35kv high voltage vacuum contactor usage occasions and scope of application

1. For 35KV metering (for prepaid metering switch)

It is only used to make and break the line and can break the load current. However, there are few methods of use, because a metering current transformer may have been installed on the 35KV substation vacuum circuit breaker and has a prepayment function.

2. 35KV electric arc furnace control (used to control the on-off of 35KV transformer)

This switch is mainly used in electric arc furnaces. Considering the short operating life of the vacuum circuit breaker, a vacuum switch is added between the circuit breaker and the transformer for frequent on and off operations of the transformer. The operating frequency is daily. 70~80 times. The vacuum circuit breaker performs protective actions against overcurrent, short circuit, quick-break and other faults of the entire line.

3. 35KV Wind power and photovoltaic SVG bypass (for bypass current limiting resistor)

The switch used in this occasion is mainly used to bypass the current-limiting resistor for capacitor charging of 35KV SVG compensation (that is, when the compensation system is put into the line, the current-limiting resistor is added to limit the excessive current during the capacitor charging process. When the capacitor is charged, When the current change is small to a certain extent or the capacitor voltage is charged to a level close to the line voltage, our vacuum switch bypasses the current limiting resistor, allowing the SVG compensation system to be put into normal operation on the line for refined dynamic compensation)

Add practical applications of SVG

4. 35KV compensation (for switching capacitors)

This application is mainly used in electric arc furnace line compensation. When the electric arc furnace is working, the voltage of the line will fluctuate greatly due to the intermittent addition of steel raw materials in the electric arc furnace. Therefore, a compensation device is added to the line to increase the voltage, thereby increasing the voltage. Power factor.

At present, through the on-site use of our company's JCZ9 product, the ability to break capacitive current is below 100A (that is, the capacity of the switching capacitor is below 6000KVar.

5. Other applications.