When all kinds of electronic equipment using electricity breaks down instantaneously, it will not only damage the high price machine, but also affect the start-up of safety devices such as fire alarm device, which becomes a serious problem. Therefore, although there is a method to install the protection device at the input end, the place of use has flowed into the equipment Because it's state, it doesn't help much to protect the machine.In this study, the overheat and short circuit and current protection part, overvoltage suppression part, forward wave tracking unit, overvoltage display unit and ground writing counter part are integrated to play the multi-stage write protection function.In addition, according to the different modules, there are built-in short-circuit and current protection and Hughes to prevent overheating, so as to prevent the protector from damaging fire or explosion caused by excessive use or instantaneous overvoltage. One module is the upper and middle axis, the central axis or the similar, In order to connect on the ground and on the ground, the built-in action status indicator light can be used to read whether the protector is normal or not.In addition, when these modules are combined, in order to combine two symmetrical middle port groups on the printed circuit board, the internal free copy is minimized to obtain low rejection voltage and high write capacity.In addition, when these modules are combined with each other, they form single-phase three wire, three-phase three-wire, three-phase four wire, abnormal voltage suppressor for transition. Each module is equipped with transition current protection and anti overheating shoes for upper, middle and grounding circuits, and action indicator lights are built in The state can be identified with the naked eye.
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