求翻译：D接法的优点： 对大电流低压绕组而言最经济；与Y接绕组配合使用可以降低零序阻抗值。是什么意思？

D Connection of advantages: low-voltage winding of the high current case the most economical; and Y windings can be reduced with the use of zero sequence impedance.

D law received the advantages: The current low-voltage electrical windings, the most economic; and Y used in conjunction with the winding impedance value can reduce the retail serial number.

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

D-connection advantages: for high-current low-voltage winding is the most economic; and y windings used can reduce the zero-sequence impedance value.

D-connection advantages: for high-current low-voltage winding is the most economic; and y windings used can reduce the zero-sequence impedance value.