VD4型真空断路器灭弧室漏气故障处理

章介绍某台VD4型断路器灭弧室漏气故障发现、处理的全过程，分析了漏气的原因，提出了应采取的对策；通过对从断路器手车上拆下的灭弧室真空度试验情况分析，指出在现场用磁控法测真空度时应注意的事项。

Fault Handling for Air Leakage of Extinguishing Arc Chamber in VD4 Type Vacuum Circuit Breaker

This paper introduces the course of fault discovery and handling for air leakage of extinguishing arc chamber in VD4 type circuit breaker, and analyzes the reasons of air leakage, and puts forward the countenneasures that should be adopted. Through the analysis of vacuum testing condition in extinguishing arc chamber in the handcart of circuit breaker, the notice that should be paid attention for using magnetic control discharge method on site to measure vacuum degree is pointed out.