A :
Five defenses usually refer to the "five-proof" of high-voltage switchgear or the "five-proof one-way" of the power distribution room. “One way”is keeping in good ventilation. The design principle of the anti-misoperation device is that all high-voltage electrical equipment that may cause misoperation should be equipped with anti-fault devices and corresponding anti-fault electrical locking circuits. High voltage indicators, short circuit and earth fault indicators are key parts for "five-proof"...