A low-voltage power distribution system is a system used to distribute electrical energy from the power source to user terminals according to certain voltage levels and load requirements. Equipment within this system typically has voltage levels of 1000V AC and 1500V DC and below.

A low-voltage power distribution system is a system used to distribute electrical energy from the power source to user terminals according to certain voltage levels and load requirements.

In low-voltage power distribution systems, the insulation performance of circuits and phase sequence of lines are crucial to the normal operation and electrical safety of the distribution system. "Testing, measuring or monitoring equipment for protective measures in low-voltage distribution systems up to 1000V AC and 1500V DC" (GB/T 18216) and "Low-voltage electrical installations - Part 6: Verification" (GB/T 16895.23-2020) put forward clear requirements for the insulation resistance and phase sequence testing of electrical equipment in low-voltage power distribution systems.

The voltage level of equipment within this system is typically 1000V AC and 1500V DC and below.