Interlock system is in turbine for protect the turbine.
different types of interlocks in turbine 1. high vibration, 2.
Bearing oil Temp,3. vacuum related, 4. over speed, 5. differential
expansion, 6. casing expansion, 7. lube oil header Pressure. 8.
Axil shift. etc... . this interlocks is keep the turbine in safe
mode in any abnormalities.