THE DIFFERENCE BETWEEN A DISCONNECTING SWITCH AND A LOAD SWITCH

Many people do not understand the isolation switch and load switch, two kinds of switch is considered universal, can be replaced, but some occasions can not be replaced, Kesu electromechanical xiaobian tell you what is the difference between isolation switch and load switch.

The isolation switch itself has no arc extinguishing device, can only disconnect rated current, so in the loop only as an isolation element, in need of maintenance will be isolated from the power supply and load.

The load switch has an arc extinguishing device to disconnect the fault current, and its contact can be used as an isolation switch, with isolation and disconnect dual functions.
Load switches are generally composed of fuses and disconnecting switches. The disconnecting switch is used for normal loop operation, and the fuse is used to disconnect the fault current of the loop.

Introduction to disconnecting switch:

Isolating switch is a kind of switch device which is mainly used for isolating power supply, switching operation, connecting and cutting off small current circuit, without arc extinguishing function.
When the isolation switch is in a separate position, there is an insulation distance between contacts in accordance with the requirements and an obvious disconnect mark;
A switchgear capable, in closed position, of carrying current under normal loop conditions and current under abnormal conditions (e.g. short circuit) for a specified period of time.
Generally used as high voltage isolation switch, that is, rated voltage above 1kV isolation switch, its own working principle and structure is relatively simple, but due to the use of large, high reliability requirements, substation, power plant design, establishment and safe operation of the influence are large.
The main feature of the disconnecting switch is that it has no arcing ability and can only open and close the circuit without load current.
The article introduces the function, characteristics, types, applications, error prevention improvement, maintenance, common problems of the isolation switch.

Brief introduction of load switch:

Load switch is a switching appliance between circuit breaker and disconnecting switch. It has a simple arc extinguishing device, which can cut off rated load current and certain overload current, but can not cut off short circuit current.
Load switch classification: according to the use of voltage can be divided into high voltage load switch and low voltage load switch.
Load switches are mainly used to turn on and off load current, or they can be used with high-voltage fuses instead of circuit breakers.
Because of its convenience and reasonable price, load switch is widely used in 10kV distribution system.
Reasonable selection of load switch in design is of great significance to ensure the safety and reliable operation of power grid.