As we all know, arc short circuit is a serious fault in distribution network, so the time to cut off arc fault is the key. Only a fast arc protection system can provide effective protection methods, and the goal of protection is to protect people's life and property in case of arc fault.

        The electric arc protection system is applicable to medium voltage switchgear and low voltage switchgear. Arc protection system can protect more monitoring points in medium and low voltage switchgear, and can achieve the purpose of saving cost. The removal time of electric arc light is the key factor to reduce the fault damage range: the shorter the tripping time, the smaller the damage.

        After the fault arc light occurs and causes the device to trip, the main control unit can accurately record which arc light probe detects the fault arc light, and can record the three-phase current value at the action time and the fault arc light intensity at the action time in detail.

        The electric arc protection system is composed of arc protection host unit and several acquisition units. The electric arc protection host unit collects the incoming current of the bus, receives the arc signal collected by the arc acquisition unit, collects the switch position, etc., and performs logic operation in real time. In case of arc fault, the arc host unit acts and jumps off the corresponding incoming line or section switch. The arc acquisition unit collects the signal of the arc sensor in real time, and cascades the arc signal to the arc host unit through optical fiber.