选型常识
发电机组专业术语中英文对照大全（U、V、W、Z）
U Undershoot Undershoot refers to the amount by which voltage or frequency drops below the nominal value as the voltage regulator or governor responds
U
Undershoot
Undershoot refers to the amount by which voltage or frequency drops below the nominal value as the voltage regulator or governor responds to changes in load.
下超调
下超调指电压调整器或控制器在应对负荷变化时，电压或频率低于额定的量。
Utility
The utility is a commercial power source that supplies electrical power to specific facilities from a large central power plant.
市电
市电是商业电源，从大型中央电站向各设施供电。
V
Voltage Control
The voltage control is a rheostat that sets the operating point of the voltage regulator and therefore controls the output voltage of the generator set, within its design limits.
电压控制
电压控制是设定电压调整器的运行点从而在设计范围内控制发电机组的输出电压的变阻器。
Voltage Dip
Voltage dip is the dip in voltage that results when a load is added, occurring before the regulator can correct it, or resulting from the functioning of the voltage regulator to unload an overloaded engine-generator.
电压暂降
电压暂降是在负荷增加而调整器还未能进行校正时、或电压调整器正在为过载的发动机卸载时出现的电压下降。
Voltage Regulation
Voltage regulation is a measure that states the difference between maximum and minimum steady-state voltage as a percentage of nominal voltage.
电压调整率
电压调整率描述的是最大和最小稳态电压差与额定电压之间的百分比。
W
Watt-Hour Meter
A watt-hour meter records the total power output at a specific point in a system. Typical recording increment is in kW-hours.
电度表
电度表记录系统中某一点的总电力输出，通常以千瓦时为记录单位。
Wye Connections
A Wye connection is the same as a star connection. It is a method of interconnecting the phases of a three-phase system to form a configuration resembling the letter Y. A fourth (neutral) wire can be connected at the center point.
Y连接
Y连接就是星形连接，也就是把三相系统中的相按照字母Y的形状连接起来，还可以在中心点接上第四根（中性）线。
Z
Zero Sequence
Zero sequence is a method of ground fault detection that utilizes a sensor (CT) that encircles all the phase conductors as well as the neutral conductors. The sensor will produce an output proportional to the imbalance of ground fault current in the circuit. This output is then measured by a relay to initiate circuit breaker tripping or ground fault alarm.
零序
零序是一种接地故障检测方法，它使用一个传感器（CT）来把所有相导体和中性导体连接在一起，传感器会按照线路中接地故障电流的不平衡程度等比例地产生输出，再由一台继电器来测量这一输出，并断开断路器或释放接地故障警报。