由于MRHPS的接点被打开，总风管用气压开关继电器(MRrAPSR)变为非励磁。由此,MRrAPSR的a接点变为打开状态，拉下153K继电器,在将153线为不加压的同时，在别的接点将154D线为不加压，对JTR消...
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我做的测试超小阻值的仪器，一般用来测试开关继电器的接触电阻！
I do ultra-small resistance test equipment, the general used to test the relay switch contact resistance!
需要符合CCC标志的安全产品包括继电器、开关、控制器和高于36伏特的电流接触器。
Safety products subject to the CCC mark include relays, switches, controllers and contactors that operate above 36 volts.
继电器内的浮控开关发动报警信号。
A float operated switch in the relay is used to initiate an alarm signal.
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