We have speedtronic control for frame-1 GT control. Recently Gas Turbine was stopped for overhauling and after maintenance activities unit was started. however it is continuously tripping during startup at 82% HP speed as soon as 14HS signal appears. At the Same time PCD FAILURE ALARM also appears.
We have checked compressor discharge pressure transmitter PCD which is OK, speed picks, thermocouples and their groundings which are appropriate.
Please find below relevant parameters at the stage where unit trip.
Exhaust average temp = about 390 deg C
PCD = 4.5 bar
HP SPEED = 82%
LP SPEED = 71%
We have attempted to replace calibrated SSKC startup card, STKK cards and tried for startup various times, however results are same.
Please suggest failure cause and its rectification.
Please feel free in case of any query.
Best Regards,
We have checked compressor discharge pressure transmitter PCD which is OK, speed picks, thermocouples and their groundings which are appropriate.
Please find below relevant parameters at the stage where unit trip.
Exhaust average temp = about 390 deg C
PCD = 4.5 bar
HP SPEED = 82%
LP SPEED = 71%
We have attempted to replace calibrated SSKC startup card, STKK cards and tried for startup various times, however results are same.
Please suggest failure cause and its rectification.
Please feel free in case of any query.
Best Regards,