When induction motor operates underload especially lower than 20 % the rated load its efficiency and the power factor will drop obviously . So the induction motors carrying lightly for the long time have the very big economy energy space .

异步电机轻 载，尤其是低于20%额定负载率时，其效率和功率因数会明显降低，对于长期轻载 运行的异步电机，存在着很大的节能空间。

Provide protection against overload underload open phase and voltage imbalance ;

提供过载、 欠 载、缺相和电压不平衡保护；

The most common health complaints triggered by underload syndrome are headaches fatigue and recurrent infections ; it is also a cause of mild depression .

该综合症最常见的 病征有头痛、疲劳以及多发性感染，它还有可能引发轻度抑郁。

According to statistical analysis of existing the Honghu tourist data the performance of its tourism environmental loading ratio annual average weak contained low season for tourism is a serious underload the tourist season fitness load the peak tourist overload .

据现有洪湖游客数据统计分析来看，其旅游环境承载率表现为全年平均弱载，旅游淡季严重弱 载，旅游旺季适载，旅游高峰 日有超载现象。

Carbon-laydown occurs seriously in diesel engines on SCR electric drilling rigs during underload Performance which affects the reliability and efficiency of the rigs .

SCR电驱动钻机的柴油发电机组所使用的柴油机，在 低 负荷运行时结碳严重，直接影响钻机的可靠性和经济性。

Experimental analysis about the underload operation of oil fired boiler

燃油锅炉 不能 满 负荷运行的试验分析

Besides in actual engineering most reinforced concrete structures underload work with crack and the crack intensifies durability problems .

然而实际工程中， 荷载 作用 下的大部分混凝土结构 都是带裂缝工作的，裂缝的 出现又加剧了耐久性问题。

People who lack stimulation in their working livesare likely to be depressed and suffer from underload syndrome .

工作上缺少动力的人有可能会表现得抑郁，还可能会患上“动力 不足 综合症”。

Results on crack growth and Sop are presented for CA loading with an overload and with an overload followed bv an underload .

并给出了超载作用下的疲劳裂纹 张开 应 力 的 测量结果。

Research on Adjusting Underload Value of Amperage with Submersible Pump

电泵 井 欠 载 整 定值探讨

In most cases AFC is underload running and its potential can not be brought into full play .

多数情况下， 综采 面输送机是 欠 负荷运行，不能充分发挥其 运输潜力；

Discussion on Underload Operation of Sulphur Recovery Unit

论硫回收装置 低 负荷运行