Step down transformers provide low voltage AC power for lighting, instruments and other circuits that use alternating current 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。
Ac Alternating current (ac) is electric current that alternates between a positive maximum value and a negative maximum value at a characteristic frequency, usually 50 or 60 cycles per second (Hertz).
交流交流是指电流在正负最大值之间以特定的频率变动，通常频率为50或60赫兹。
We can also call it an 'alternator', because it generates alternating current (AC).
我们可以也称之为'发电机'，因为它产生交流电(AC)。
AC fault security power source system is to provide alternating current for unit safety shutdown when power cut happens for a long time due to power grid failure or other reasons.
交流事故保安电源系统是当电网发生事故或其他原因致使火电厂厂用电长时间停电时，提供机组安全停机所必需的交流用电系统。
The triggering discharges and the vacuum ultra-violet (VUV) radiation of the five-electrode alternating current plasma display panel (AC PDP) were investigated by fluid model simulations.
采用流体模型研究了一种五电极交流等离子体显示板（ACPDP）的单点触发放电过程及其真空紫外线（VUV）的辐射特性。
Based on the work principle of AC motor, the article analyzes the cause and phenomenon of alternating-current motor and puts forward the method of removing shaft current.
根据交流电动机的工作原理，分析讨论其轴电流产生的原因和表象，提出了防止轴电流产生的方法。
The DC/AC conversion section converts a direct current inputted from a direct current power source into an alternating current, and outputs the alternating current.
该DC /AC转换部分直接转换为电流输入由直流电源成交流电，并输出交流电。
AC是交流电的意思。
Alternating current (AC) : Flow of electric charge that reverses periodically, unlike direct current.
交流电：周期性换向的电流，和直流电不一样。
Inverter is responsible for the direct current into alternating current, AC load equipment to ensure the normal use.
逆变器是负责把直流电转换为交流电，保证交流电负载设备的正常使用。
It is intended primarily for alternating current (ac) power use, but has enough battery back-up power for an hour of operation.
该设备主要适用于交流电源(AC)，但是配备的电池储备电源足够使用1小时。
The contract is part of a larger scheme that includes a 400-kv ac (alternating current) substation in Finnbole, a 70 - km DC overhead line in Sweden and a 200-km submarine cable.
该合同是一个更大计划的一部分，这个计划包括一个位于Finnbole的400千伏交流变电站，一个位于瑞典境内的70千米直流高架线，以及一条200千米的海底电缆。
The contract is part of a larger scheme that includes a 400-kv ac (alternating current) substation in Finnbole, a 70 - km DC overhead line in Sweden and a 200-km submarine cable.
该合同是一个更大计划的一部分，这个计划包括一个位于Finnbole的400千伏交流变电站，一个位于瑞典境内的70千米直流高架线，以及一条200千米的海底电缆。
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