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See Chinese contents: NB/T 10902-2021 NB/T 10902-2021: 20 kW and below off-board DC charger technical conditions and installation requirements
This document specifies the basic composition, classification, functional requirements, technical conditions, installation requirements, as well as marks, packaging, transportation and storage for 20 kW and below off-board DC chargers (hereinafter referred to as chargers). This document applies to chargers for conductive charging. The rated voltage of its AC power supply is not greater than 440 V. The rated input current is not more than 32 A.
