low-voltage protection

The thermal overload relay is a kind of low-voltage protection apparatuses which is widely used in the field of motor protection.

热过载继电器是一种重要的低压保护类电器，广泛应用于电动机的保护领域。

The article gives the analysis about the present low-voltage protection of high-voltage motor, sets forth the existing problems and brings out the proposal for improvement.

对我公司高压电机的低电压保护现状进行分析，指出存在的问题，并提出改进意见。

The switches of the study employed electromechanical combination switches which had the merits of AC contactor and thyristor, the low-voltage protection of transformer employed AC contactors instead of breakers, which were controlled by single chip microcomputer.

研究中采用的电容投切开关是集交流接触器和晶闸管二者优点于一身的机电复合开关，变压器低压侧保护用交流接触器代替断路器，利用单片机进行控制。