 380V 45-65hz
Rated working current AC 0-5A 45-65hz
Output contact capacity AC 220 V 5A
Display power factor lag 0.001 - lead 0.001
Measurement of reactive power 0-9999kvar
Sensitivity 50 Ma
Protection class enclosure IP40

5、 The advantages of this controller

1. According to the requirements of the wiring diagram, the compensation device should be assembled,and a detailed inspection should be carried out to eliminate the errors that will bring serious safety hazards.
2. When the compensation device is switched on, the controller enters the automatic operation state.
3. The transformation ratio of input field signal current transformer is shown in menu operation.
4. Input the minimum capacitor bank capacity, see menu operation for details. Warning: users must follow the following debugging steps during debugging.
5. Operate the "menu" key to make the manual operation indicator light on. As a means of debugging the compensation device, manual operation can be used to check whether the wiring is correct. Operate the increase key to put in a capacitor bank,and the decrease key to cut off a container group. Note: the output terminal corresponding to zero capacitor value cannot be switched. There can be no current signal for the above operation.
6. In order to enable the controller to switch the capacitor bank automatically, there must be a current signal lagging behind the voltage signal, and the system voltage should not be higher than the over-voltage protection value or lower than the under voltage protection value