求翻译：各台变压器的短路阻抗的标幺值相等。是什么意思？

The transformer short-circuit impedance per unit equal.

The short-circuit impedance of the transformers standard 9/11 values are equal.

The transformer copper loss refers to the loss which at the beginning of the secondary wire DC resistance creates, therefore only needs the transformer on to add on the nominal current then, the concrete operation is the secondary coil direct pipe nipple, adds the voltage on a side, amounts to until

Each transformer short circuit impedance equal to the per-unit value.

Each transformer short circuit impedance equal to the per-unit value.