Research On Remote Controlled High-voltage Expulsion Fuses

A high-voltage fuse is a circuit element put there artificially and designed to melt itself when the fault current exceeds some limit, thereby the circuit could be cut off and the electrical equipment could be protected. What is referred to in this thesis is a sort of outdoor high-voltage fuse, named high-voltage explosion fuse.When running normally, a high-voltage explosion fuse is in series with the electrical circuit, the fuse wire is strained and the active joint is locked. When circuitry malfunction happens, the current is so strong that the fuse wire melts and breaks, and the active joint is released, as a result, the fuse tube falls and the electrical circuit is shut off.Application of high-voltage explosion fuses is very abroad. In addition to protecting the electrical equipment by melting itself, disjunction or close of its tube can also be manipulated by a high-voltage insulative stick under some circumstance, for example, to switch on or off no-load overhead transmission line, no-load transformer and little burden current.Because of high-voltage, only after equipping himself with labor insurance things, including insulative gloves, blinkers and insulative shoes, can the operator handle the fuse by a qualified high-voltage insulative stick. Besides, there must be another person protecting him at his side. Due to the great pressure from the spring of upper static interface, it is obvious that there are not only many difficulties, but also many insecure factors in artificial operation, especially when it is raining.Up to now, with the exception of self-falling when fault happens, all disjunction and close of the high-voltage explosion fuse are manipulated manually. Therefore, a set of operating devices of the fuse tube, which works safely and reliably, and can be operated easily, has been the operator's cherished desire for a long time. Our original intention of researching the operating devices is also coming from what has been said above.The experiment set we are researching on is composed of four sections, namely remote control through coded radio, tube close driven by a electromotor, tube disjunction pushed by a electromagnet and power supplied by a single-phase dry-type transformer.