I have a question regarding turbine interlocks that I’d like to ask everyone!
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Turbine interlock shutdown conditions: differential expansion and displacement. Are there any delays applied to these two conditions by industry professionals?
No delay has been set for these two conditions. .
These strict interlock criteria generally do not have any delay built in. Interlocking means that the limit has been reached; by delaying things, are you trying to cause significant damage?
Why is this expansion difference interlock set up? What is the typical value for the interlock threshold related to expansion difference?
For shaft displacement, a majority vote of two out of three is usually adopted. As for thermal expansion difference, it is less common in ordinary industrial steam turbines; it may be used more frequently in large power station steam turbines. Delay is generally not utilized
Our company uses a two-out-of-two interlock for shaft displacement and vibration; there is no differential expansion, and no delay is involved.