In a vacuum bulb has a mean voltage has a structure strengthened, dropping funnel and vacuum circuit breaker, such as an alternator disconnector circuit-breaker associated.

摘要

The present invention relates to a new design of the vacuum cartridge according to which is at least in one of the contacts at least one bar in a spacer between the mechanical connection and the circular plate of the contact body so as to prevent the collapse of the latter when a closing operation of the vacuum cartridge and in this closed position. The invention makes it possible to the contacts to withstand compressive forces very high, typically greater than 700kg - force or even 2 tons force.