Low-voltage power supply and distribution switching system with double power supply incoming lines and single bus in segmented operation

The utility model discloses a low-voltage power supply and distribution switching system for double-power-supply incoming line single-bus subsection operation, which controls the rapid switching process of a switch through circuit arrangement and a programmable controller with mature and reliable technology, when the operation mode of a low-voltage single-bus subsection system is changed, the switch is switched on and off, and the switch is switched on and off. And therefore, the safety and the reliability of quick switching of the inlet wire isolating switch are effectively guaranteed. The inlet wire isolating switch is cut off by taking the current of the silicon controlled rectifier as a zero point, and the in-phase sequence standby switch is switched on within 1ms, so that seamless and impact-free switching of the three-phase power supply without power failure is realized, the impact influence on running equipment and a power grid in the switching process can be avoided, the operation is simple, and time