Vacuum Circuit Breaker Parts

The vacuum interrupter technology was first introduced in the year of 1960.

Vacuum circuit breaker parts.

The technology is suitable for mainly medium voltage application. A vacuum circuit breaker is such kind of circuit breaker where the arc quenching takes place in vacuum. For higher voltage vacuum technology has been developed but not commercially viable. 12 holds the contacts closed due to parts 2 5 6 11 and 14 being placed in an interference fit.

The working of vacuum circuit breakers is briefly explained below. The contacts of a vacuum breaker are enclosed in a ceramic envelope or bottle that is evacuated to an extremely low atmospheric pressure approximately 0023 in. Even with limited rating say 60 to 100mva they are suitable for the majority of applications in rural areas. Vacuum circuit breakers are employed for outdoor applications ranging from 22kv to 66kv.

By embedding the vacuum interrupter in epoxy the assembly is substantially tougher and better suited to withstand impact moisture dust and other. But still it is a developing technology. Vacuum circuit breakers interrupt the arc by denying it air. In a pure vacuum there can be no arc.

The vacuum circuit breaker has mainly two phenomenal properties. When the breaker operates the moving contact separates from the fixed contact and an arc is struck between the contacts. The trip latch 11 holds the. As time goes on the size of the vacuum interrupter has reduced from its early 1960 s size due to different technical developments in this field of engineering.

The operation of opening and closing of current carrying contacts and associated arc interruption take place in a vacuum chamber in the. The vacuum circuit breaker interrupts the current in a vacuum. In comparison to various other insulating. Even though the vacuum in vacuum bottles is very good it isn t perfect so some arcing does take place.

The pressure inside the vacuum interrupter is approximately 10 4 torrent and at this pressure very few molecules are present in the interrupter. You can also choose from high voltage vacuum and moulded. Is pleased to announce the development and availability of replacement vacuum interrupter pole assemblies compatible with older power vac circuit breakers using encapsulated embedded vacuum interrupters.