VS1 Vacuum circuit breaker spring-operated mechanism working principle and advantages and disadvantages

VS1 vacuum circuit breaker spring-operated mechanism working principle and advantages and disadvantages

VS1 vacuum circuit breaker spring-operated mechanism working principle
The spring-operated mechanism of VS1 vacuum circuit breaker is composed of four parts: spring energy storage, closing maintenance, breaking maintenance and breaking, with a large number of parts, about 200, using the energy stored by the stretching and contraction of the spring in the mechanism for closing and breaking operation of the circuit breaker. The storage of spring energy is achieved by the operation of the energy storage motor reduction mechanism, while the closing and dividing action of the circuit breaker is controlled by the closing and dividing coil. The key components of the spring-operated mechanism are the dividing spring and the closing spring, which stores the mechanical work of the motor in the closing spring for a short period of time, and then releases the closing spring energy for closing; in the process of dividing, the dividing spring stores energy and is used as the dividing power. Therefore, the energy of the circuit breaker closing and breaking operation depends on the energy stored in the spring and has nothing to do with the size of the electromagnetic force, and does not require a large closing and breaking current.

Advantages of VS1 spring-operated mechanism
① Closing and breaking currents are not large and do not require a high power supply for operation.
② Can be remote electric energy storage, electric close, divide, can also be local manual energy storage, manual close, divide, so in the operating power supply disappeared or in the case of the operating mechanism to refuse electric can also be manual close, divide operation;.
③Fast closing and dividing action, not affected by changes in power supply voltage, and fast automatic reclosing.
④Small power of energy storage motor, can be used in both AC and DC.
⑤ The spring-operated mechanism can make the best match for energy transfer, and make the same operating mechanism common to all kinds of circuit breakers with different breaking current specifications, and choose different energy storage springs, which is cost-effective.

Disadvantages of VS1 spring-operated mechanism of the vacuum circuit breaker
① The structure is more complex, complex manufacturing process, high processing accuracy requirements, manufacturing costs are relatively high.
② Operating impulse, high requirements for the strength of the components.
③ The main reason is that the electric energy storage is not in place, and the spring arm has not yet passed the dead position, the travel switch will remove the power supply from the energy storage motor, which will then be unable to achieve electric closing. As the circuit breaker refuses to close after the operation of the closing button, the auxiliary switch cannot remove the closing circuit in time, which often causes the closing coil to be charged for a long time and burns the closing coil or the travel switch.
④ There is the phenomenon of false tripping, and sometimes the tripping is not in place after the breaking, and it is impossible to judge its closing and dividing position.
⑤ The speed characteristics of the breaking speed are poor.

The spring-operated mechanism overcomes the disadvantages of the electromagnetic operated mechanism in many respects and is now widely used in power distribution systems.