China Disconnector Switch Factory

"JECSANY" is a professional China various medium and high voltage product provider which supplies Disconnector Switch, auto reclosers, switchgear, surge arresters, dropout fuses, polymer/porcelain insulators, power tools, power accessories, OPGW/ADSS optical cable, distribution transformers, etc. And be able to provide one-stop service for new and old customers, including product development, design, manufacturing, transportation, installation, and after-sales service.

Disconnector Switch (Isolation switch) is a switching device that is mainly used for "isolating power supply, switching off operation, and connecting and cutting off small current circuits" without arc extinguishing function. When the isolating switch is in the open position, there is an insulation distance and an obvious disconnection mark between the contacts that meet the specified requirements; in the closed position, it can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) within the specified time. current switching device. It is generally used as a high-voltage isolating switch, that is, an isolating switch with a rated voltage of more than 1kV. Its own working principle and structure are relatively simple, but due to the large amount of use and high requirements for work reliability, the design, establishment and operation of substations and power plants are required. The impact on safe operation is greater. The main feature of the isolation switch is that it has no arc extinguishing ability, and can only divide and close the circuit without load current. The entry introduces the function, characteristics, type, application, error prevention improvement, maintenance, common problems, etc. of the isolating switch.

The isolating switch has the following characteristics:
1. During the overhaul of electrical equipment, provide an electrical interval and a clearly visible disconnection point to ensure the personal safety of maintenance personnel.
2. The isolating switch cannot be operated with load: it cannot operate with rated load or large load, and cannot divide and combine load current and short-circuit current, but those with arc extinguishing chamber can operate with small load and no-load line.
3. In general power-on operation: first close the isolating switch, then close the circuit breaker or load switch; in the case of power-off operation: first open the circuit breaker or load switch, and then open the isolating switch.
4. The selection is the same as other electrical equipment, and its rated voltage, rated current, dynamic stable current, thermal stable current, etc. must meet the needs of the application.
The function of the isolating switch is to disconnect the circuit with no load current. The equipment to be overhauled and the power supply have an obvious disconnection point to ensure the safety of the maintenance personnel. The isolating switch cannot cut off the load current and short-circuit current without a special arc extinguishing device. Therefore, the isolating switch must be operated only when the circuit is disconnected by the circuit breaker.

The isolating switch is arranged on the main wiring to ensure that the line and equipment are separated from the live part by an obvious fracture. Since the isolating switch has no arc extinguishing device and has low breaking capacity, when operating the isolating switch, the switching operation sequence must be followed. That is to say, when power is supplied, the bus-side isolating switch is closed first, the line-side isolating switch is closed second, and the circuit breaker is closed last.

"JECSANY" Disconnector Switch has stable quality and the products are exported to Southeast Asia, South Africa, South America, the Middle East and other global markets. OEM customization can also be made according to the drawings or samples provided by customers.