The capacitor cabinet switches the capacitor contactor coil voltage to how many volts

The coil voltage of the capacitor cabinet switching capacitor contactor is generally 380V.

Switching capacitor contactors (hereinafter referred to as contactors) are special contactors used to turn on and off low-voltage shunt capacitors, which are widely used in reactive power compensation equipment for automatic compensation, and are suitable for switching capacitors to 90kvar in power systems with an AC frequency of 50Hz and a rated working voltage of 380V to improve the power factor. The contactor is a building block type, the resistance circuit part is above the main circuit part, and the resistance circuit is three-way. The main contact is reasonably designed, and the load is carried separately and works reliably.

Toggle the capacitor contactor operating conditions.

a. Ambient air temperature: the upper limit is +40 °C, the average value does not exceed +35 °C within 24 hours, and the lower limit is -5 °C; b. Altitude: the altitude of the contactor installation site does not exceed 2000m; c. Temperature:

The relative humidity of the air at the place where the contactor is installed shall not exceed 50 at a temperature of +40 °C], the average minimum temperature of the wettest month shall not exceed +25 °C, and the average maximum relative humidity of the month shall not exceed 90]; d. Pollution level: level 3; e. Installation category: Class III; f. Shock and vibration:

The contactor is installed where there is no significant shaking, shock, and vibration; g. Installation conditions: The inclination between the installation surface and the vertical plane of the contactor is not more than 5°.

Switching capacitor contactor principle.

When the electromagnetic coil of the contactor is energized, the resistor is connected in advance, and the current is charged to the capacitor through the resistance, and the resistance inhibits the inrush current of the capacitor closing, and then the main contact is closed to carry the capacitor current. The resistor circuit is automatically reset when the capacitor is disconnected from the main circuit after the capacitor is closed and inrush current, reducing the chance of the resistor burning out when the capacitor is turned off.

The coil voltage of the capacitor switching contactor can be 220V or 380V, and the wiring method of the automatic compensation controller is also different according to the different coil voltage, but 220V is generally selected, mainly because the output contact capacity of the controller is 220V (5A) is higher than that of 380V (3A).

There is a small card on the lead line of the contactor wire package at the upper end of the front, which has two kinds, generally 220V and 380V, and it is not clear that you can refer to the direction of the line, and it is 220V to connect to the N line

You have to look at the voltage of the contactor coil, according to the wiring situation, it can also be determined, the return line back to N is 220V, back to the phase line is 380V

This should be determined according to the design of the secondary circuit, there are AC 110V, 220V, 380V, DC 110V, 220V, etc.

Pay attention to the capacitor of the 0,4kv capacitor cabinet with live replacement.

Hello, first of all: cut off the power supply of the low-voltage capacitor compensation cabinet and let the power supply capacitor bank self-discharge. Step 2:

After the capacitor is self-discharged, it is manually discharged by touching the capacitor terminal with a ground rod. Step 3: After confirming the complete discharge with an electroscope, remove the damaged power capacitor.

Step 4: Replace the power capacitor and check if the capacitor connection is accurate. Step 5:

Test run to test whether the capacitor is normal; If there are no failures, it will be officially put into service. Pay attention to whether the size of the old and new power land-closed capacitors matches, so as to avoid the new capacitors cannot be installed. Pay attention to whether the voltage level and compensation capacity of the new and old power capacitors match the liquid, and avoid the undercompensation or overcompensation.

After discharge, an electroscope should be used for detection to protect the safety of the operator.

1 The current limiting main contact and the contactor main contact are separated in normal operation, and they do their own thing.

2 There are many auxiliary contacts. There are three pairs below 32a, and 4 pairs above 40a.

3 Designed for the whole series of spring grips, there are eight specifications of 16, 25, 32, 40, 50, 63, 80 and 95A. Each capacity is equipped with a contactor of its own capacity.

4. The capacitance controlled by the design switching capacitor has a large safety factor and a certain margin. Safe and reliable.

5. The current limiting resistor group is symmetrical, linear, insulated, and heat-resistant.

6. The contactor tower reaction spring makes the suction reaction force well matched, the magnet is stable and the electromechanical life is high.

7. The product has high technical and economic indicators, and has high macro fibrillation breaking ability and current limiting ability.