The unstable arc electrical signals of Plasma-MIG were gathered and the result indicates that some contacts exist between inner arc and outer arc .

研究了熔化极等离子弧焊接方法中MIG电流增大对 电弧电信号的影响，并对熔化极等离子弧焊接的 不 稳定 电弧电信号进行了分析，发现内弧对外弧的影响有一定规律性。

On account of the weak fault current and unstable fault arc the problems of the single phase to ground fault line selection in the non-solid earthed network have never been thoroughly resolved .

由于故障电流小、 电弧 不 稳定等原因，小电流接地系统单相故障选线问题始终没有得到彻底解决。

Between the laminar and turbulent jet regimes there exists an unstable transient regime in which the mean jet length decreases with increasing gas flow rate but increases with increasing arc current .

在层流与湍流等离子体射流工况之间，存在一个流动状况 不 稳定的过渡区，此时等离子体射流的平均长度随气流量的加大而减小，但随 弧电流的加大而明显加大。

Analysis on unstable transmission of wear - out arc gears

圆弧齿轮磨损后 非 稳定传动分析

Solution on the Unstable Burning of W Arc - fired Boiler

W 形火焰锅炉燃烧 不 稳的解决措施

This method has higher sensitivity and reliability and free from influences of Petersen coil and unstable arc .

该方法灵敏度、可靠性高，不受消弧线圈和 不 稳定 电弧的影响。

The system proposed is suitable for the distribution automation system and integrated automation system of substations and the detecting method is free from the Petersen-coil and unstable arc influences and capable of detecting special faults i. e. fault feeder with Petersen-coil the network with a closed loop .

该系统结构合理、可适用于配电网自动化系统和变电站自动化系统，检测方法不受消弧线圈、 不 稳定 电弧影响，同时可检测消弧线圈支路接地、网络中存在闭环运行线路等特殊故障。