The term IMPEDANCE is applicable only to AC circuits. Its unit of measurement is the ohm.
“感抗”这个术语只适用于交流电路，其测量单位为欧姆。
In ac circuits, the current amplitude changes continuously that the concept of phase or time becomes very important.
在交流电路中，电流的幅度是连续不断地变化的，因此相位和时间的概念变得十分重要了。
In breakers for operation in low-voltage ac circuits, advantage is taken of the voltage required to establish a cathode spot.
用于低压交流回路的断路器，由于在过零换向电压不能满足再次阴极放电起弧的需要，因此具有容易灭 弧的优点。
Voltage detect of three phase AC, the warning of over-voltage, under-voltage, lost phase and power failure, two-way AC circuits switch full-automatically.
三相交流电压检测，过压、欠压、缺相、停电告警，全自动双路交流前换功能；
In breakers for medium-voltage ac circuits, the cathode-spot phenomena may be combined with methods for bringing about the lengthening and deionization of the arc path.
用于中压交流回路中的断路器，利用阴极辉点现象的方法和拉长电弧去游离的方法相结合。
This does not affect performance in DC circuits , but can have an adverse effect in AC circuits because inductance renders the device sensitive to changes in frequency. disadvantages.
在直流电路中这并没有影响，但对交流电路却有反作用，因为感应系数使该器件对频率的变化很敏感。
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。
It is to be noted that Thevenin s theorem applies to AC as well as to DC circuits.
要注意，代文宁定理不仅适用于直流电路，也适用于交流电路。
The main function of rectifier circuits is to convert AC to DC.
整流电路的主要作用是将交流电压转换成直流电压。
This paper introduced the principle of AC-contactor working without noise and offered two series electrical controlling circuits.
本文分析了交流接触器无声运行的工作原理，提出了两类电气控制线路。
This paper introduced the principle of AC-contactor working without noise and offered two series electrical controlling circuits. It is a practicable and energy-saving technology.
本文分析了交流接触器无声运行的工作原理，提出了两类电气控制线路。这是一种实用的节能技术。
The paper introduces the design of the main circuit and protection circuits of 48V/500A all-digital AC speed regulation controller.
本文介绍48V/500A全数字交流调速控制器主电路及其保护电路的设计。
An assistant 380V AC-input and multi-output switching power supply is introduced which is used in thick-film driving circuits for large-power IGBT(Insulated Gate Bipolar Transistor).
介绍了一种用于大功率IGBT厚膜驱动电路的380V系统输入、多路输出辅助开关电源。
Used in integrative energy saving lamps, Electronic ballast and other AC, DC or pulse circuits.
适用于一体化节能灯、电子镇流器及其它电子仪器的交直流或脉冲电路中。
It is recommended that AC power supplies to instruments be protected by fuses or automatic circuit breakers rated at not more than 2 Amperes, and must be separated from any load current circuits.
最好使用交流电源供电，并为设备安装保险丝或额定电流小于2安培的自动断路器，自动断路器还必须与其他负载电流电路分离。
A set of ac power-supply circuits carrying currents of equal frequency with uniformly-spaced phase differences.
一组频率相同，相位彼此相差均匀的交流供电电路。
Widely used in high frequency, DC, AC and pulse circuits.
广泛应用于高频，直流，交流和脉冲电路中。
When performing AC voltage testing on the main circuits, pay special attention during this procedure to voltage transformers, cables, etc.
一次回路试送电，在此过程中，要特别注意电压互感器，电缆等的情况；
The result of experiments indicates that by adopting AC sampling method, the accuracy and stability of the system have been enhanced, and the hardware circuits are simplified.
实验结果表明，采用交流采样方法提高了系统的精度和稳定性，简化了硬件电路。
The present invention also discloses a AC-DC converter controllers, including the primary sampling circuits and digital compensator;
本发明还公开了一种AC-DC变换器的控制器，包括原边采样电路和数字补偿器；
Simultaneously, the ac contactors with the 380v coil or the 220v coil which can safely run in the 220v or the 380v circuits can be reached.
同时还可达到380V线圈或220 V线圈的交流接触器，均可在220v或380 V电路中安全可靠运行。
Non-polar capacitors can be used for both AC or DC circuits.
无极性（或二极性）电解电容器，可使用在交流或直流电路上。
The Rectifiers for the Hull Cell Test are expressly designed units, which utilize filtered circuits capable of continuously producing minimum AC ripple.
我们的这款整流器，专用于薄膜电池测试使用，可连续产生交流波纹。
The electric secondary AC circuit detection method can check secondary circuits such as the transformer and the bus differential protection of a transformer substation.
本发明可实现对变电站的变压器、母差保护等二次回路的检验。
The electric secondary AC circuit detection method can check secondary circuits such as the transformer and the bus differential protection of a transformer substation.
本发明可实现对变电站的变压器、母差保护等二次回路的检验。
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