The upper and lower limits of the rated power input or rated current shall be marked on the appliance so that the relation between input and voltage is clear.
额定输入功率或额定电流的上限值和下限值应标在器具上，以使得输入功率与电压之间的关系是明确的。
If the Load is less than half of the Rated Power, then the input voltage can be the universal input voltage.
如果实际负载是额定输出功率的一半，则输入电压可以是通用输入电压。
When electric power coupling transformer at input current is less than rated value, public winding can be also overload.
电力自耦变压器在其输入电流均小于额定值时，其公共绕组也可能过负荷。
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