Development of a Vacuum Arc Extinguishing Chamber for a Single-Break Vacuum Circuit Breaker for 110 kV

the requirements for high-voltage vacuum circuit breakers for networks with a grounded neutral are formulated, due to the perspective of introducing vacuum circuit breakers into operation in networks with a solidly grounded neutral. Constructive solutions have been proposed for vacuum interrupters for 110 kV, which make it possible to reduce the probability of repeated breakdowns in them, reduce the negative consequences of repeated breakdowns and eliminate the possibility of reducing the electrical strength of the chambers as they deplete their electrical life.The design of a vacuum arc-extinguishing chamber for a 110 kV single-break vacuum circuit breaker has been developed, taking into account the presence of repeated breakdowns. The design of the screen system excludes metallization of the ceramic body, which reduces the electrical strength of the vacuum chamber.