Secondary power distribution box for charging station

A secondary power distribution box consolidates and manages power from the main supply to multiple EV chargers, ensuring safe, reliable, and expandable charging infrastructure.OverviewA secondary power distribution box is a critical component in EV charging stations, acting as an intermediary between the main grid connection and individual chargers. It distributes power efficiently, provides circuit protection, and allows for modular expansion of charging points . These boxes can be designed for AC or DC systems, depending on the type of chargers deployed.AC Distribution BoxesFor AC chargers, distribution boards typically include:Main switch fuse and transformer kits for current transformers (CTs)Outgoing fuse switch disconnectors for each chargerSpace for kWh metering and billing metersOutdoor-rated enclosures to avoid the need for indoor electrical rooms, saving space and costExpandable design to add extra incoming or outgoing feeders as the charging park grows AC distribution boards are suitable for home, office, or commercial charging parks with multiple AC wallboxes, providing flexibility and simplified installation.DC Distribution BoxesFor DC fast-charging hubs, the distribution box must handle:High-voltage DC currents (typically 750–1000 VDC)Continuous high current loads (400A+ per circuit)Arc suppression and thermal management to ensure safety and reliabilitySelective fault isolation, so a single charger or cable fault does not shut down the entire hubCopper busbars with sufficient cross-section to limit voltage drop (