断电路 meaning in English

deenergizing

If the vacuum degree of the vacuum interrupter , which is used online in a vacuum breaker , is lower than an amount of magnitude , it will lead to the vacuum breaker cannot switch off normally . this will affect and damage to the power transformer system working in order
运行中的真空开关,其真空灭弧室的真空度若低于一定数量级,就可能导致真空开关不能正常开断电路,而影响配电系统的正常供电,这将造成极大的危害。