The entry with rubber sealing ring are widely used in the design of low-voltage flameproofmotor.
橡胶密封圈式间接引入装置，广泛应用于低压隔爆型电机中。
2
The existing defect of overload, open phase protection of minitype flameproofmotor used in coal mine was analysed and its improved protection scheme was presented.
分析了煤矿井下小型隔爆电动机过载、断相保护存在的缺陷，提出了改进的保护方案。
3
Based on the analysis of main fault types of LV (Low Voltage) flameproofmotor, the negative sequence protection principle is proposed for its asymmetric short circuit fault and open phase fault.