10KV Three phase Three-phase AC Column Upper Switch China Manufacturer Details

The voltage Isolating switch (high voltage disconnector) is mainly used to reliably isolate the parts that need to be cut off from the live pieces in the high-voltage distribution device to ensure the safety of maintenance work.

The contacts of the isolation switch are all exposed to the air and have obvious disconnection points. The isolation switch does not have an arc extinguishing device, so it cannot be used to cut off load current or short-circuit current. Otherwise, under high voltage, the disconnection point will generate a strong arc, making it difficult to extinguish. It may even cause arcing (phase to ground or phase to phase short circuit), burn equipment, and endanger personal safety, causing a severe accident called "pulling the isolation switch with the load." Isolation switches can also be used to switch specific circuits to change the operation mode of the system.

Symbols for high voltage isolation switches:

1. In the commonly used text symbol comparison table for electrical equipment, the symbol of the isolation switch is QS. The electrical symbol symbol is specified in IEC61636-1, not an English abbreviation but a combination of letter meanings. Q represents the switching device of the SWITCHING DEVICE FOR POWER CIRCUIT power circuit, and S represents the switching device selector of the SWITCHING DEVICE FOR Control CIRCUIT SELECTOR control, memory, and signal circuits.

2. High-voltage isolation switches are necessary switching devices in the electrical systems of power plants and substations and are generally required to be used with high-voltage circuit breakers.

3. High voltage isolation switches are suitable for indoor devices with three-phase AC 50Hz and a rated voltage of 12KV. They are used to connect, cut off, or convert circuits of high-voltage equipment under voltage and load conditions.

4. Commonly used high voltage isolation switches include GN19-10 and GN19-10C, while similar old products include GN6-10 and GN8-10.

We also produce other distribution equipment such as Vacuum Circuit Breakers, Power Cables, power distribution cabinets, etc. Please feel free to leave a message for consultation.