ZW20F -12 outdoor high voltage vacuum circuit breaker (watchdog switch), installed in the responsbility boundary of the overhead distribution line, which is the front end of the user's incoming line, will automatically remove the single- phase ground fault and the phase-to -phase short-circuit fault within the user, avoiding the faults in the user's boundary and the power transmission trunk, and ensuring the safety of the non-faulty users,to improve the reliability of electricity consumption.
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The product is combined with equipment such as FDR type fault detector or RTU remote terminal device to form a distribution automation system with very simple structure, which can realize automatic positioning of overhead line faults and automatic isolation of fault sections.
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