The three-phase 380V AC power enters the three-phase four wire ammeter after passing through the EMC and other lightning protection filter modules, and the three-phase four wire ammeter monitors the actual charging energy of the entire charger during operation. According to the actual charging current and charging voltage, the charger often needs to be used in parallel. Therefore, the charger is required to have the function of current sharing output. The charger output directly charges the power battery through the charging gun. When the DC charging pile is working, the auxiliary power supply supplies power to the main control unit, display module, protection control unit, signal acquisition unit, card swiping module and other control systems.
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