Steam turbine hydraulic pump logic

[Rizwan Siddiqui]

for our Alstom Steam turbine, the hydraulic pumps are kept running after trip or normal stop. can anybody give idea why is it so. I have seen with few other ST OEM, and in their control logic, the hydraulic pumps are not immediately stopped after trip or shutdown.

 

[LittleInch]

To keep whatever they feed alive until the turbine stood out allows for some cooling effect. Give us a bit more here...

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