increase in gap voltage at zero speed of axial shift, 110 MW ST


Thread Starter

b k singh

The gap voltage of axial shift was set at -7.6V during installation. after 2 days the JOP was started and stopped. and than LOP was running and Turbine shaft at zero speed. the gap voltage of axial shift were changed from -7.6v at 9.31 to -8.5v at 20.53. please note that the speed of ST is zero and all temp are within 30deg C. the 110MW ST is old and under R&M. last time it was synchronized in 2003.

Please mail me the region behind the such change. is any material property of rotor influence??

the sensor are mounted on fixed support and check nuts are tightened. the wiring are correct and checked many times.