Steam Turbine Vacuum system.

[emkelgudsanov]

Hello, Newbie here, i have a question about Steam Turbine Vacuum system.

This is our vacuum interlocks

• Jet Water Pump press : 5 - 6 bar
• Vacuum Normal : (-0.86) - (-0.91) bar
• Vacuum alarm water pump : <-0.75 bar
• Turbin trip : -0.61 bar

What might make the vacuum system not work normally and cause a turbine trip? Thx before

[Kelly_Bramble]

Electric motor defective....

[Hudson]

Let us assume you are referring to a ejector style pump, ( like these Attachment 2025 )

It is important to remember that pressure does not equal velocity. So the jet pressure reading can be at normal levels even though there is blockage or erosion of the nozzle.

[emkelgudsanov]

Thx for your answer sir.