摘要
介绍高压电动机热过负荷保护的原理、整定计算及试验方法,热过负荷保护已广泛应用于电动机装置,与常规的过电流保护相比较,具有显著优越性和推广应用价值。
The principle,setting calculation and test method of thermal overload protection for high-voltage motor is introduced.Thermal overload protection has been widely used in motor devices.Compared with conventional over-current protection,it has obvious advantages and application value.
作者
万欣
马小娜
WAN Xin;MA Xiaona(Daqing Petrochemical Company Oil Refinery,Daqing 163000,China)
出处
《电气应用》
2021年第4期78-82,共5页
Electrotechnical Application
关键词
电动机
热过负荷
发热时间常数
负序电流
跳闸矩阵
motor
thermal overload
heating time constant
negative sequence current
tripping matrix
