Isolating switch operation

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(1) prohibits the isolation switch to pull together with the load devi ce or with a load line. (2) prohibit the isolation switch opened, close the load transformer. (3) allows the operation of the isolating switch: (a) opened, close the fault voltage transformers and surge arresters. (b) when the system is trouble-free, opened, close the transformer neutral grounding switch c opened, close the impedance of the loop current. d outside triple isolation switch can be opened, close the voltage of 10kV and below, the load current of the current below 9A; more than the above range, must be approved by calculation, testing, and approval by the Chief Engineer of the unit in charge. (5) the power failure operation of the voltage transformer, disconnect the secondary air switch (or remove the secondary fuse), opened the first isolation switch, power transmission, the sequence of operations on the contrary, the primary side of the parallel operation two group of voltage transformers, prohibit the second ary side parallel.