空间真空环境下密封电磁继电器的触点失效研究

密封电磁继电器有其固有的漏率,在应用于空间真空环境下由于气体泄漏使得其内部气体压力逐渐降低,导致继电器的触点在低气压环境下工作失效(负载切换时)。文章选择国产继电器样品对上述机理进行了试验验证,并对继电器内部气体压力与触点电弧失效的规律进行了研究。

The contact failure of hermetically sealed electromagnetic relays used in space vacuum environment

The leakage rate is an inherent property of hermetically sealed electromagnetic relays.When used in the space vacuum environment,the relay’s inner gas will progressively release and its inner pressure will be reduced gradually.As a result,the relay’s contact points may be switched into a low pressure environment and the contact failure may occur.In order to verify such mechanism,some homemade relay samples are selected and the contact switching experiments are conducted.The arc failure laws of the relay’s contact point switching in a low inner pressure are studied.