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。我国工频为50Hz。

Active Power Active power is the real power (kW) supplied by the generator set to the electrical load. Active power creates a load on the generator set's engine and is limited by the horsepower of the engine. Active power does the work of heating, turning motor shafts, etc.
有功功率 有功功率（kW），是指发电机组实际供应给负载的功率，它由发电机组的发动机提供，受到发动机马力大小的限制。发热和驱动马达转动靠有功功率完成。

Amortisseur Windings The amortisseur windings of a synchronous AC generator are the conductors embedded in the pole faces of the rotor. They are connected together at both ends of the poles by end rings or end plates. Their function is to dampen waveform distortion during load changes.
阻尼线圈 同步交流发电机的阻尼线圈是指嵌绕在转子磁极间的导线，他们分别在两极用端环或端板相连接，主要功能是减弱因负载变化而引起的波形畸变。

Ampacity Ampacity is the safe current-carrying capacity of an electrical conductor in amperes as defined by code.
载流容量 载流容量是以安培数来定义导线安全载流能力。

Ampere The ampere is a unit of electric current flow. One ampere of current will flow when a potential of one volt is applied across a resistance of one ohm.
安培 安培是电流单位。1伏电压作用于1欧姆的电阻上就会产生1安培的电流。

Apparent Power Apparent power is the product of current and voltage, expressed as kVA. It is real power (kW) divided by the power factor (PF).
视在功率 视在功率是电流和电压共同作用的产物，用kVA表示。它等于有功功率（kW）除以功率因数。

Armature The armature of an AC generator is the assembly of windings and metal core laminations in which the output voltage is induced. It is the stationary part (stator) in a revolving-field generator.
电枢 交流发电机电枢的是金属芯和绕组的总成，产生感应电压。电枢是旋转磁场交流发电机的不动部分（定子）。