Switchboard for Qty 2, 120kW DCFC
Power Distribution Switchboard
A switchboard is a piece of equipment that is designed to help control the supply of power by distributing the energy among a number of load circuits that are able to handle the electricity supply. Switchboards for clean energy projects typically sit between the utility transformer and the clean energy load: EV Charging equipment, Solar PV array, Energy Storage battery, etc.
It is composed of an electrical enclosure and electrical equipment, mainly current transformers, electric meter, busbar, and circuit breakers. A switchboard has voltage, current, and AIC ratings that differentiate them from switchgear.
UL 891 is the standard for switchboards recognized by the electrical industry. UL 891 covers dead-front switchboards, meaning no electrical components are exposed on the front. UL 891 switchboards are rated up to 1,000 V, 6,000 A, and 200 kA.
The picture on the right is a switchboard for one of Sona Energy’s DCFC projects that we own and operate on one of our customer’s property. We are installing 2, 120kW DCFC with 300A cable upgrades. The UL 891 panel has the utility current transformer (CT) compartment on the right of the distribution section and utilizes busbar between sections. The CT section is padlockable and there is a physical barrier between the two sections, as well as a dead-front cover over the circuit breaker compartment. The panel rating is 480 V, 600 A, 50 kA.