In our gaz plant, we have two gas turbines Frame 5002 A and B, compressors drive.

When we start turbine A, the clutch release at 40% of HP speed and the turbine accelerate with difficulty (hardly).

If any body has similar problem can help us.

we notice also that with Gas turbine B, the clutch release at 64% of HP speed.

 

Are the units electric start or diesel start?
Did this problem just start or has it been building?
Has the unit been recently worked on?

Thanks
Mark Allen

 

control.com has a 'Search' feature cleverly placed on the far right side of the Menu bar at the top of every control.com page. You should always search the site for similar threads and questions as there are a large number of GE-design heavy duty gas turbine-related threads on this site.

Try this one, a very recent thread:

http://www.control.com/thread/1335822948

Write back if you need more assistance. Provide much more information if you write back, such as what you've done to troubleshoot the problem and what the results of the troubleshooting were, what kind of control system, etc.

Lastly, note in the thread that the original poster provided feedback to let others know how the problem was resolved. That's one of the things that makes this forum's threads so useful: Others reading threads can see what worked and what didn't. If you can spare a few minutes to open a thread asking for information or help, you can take a few minutes to provide feedback about the usefulness of the information or how the problem was resolved. 'Feedback is the most important contribution!'(c) here at control.com.

 

Before MI, when we start turbine, at 64%, the clutch disengaged. after MI when we tried to start the turbine, the clutch desangaged at 40 % and the turbine take a lot of time in acceleration.

control systeme is MARK II.

THANK YOU.

 

it is independent of control system, and i think you have gas expanding starting turbine... check the limit switch 33CS, as soon 14HA is attained hydraulic pressure is released in 20CS but the starting turbine is stopped by 33CS intervention off.

other cause could be that the fisher regulator of the starting turbine is not fully open (check the solenoid)