Automatic over-current protection devices for communication with a permanent earth fault indication and individual features

摘要

And the subject innovation is limited to that, the current city to automatically detect a more normal current over-current and the like power line crossed the communication line to flow toward the heat exchanger related to communication over current automatic protection device having a separate fault indication and permanent grounding function, and the threshold value when become more persistent over-current flows are and the converter side and the ground side so that the permanent automatically closed state to the protection of over-current which may be flowing toward the heat exchanger, etc. properties of the current limiting element and the fracture, wherein the failure oil, non-identified by an individual fault indication to the protection device to be easily, the exchange system side of the electronic circuit for rapid, can be accurate and safe, as well as operation and maintenance of the communications system to do this the event of a fault can be visually easily confirmed maintenance side extremely effective in, and the like are simplified for higher reliability and a manufacturing process of the product Will be one allows.