over load relay 过载保护继电器
Under-load relay 负载不足继电器
over-load relay or release 过载继电器或脱扣器
Over-load relay 过载继电器
thermal over-load relay or release 热过载继电器或脱扣器
no load relay 无载继电器
Motor Over load relay 电机过载继电器 ; 马达过载保护
under load relay 欠载电驿
The article analyzes the operation character and the invalidation mode of thermal over-load relay and puts forward the reliability index and the calculation method of reliability characteristic.
分析了热过载继电器的工作特点及失效模式，提出了热过载继电器的可靠性指标与其可靠性特征量的计算方法，阐述了热过载继电器的可靠性试验方法与可靠性试验设备。
If the load resistor was connected directly across the voltmeter input terminals, the current through the relay contacts would cause a voltage drop and the measured cell voltage would be in error.
如果负载电阻被直接连接到伏特计的输入端子，通过继电器触点的电流会产生电压降，测得的电池电压将存在误差。
Contactor can be easily retro-fitting auxiliary contact group, and appropriate combination of thermal relay to protect the load that may have been circuits.
接触器还可方便地加装辅助触头组，和适当的热继电器组合，保护可能发生过负载的电路之用。
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