It is an interrupter magnet!

这是打扰的磁体。

Vacuum degree of vacuum interrupter on-line monitoring (optional).

灭弧室真空度在线监测（可选）。

The results can provide information for study and design of vacuum interrupter.

得到的结果可以为真空灭弧室的研究和设计提供参考。

Don't get angry with the interrupter if you answered, "Sure!" to their question.

假如你对这个问题回答“当然”的时候，就不要因为被打断而生气。

With sulfur hexafluoride gas to double as insulation interrupter and circuit breaker.

以六氟化硫气体进行灭弧并兼作绝缘用的断路器。