The existing defect of overload, open phase protection of minitype flameproof motor 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。
If no open phase protection is available during the operation course of three-phase equipment, it shall operate abnormally under open phase condition or shall be burnt if the case is serious.
如果不能在运行过程中对三相设备进行缺相保护，则会使三相设备在断相情况下异常工作，轻则设备运行不正常，重则烧毁三相设备。
Based on the analysis of main fault types of LV (Low Voltage) flameproof motor, the negative sequence protection principle is proposed for its asymmetric short circuit fault and open phase fault.
通过分析低压隔爆电动机的主要故障类型，针对不对称性短路故障和断相故障提出了采用负序保护原理进行保护的方案。
The open-phase protection in long-distance motor operation is very important in practice.
电动机远距离运行断相保护在实际工作中很重要。
The invention relates to electromechanical equipment accessories, in particular to an undervoltage open-phase protection contactor.
本发明涉及一种机电设备配件，具体地说是一种欠压断相保护接触器。
The utility model relates to a phase-failure protection, especially relates to an open-phase protector used in the electrical equipment.
本实用新型涉及一种断相保护装置，尤其涉及一种用于电气设备的断相保护器。
The phase-failure protection can be widely used in the electrical equipment without open-phase protection to make the control part free of the unnecessary damage of the open circuit failure.
此断相保护装置可广泛应用于无缺相保护的电气设备中，使设备控制部件免于遭受断路故障的不必要的损坏。
The phase-failure protection can be widely used in the electrical equipment without open-phase protection to make the control part free of the unnecessary damage of the open circuit failure.
此断相保护装置可广泛应用于无缺相保护的电气设备中，使设备控制部件免于遭受断路故障的不必要的损坏。
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