Fuses (fuse) is the time when the current exceeds a predetermined value, in order to melt the heat generated in the fuse itself, an electrical circuit is disconnected, an overcurrent protector. Fuse switch switch fuse, fuse disconnectors, control fuses, fuse switch disconnector and fuse group for maintenance, testing and repair equipment required to disconnect the power line and make the place and a load protection. High voltage switch disconnectors are one of the most used appliances in appliances, by definition, is isolated from the role in the circuit. It is the working principle and structure itself is relatively simple, but due to the use of large, high reliability requirements, the impact of substations, power plant design, build and safe operation are larger. The main features without breaking the ability knife is only in the case of no load current, co-circuits.
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