当胀差超过警戒值时，如没有控制汽轮机胀差的有效措施，只能打闸停机。
If the differential expansion is beyond the guard - line and no effective measures are taken to control the differential expansion, the only way is to switch off and stop the turbine.
分析新电公司302号机组打闸拒动的原因，介绍处理这一故障所采取的对策及效果。
Analysis the cause of No. 302 unit shut down valve miss operation. Introduce the measures used to fix the fault and effect.
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