When calculating the short-circuit

When calculating the short-circuit current, the calculation formula usually takes the three-phase short-circuit as the calculation condition. There are two commonly used methods, namely the ohm value method and the standard-unit value method. The ohm value method needs to convert the voltage grade when calculating the three-phase short-circuit current, so in practical engineering, the standard-value method is usually used to carry out the three-phase short-circuit current.