另一方面，现代配电网上用于冶炼的电弧炉和铁路牵引机车等波动性负荷，会使电网电压频繁波动，造成电压闪变。
On the other hand, because of the fluctuating load, such as arc furnace and railway traction locomotive, the voltage of the network will frequently fluctuate and lead to voltage flash.
分析大倾角电牵引采煤机液压制动器频繁抱闸的原因，提出的解决方案实用效果良好。
This paper analyses the reasons of frequent abnormal braking on shearer and gives ideas for solving problem which has well effect in practice.
地铁牵引变断路器是地铁牵引供电系统的重要设备，地铁牵引变断路器的机械和电气动作频繁，易于发生故障。
Breaks of the metro traction substation are important equipments that have frequent mechanical and electrical actions, as a result, they are prone to failure.
地铁牵引变断路器是地铁牵引供电系统的重要设备，地铁牵引变断路器的机械和电气动作频繁，易于发生故障。
Breaks of the metro traction substation are important equipments that have frequent mechanical and electrical actions, as a result, they are prone to failure.
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