Circuit for displaying exception of three-phase shock wave absorber and multi-end fuse
A technology of surge absorbing and indicating circuits, which is applied in the direction of emergency protection circuit devices, circuits, circuit devices, etc. for limiting overcurrent/overvoltage, and can solve the problem that failures of surge absorbing devices cannot be detected and cannot be detected. Problems such as failure of the surge absorbing device 30
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[0012] Please refer to FIG. 2 , which shows a circuit diagram capable of displaying abnormality of a mains three-phase surge absorber according to a preferred embodiment of the present invention. As shown in the figure, the circuit of the present invention includes a first surge absorbing device 40 , a first three-terminal fuse 50 , an abnormality indicating circuit 60 , a second surge absorbing device 70 and a second three-terminal fuse 80 . The first surge absorbing device 40 has a two-terminal temperature sensing fuse 401 that can withstand 139 degrees Celsius and a metal oxide variable resistor 402 . Wherein the first three-terminal fuse 50 and the second three-terminal fuse 80 have a plurality of endpoints, one or more endpoints are added to the two-terminal fuse, and when the first endpoint and the second endpoint of the two-terminal fuse flow through the When the current of the two-terminal fuse is turned on, the third terminal or these terminals are cut at the same tim...
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