2results about How to "Reliable resection" patented technology

The utility model relates to an internal power supply system of an underground coal mine high-voltage power distribution device, which comprises an input rectifying unit, a first energy storage unit, at least two output circuits and a second energy storage unit, and is arranged in the corresponding high-voltage power distribution device, and the power supply among the internal power supply systems of the high-voltage power distribution devices cannot influence each other. When a certain power supply system goes wrong, the situation that an accident expands cannot occur, and the power supply system does not need to work at high power; the power supply system can supply power to the opening coil, the no-voltage trip coil and the protector through the two output circuits, and the first energy storage unit can be automatically used as a backup power supply under the condition of power failure of the power supply. And under the action of the second energy storage unit, the opening coil can carry out at least one reliable opening operation or the no-voltage tripping coil can carry out at least one reliable no-voltage tripping operation, so that the underground power distribution device can be reliably opened under the condition of alternating current power loss.