In our daily life, charging piles have become an indispensable device for electric vehicle users. However, there are many types of charging piles, the most common of which are single-phase chargers and three-phase chargers. Whether it is a single-phase or three-phase charging pile, you first need to calculate the current of the AC incoming line, and then select the corresponding cable.
For single-phase charging piles (also known as AC chargers), the current is calculated as l = p u, where p represents power and u represents voltage. For example, if the power of the charging station is 7 kW and the voltage is 220 volts, then the current is calculated as l = 7000 220 = 32 amperes. Depending on the size of the current, we can choose a suitable cable. For single-phase charging piles, it is generally recommended to use a 4 square millimeter copper core cable.
For three-phase charging piles (also known as DC charging piles), the formula for calculating the current is l = p (u * 1.).732), where p stands for power, u stands for voltage, 1732 is a constant. Here are some common power three-phase chargers and their corresponding current and cable options:
15 kW with a current of 23 amps, it is recommended to use a cable of 4 square millimeters.
30 kW with a current of 46 amps, it is recommended to use a cable of 10 square millimeters.
60 kW with a current of 92 amps, it is recommended to use a cable of 25 square millimeters.
90 kW with a current of 120 amps, a cable of 35 square millimeters is recommended.
It should be noted that whether it is a single-phase charging pile or a three-phase charging pile, it needs to be equipped with a neutral wire and a ground wire. Therefore, single-phase charging piles require the use of three-core cables, while three-phase charging piles require the use of five-core cables.
To sum up, the current calculation and cable selection of the charging pile are very important. By correctly calculating the current and selecting the right cable, the safe operation of the charging pile can be ensured, and at the same time, it also provides convenience and security for electric vehicle users. Hope you find this information helpful!