Step down transformers provide low voltage AC power for lighting, instruments and other circuits that use alternatingcurrent at a lower voltage.
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。
2
In the application of above 24V fort currentvoltage grade control circuit, Voltage Alternating and resonant wave interference of input model for Programmable Logic Controllers must be resolved.
可编程控制器在高于24V的直流电压等级控制回路中应用时需解决输入模块的电压变换和谐波干扰等问题。
3
The product of the effective values of the voltage and current with the cosine of the phase Angle between current and voltage in an alternating-current circuit.