注意：严禁空载运行！
一般电动机起动后进行空载运行一小时，试运行中应作全面检查。
Generally, electric motor should be tested for an hour after starting in unloading condition, and a thorough check should be performed.
文中提出了一种不空载运行变压器取得变压器铁心振动信号基频成分的负载电流法。
In this paper, a method extracting cores vibration signal with operating transformer at on-load condition was introduced.
在缝纫机待料待机时，电机通过离合器脱开负载，继续空载运行，造成极大的待机损耗。
When sewing machine work on standby, motor by clutch release load, to continue running light, caused a great deal of standby loss.
黑启动初始阶段，小系统空载运行的情况下，由于逆功率保护而往往发生机组并车失败问题。
When a small system is in on-load operation in the early stage of black start, unit paralleling may fail due to reverse power protection.
当空压机负载率低于25%时，空压机不需要空载运行消耗电能，而可直接停机，将能耗降为零。
With the pressure machine load rate below 25%, air compressor no-load running power consumption need not, and can be directly downtime, energy consumption will be zero.
因此，该流体的差动回路既可提高系统中活塞杆空载运行的速度，又可节能，延长系统使用寿命。
Therefore, the fluid differential circuit can not only increase the speed of the no-load operation of the piston rod in the system, but also save energy, and prolong the service life of the system.
本文论述了励磁控制系统应满足发电机各种运行方式的要求，如负载运行、空载运行、系统故障等不同情况。
The performances of excitation control system must fit all the different operation conditions of generator, such as no load operation, loading, load rejection and different kinds of faults.
本文介绍了变压器铁心振动的起因，提出了一种不必空载运行变压器即可取得变压器铁心振动信号基频成分的方法。
In this paper, the principle of core vibration was described, and a method extracting cores vibration signal without operating transformer at no load condition was introduced.
并就冷态空载、负载运行时间及加热空载、负载运行时间的测量进行讨论和分析。
The running time measurement during both cold and hot states, non-loading and loading states are discussed and analyzed.
其结果表明，此功率因数自动控制系统在空载、欠载运行时节能效果显著。
The simulation results demonstrate that it can save up energy about 30-50% when there is no load or a little load.
其结果表明，此功率因数自动控制系统在空载、欠载运行时节能效果显著。
The simulation results demonstrate that it can save up energy about 30-50% when there is no load or a little load.
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