低压交流电系统中从120到600VAC的电压称为低压。
Low voltage AC system operating voltages from 120 to 600 VAC.
降压变压器低压AC电源提供照明，仪器仪表和其他使用交流电在一个较低的电压的电路。
Step down transformers provide low voltage AC power for lighting, instruments and other circuits that use alternating current at a lower voltage.
特别注意不要将交流电联接在低压控制输入端，比如传感器输入端、逻辑输入与输出端口。
Take particular care not to connect AC supplies to low voltage control inputs such as sensor inputs, logic inputs and outputs.
它采用大功率的SCR组成电压调节电路，这样交流电动机就可以低压起动。
It adopts SCR with large power to establish the voltage adjustment circuit, so the AC motor can be started with low voltage.
它采用大功率的SCR组成电压调节电路，这样交流电动机就可以低压起动。
It adopts SCR with large power to establish the voltage adjustment circuit, so the AC motor can be started with low voltage.
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