Vacuum on -line monitoring system

The utility model provides a vacuum on -line monitoring system has a plurality of electric field probes of installing in the cubical switchboard, and the electric field probe is used for measuring vacuum circuit breaker's phase angle, the electric field probe forms different angles with vacuum circuit breaker, a plurality of electric field probe connection carry out the vector summation with the phase angle information that detects in central controller. The detection information of a plurality of electric fields probe just can judge after the vector is sumd finally whether vacuum satisfies the regulation. Because each electric field probe forms different angles with vacuum circuit breaker, the error that consequently can avoid single position survey of fire hole to arouse makes the measuring result more accurate. And need not break off the circuit during measured data, consequently can satisfy on -line monitoring's requirement. 本实用新型提供了种真空度在线监测系统，具有多个安装于开关柜中的电场探头，电场探头用于测量真空断路器的相位角；电场探头与真空断路器形成不同的角度；多个电场探头连接到