The thermal overload relay is a kind of low-voltageprotection 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。
2
The article gives the analysis about the present low-voltageprotection 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。
3
Introduces the constitutes of lowvoltageprotection system of distributing transformer, analyzes the failure reason, puts forward concrete measures of improving lowvoltage protective reliability.