Repair lower voltage equipments and power transmission includes tank farm pumps, main workshop and fire fighting water pump. Regular test motor and distribution cabinet insulation.
维修低压设备和给低压设备停送电，包括罐区的泵、主车间泵和消防泵泵。定期测试电机和配电柜的绝缘。
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。
Voltage sags due to line faults, transformer energizing and induction motor starting are main interference sources.
输配电线路故障、变压器投运、感应电动机启动是引起电压凹陷的主要原因。
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