EV Ultra
Fast Charger Site preparation
5
4
Site preparation
4.1
Power connection
EV Ultra Fast Charger should be connected to 3 phase power line (L, N, PE) with appropriate copper cable.
Device should be protected with dedicated circuit breaker.
Follow below chapters to identify and prepare site for EV Ultra Fast Charger installation.
EV Ultra Fast Charger is equipped with RCD breakers for AC output (AC Type 2 plug, AC Type 2 socket).
To maintain environmental control of device, EV Ultra fast charger should be powered up immediately after
installation. Not powered EV Ultra fast charger may be damaged due to improper environmental conditions.
4.1.1 Circuit breaker rating and cable cross section
The tables below points the recommended fusing and cable cross section. The site planning process must
count with local regulations and codes, exact fusing, cable type and manufacturer. It is recommended to ask
Delta customer service in case of use different ratings. Delta is not responsible for oversizing or undersizing
of cabling and protection.
The maximal AC current is the current draw by charger in case that grid voltage in place of installation is on
lowest allowed limit. Charger operating voltage is 230V/400V±10%, thus lowest voltage limit is 207V/360V.
As the charger is configurable in terms of power steps and charging points, different configuration results in
different charger consumption. To calculate consumption use following general equation:
𝐼𝑛𝑜𝑚 = 𝑞𝑡𝑦 𝑜𝑓 𝑚𝑜𝑑𝑢𝑙𝑒𝑠 × 𝑚𝑜𝑑𝑢𝑙𝑒 𝑛𝑜𝑚𝑖𝑛𝑎𝑙 𝑐𝑢𝑟𝑟𝑒𝑛𝑡 + 𝐴𝐶 𝑠𝑜𝑐𝑘𝑒𝑡 𝑐𝑢𝑟𝑟𝑒𝑛𝑡 + 𝐴𝐶 𝑝𝑙𝑢𝑔 𝑐𝑢𝑟𝑟𝑒𝑛𝑡 + ℎ𝑎𝑙𝑓 𝑐𝑜𝑜𝑙𝑖𝑛𝑔 𝑐𝑢𝑟𝑟𝑒𝑛𝑡
𝐼𝑚𝑎𝑥 = 𝑞𝑡𝑦 𝑜𝑓 𝑚𝑜𝑑𝑢𝑙𝑒𝑠 × 𝑚𝑜𝑑𝑢𝑙𝑒 𝑚𝑎𝑥𝑖𝑚𝑎𝑙 𝑐𝑢𝑟𝑟𝑒𝑛𝑡 + 𝐴𝐶 𝑠𝑜𝑐𝑘𝑒𝑡 𝑐𝑢𝑟𝑟𝑒𝑛𝑡 + 𝐴𝐶 𝑝𝑙𝑢𝑔 𝑐𝑢𝑟𝑟𝑒𝑛𝑡 + 𝑓𝑢𝑙𝑙 𝑐𝑜𝑜𝑙𝑖𝑛𝑔 𝑐𝑢𝑟𝑟𝑒𝑛𝑡
𝑚𝑜𝑑𝑢𝑙𝑒 𝑛𝑜𝑚𝑖𝑛𝑎𝑙 𝑐𝑢𝑟𝑟𝑒𝑛𝑡 = 19,29𝐴,
𝑚𝑜𝑑𝑢𝑙𝑒 𝑚𝑎𝑥𝑖𝑚𝑎𝑙 𝑐𝑢𝑟𝑟𝑒𝑛𝑡 = 21,43𝐴,
𝐴𝐶 𝑠𝑜𝑐𝑘𝑒𝑡 𝑐𝑢𝑟𝑟𝑒𝑛𝑡 = 32𝐴,
𝐴𝐶 𝑝𝑙𝑢𝑔 𝑐𝑢𝑟𝑟𝑒𝑛𝑡 = 63𝐴
ℎ𝑎𝑙𝑓 𝑐𝑜𝑜𝑙𝑖𝑛𝑔 𝑐𝑢𝑟𝑟𝑒𝑛𝑡 = 1𝐴,
𝑓𝑢𝑙𝑙 𝑐𝑜𝑜𝑙𝑖𝑛𝑔 𝑐𝑢𝑟𝑟𝑒𝑛𝑡 = 2𝐴
Example of calculation for charger with 100kW DC charge capacity, 22kW AC and 43kW AC charge capacity:
𝐼𝑛𝑜𝑚 = 8 × 19,29 + 32 + 63 + 1 = 250 𝐴
𝐼𝑚𝑎𝑥 = 8 × 21,43 + 32 + 63 + 2 = 268 𝐴
