0.4kV Power System
After the electric power is transmitted through high-voltage circuits, it must be stepped down through various substations, and then distributed through various levels of power distribution systems, and finally enter the end users. Because low-voltage electrical appliances are widely used in low-voltage power distribution systems and play the role of circuit on-off, protection and control, their performance and quality directly affect the safety of power end users and the reliability of the power supply system at the power end.