Low-voltage distribution switch and power supply device

A low-voltage distribution switch, comprising:

• a switch module, wherein a plurality of input ends of the switch module serve as voltage inlet wire ends of the low-voltage distribution switch and are configured to correspondingly connect to a multi-phase power supply line;
• the switch module is configured to connect or disconnect the multi-phase power supply line;
• a plurality of current detection modules, wherein input ends of the plurality of current detection modules are correspondingly connected to a plurality of output ends of the switch module;
• output ends of the plurality of current detection modules serve as voltage outlet wire ends of the low-voltage distribution switch and are configured to correspondingly connect to the multi-phase power supply line;
• each of the current detection modules comprises a plurality of current branches and a current detection unit, wherein the plurality of current branches are connected in parallel between the input end and the output end of the corresponding current detection module;
• the current detection unit is configured to detect the current of each current branch to obtain a plurality of branch current detection signals, and obtain a current detection signal of a corresponding phase power supply line on the basis of a plurality of branch current detection signals;
• a voltage detection module, wherein a plurality of input ends of the voltage detection module are connected to a plurality of output ends of the switch module and a neutral line inlet end of the low-voltage distribution switch;
• the neutral line inlet end is configured to connect to a neutral line of the power supply line;
• the voltage detection module is configured to detect a voltage of each phase power supply line of a multi-phase power supply line to obtain a plurality of voltage detection signals;
• and
• a metering module, wherein the metering module is respectively connected to the voltage detection module and a plurality of the current detection units;
• the metering module is configured to sample the plurality of voltage detection signals and the plurality of current detection signals, obtain a plurality of first voltages according to the plurality of voltage detection signals, calculate a plurality of first currents according to the plurality of the current detection signals, and determine first electric energy metering data of the multi-phase power supply line based on the plurality of first voltages and the plurality of first currents.