To improve the power supply dependable of the distributed network for the exaltation, keep the trouble of the customer side from spreading to the distributed network, developed a kind of feed line terminal protection in the distributed network. According to the statistic result of the fault in customer side, this protect must have over-current and ground protective actions characteristic. It is good to satisfied to go together with the special request of the distribute net. The current device has thrown in to try the movement, satisfied the expect functions and the appearance is good.
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