In August, 1997 the Combustion Turbine Unit 2 at the Hay Road Power Complex (HRPC) tripped due to end turn shorted coils which resulted in the retaining ring insulation to burn-up and a subsequent ground fault. The ground fault relay operated and tripped the unit. Visual inspection and electrical tests on site of the unit showed that the coil stacks had elongated and the coil bolcking had failed which caused the generator rotor inboard bearing to vibrate with the ensuing ground fault. The generator rotor was removed from the stator and shipped to OEM's Milwaukee shop for removal and replacement of the retaining rings and additional inspection with the required repairs. This was done because the Unit 2 had been scheduled for a Fal outage in order to replace the old retaining rings with the new 18Mn 18Cr material.
展开▼
机译：1997年8月，由于端匝短路线圈，Hay Road Power Complex（HRPC）的燃气轮机2号机组跳闸，导致固定环绝缘层烧坏，并随后发生了接地故障。接地故障继电器操作并使设备跳闸。机组现场目视检查和电气测试表明，线圈组拉长并且线圈螺栓损坏，这导致发电机转子内侧轴承随着随之而来的接地振动发生振动。将发电机转子从定子上拆下，然后运至OEM的密尔沃基工厂，以拆卸和更换固定环，并进行必要的维修检查。这样做是因为2号机组已安排停产，以用新的18Mn 18Cr材料替换旧的固定环。
展开▼
