求翻译：电压比相等，其电压比最大允许相差为±5%；是什么意思？

Voltage ratio equal to the voltage than the maximum allowed difference of ± 5%;

Voltage than equivalent, its voltage than the maximum allowed is ± 5% difference;

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

Voltage ratios are equal, its voltage less than the maximum allowed difference of ± 5%;

Voltage ratios are equal, its voltage less than the maximum allowed difference of ± 5%;