G
power Gen is controlled by MRK6 (6fA) is trip many time due to lube hider is low l63-1, l63-2, l63-3. is low because sol v/v 20fg is de energized but why we do not know.
Need lots more information. You say Lube Header is low, what does the 163-1/2/3 mean? 20FG dumps control oil and has nothing to do with L.O. I'm guessing, but it looks like you are getting low L.O. pressure trips?? which, of course, will dump 20FG. Please read your P & IDs and give us some better information and we will try and help
Whenever you post a problem to a site like this you should provide as much information as you have in order to receive the fastest and most concise reply, GE. (Hmmm.....)
What have you done to try to troubleshoot the problem? And what were the results of your efforts?
What is the Trip Oil system pressure during operation, prior to a trip event?
When did the problem begin? After a maintenance outage?
What Process- and Diagnostic Alarms are annunciated when the de-energization of 20FG occurs?
Can you post the Trip History file from one of these events to a web-sharing site for review?
If yours is a typical GE-design heavy duty gas turbine, 20FG-1 is connected "between" the TRPG (Primary Gas Turbine Trip Card) and the TREG (Emergency Gas Turbine Trip Card). Loss of the PTRs (Primary Trip Relays) on the TRPG <b>OR</b> loss of the ETRs (Emergency Trip Relays) on the TREG will cause 20FG-1 to be de-energized.
The PTRs are controlled by the application code in <Q> (<R>, <S>, and <T>) and things like high vibration, high L.O. header temperature, loss of flame, etc., can cause the PTRs to be de-energized.
The ETRs are controlled by the VPROs in <P> and are primarily controlled by overspeed detection, but also rate of change of speed can also cause the ETRs to trip. So, faulty, intermittent and/or failing speed pick-ups can cause the ETRs to be de-energized.
The E-Stop Pushbutton(s) are also connected to TREG and can be a source of problem(s). Sometimes there are other trip signals connected to the TREG card at terminals 35 through 48, such as from DCS systems, or boiler drum level switches, etc.
But, EVERY trip--whether it comes from <Q> or from <P> should be accompanied by a Process Alarm. So, please provide a complete list of Process Alarms that occur in the period five seconds before the trip event and five seconds after the trip event.
If there are Diagnostic Alarms present before the trip occurs, please provide a complete list of all of them.
Don't overlook the obvious: loose terminals and poor terminations. Finally, lube oil cleanliness can cause similar problems.
For the best assistance, please provide answers to all of the above questions to the best of your ability. Web-sharing sites others have used to post information for similar threads include tinypic.com and www.speedyshare.com. I believe both of these sites are free. Simply post a Trip Log file from one of these events to either of these sites, or a similar one, and then post the link to the site/file here for people to access the file, review it, and post comments and suggestions.
What have you done to try to troubleshoot the problem? And what were the results of your efforts?
What is the Trip Oil system pressure during operation, prior to a trip event?
When did the problem begin? After a maintenance outage?
What Process- and Diagnostic Alarms are annunciated when the de-energization of 20FG occurs?
Can you post the Trip History file from one of these events to a web-sharing site for review?
If yours is a typical GE-design heavy duty gas turbine, 20FG-1 is connected "between" the TRPG (Primary Gas Turbine Trip Card) and the TREG (Emergency Gas Turbine Trip Card). Loss of the PTRs (Primary Trip Relays) on the TRPG <b>OR</b> loss of the ETRs (Emergency Trip Relays) on the TREG will cause 20FG-1 to be de-energized.
The PTRs are controlled by the application code in <Q> (<R>, <S>, and <T>) and things like high vibration, high L.O. header temperature, loss of flame, etc., can cause the PTRs to be de-energized.
The ETRs are controlled by the VPROs in <P> and are primarily controlled by overspeed detection, but also rate of change of speed can also cause the ETRs to trip. So, faulty, intermittent and/or failing speed pick-ups can cause the ETRs to be de-energized.
The E-Stop Pushbutton(s) are also connected to TREG and can be a source of problem(s). Sometimes there are other trip signals connected to the TREG card at terminals 35 through 48, such as from DCS systems, or boiler drum level switches, etc.
But, EVERY trip--whether it comes from <Q> or from <P> should be accompanied by a Process Alarm. So, please provide a complete list of Process Alarms that occur in the period five seconds before the trip event and five seconds after the trip event.
If there are Diagnostic Alarms present before the trip occurs, please provide a complete list of all of them.
Don't overlook the obvious: loose terminals and poor terminations. Finally, lube oil cleanliness can cause similar problems.
For the best assistance, please provide answers to all of the above questions to the best of your ability. Web-sharing sites others have used to post information for similar threads include tinypic.com and www.speedyshare.com. I believe both of these sites are free. Simply post a Trip Log file from one of these events to either of these sites, or a similar one, and then post the link to the site/file here for people to access the file, review it, and post comments and suggestions.
G
GE
before the first trip<pre>
the Hyd pump A
is trip due to mech problem
and it now is out of service
23-SEP-2011 20:33:29.817 G1 0 L1X EVT Master control - startup permissive
23-SEP-2011 20:33:59.138 G1 1 L3GCV3E EVT GCV3 Valve Output Enable
23-SEP-2011 20:33:59.138 G1 1 L3GCVQE EVT Quaternary Valve Output Enable
23-SEP-2011 20:34:00.218 G1 0 L30FT_M1 EVT Fired Time PM1 Only (Mode 1)
23-SEP-2011 20:34:00.218 G1 1 L30FT_M3 EVT Fired Time PM1 and PM2 (Mode 3)
23-SEP-2011 20:39:24.730 G1 1 L63HG2L SOE Gas Fuel System Hyd Press Switch 2 - Trip Signal
23-SEP-2011 20:39:24.730 G1 1 L63HG3L SOE Gas Fuel System Hyd Press Switch 3 - Alarm Signal
23-SEP-2011 20:39:24.756 G1 1 L63HG1L SOE Gas Fuel System Hyd Press Swicth 1- Trip Signal
23-SEP-2011 20:39:24.782 G1 1 Q 0378 ALM GAS FUEL HYDRAULIC TRIP PRESS LOW
23-SEP-2011 20:39:24.782 G1 0 L4 EVT Master protective signal
23-SEP-2011 20:39:24.782 G1 1 L4T EVT Master Protective Trip
23-SEP-2011 20:39:24.823 G1 0 L20FGX EVT Gas Fuel Stop Valve Command
23-SEP-2011 20:39:24.823 G1 0 L2TV EVT Turbine Vent Timer
23-SEP-2011 20:39:24.823 G1 0 L3 EVT Turbine complete sequence
23-SEP-2011 20:39:24.823 G1 0 L3GRV EVT Gas Fuel Speed Ratio Valve Command Enable
23-SEP-2011 20:39:24.823 G1 0 L4T EVT Master Protective Trip
23-SEP-2011 20:39:24.823 G1 1 L4T1 EVT GT Tripped way1
23-SEP-2011 20:39:24.823 G1 1 L4T2 EVT GT Tripped way2
23-SEP-2011 20:39:24.823 G1 1 L4T3 EVT GT Tripped way3
23-SEP-2011 20:39:24.862 G1 0 Q 0378 ALM GAS FUEL HYDRAULIC TRIP PRESS LOW
23-SEP-2011 20:39:24.862 G1 0 L30FT_M3 EVT Fired Time PM1 and PM2 (Mode 3)
23-SEP-2011 20:39:24.862 G1 0 L3GCV1E EVT GCV1 Valve Output Enable
23-SEP-2011 20:39:24.862 G1 0 L3GCV2E EVT GCV2 Valve Output Enable
23-SEP-2011 20:39:24.862 G1 0 L3GCV3E EVT GCV3 Valve Output Enable
23-SEP-2011 20:39:24.862 G1 0 L3GCVQE EVT Quaternary Valve Output Enable
23-SEP-2011 20:39:24.862 G1 0 L4T1 EVT GT Tripped way1
23-SEP-2011 20:39:24.862 G1 0 L4T2 EVT GT Tripped way2
23-SEP-2011 20:39:24.862 G1 0 L83PS EVT Preselected Load Command
23-SEP-2011 20:39:24.982 G1 0 L28FDC EVT Flame Detector Channel #3
23-SEP-2011 20:39:24.982 G1 0 L28FDD EVT Flame Detector Channel #4
23-SEP-2011 20:39:25.005 G1 0 L52LX1 SOE line circuit breaker position 1
23-SEP-2011 20:39:25.063 G1 1 Q 0335 ALM GENERATOR BREAKER TRIPPED
23-SEP-2011 20:39:25.063 G1 0 L28FD EVT Flame Detected
23-SEP-2011 20:39:25.063 G1 0 L28FDA EVT Flame Detector Channel #1
23-SEP-2011 20:39:25.063 G1 0 L2W EVT Turbine Warmup Timer
23-SEP-2011 20:39:25.063 G1 0 L52GX EVT Generator Breaker Close/Open Status Input
23-SEP-2011 20:39:25.093 G1 1 L33VG11 SOE Gas Fuel Vent Valve Limit Switch
23-SEP-2011 20:39:25.102 G1 0 Q 0152 ALM GT OUT OF EMISSIONS COMPLIANT MODE
23-SEP-2011 20:39:25.102 G1 0 L28FDB EVT Flame Detector Channel #2
23-SEP-2011 20:39:25.223 G1 1 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:25.263 G1 1 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:25.302 G1 1 Q 0841 ALM VIB BN GT BRG #7 RADIAL SHAFT DISPLACEMENT DANGER
23-SEP-2011 20:39:25.915 G1 1 L33CB3O SOE COMPRESSOR BLEED VALVE #1 OPEN
23-SEP-2011 20:39:25.922 G1 1 L33FS1C SOE Gas Fuel Shut Off Valve Close Position
23-SEP-2011 20:39:25.945 G1 1 L33CB1O SOE COMPRESSOR BLEED VALVE #1 OPEN
23-SEP-2011 20:39:26.062 G1 0 Q 0841 ALM VIB BN GT BRG #7 RADIAL SHAFT DISPLACEMENT DANGER
23-SEP-2011 20:39:26.111 G1 0 L33FS2O SOE Gas Fuel Shut Off Valve Open
23-SEP-2011 20:39:26.726 G1 1 L33CB2O SOE COMPRESSOR BLEED VALVE #2 OPEN
23-SEP-2011 20:39:26.941 G1 1 L33CB4O SOE COMPRESSOR BLEED VALVE #2 OPEN
23-SEP-2011 20:39:27.062 G1 0 Q 0335 ALM GENERATOR BREAKER TRIPPED
23-SEP-2011 20:39:27.189 G1 0 L33PS1C SOE Gas Fuel Vent Valve Close Position
23-SEP-2011 20:39:27.234 G1 1 L33PS2O SOE Gas Fuel Vent Valve Open Position
23-SEP-2011 20:39:27.462 G1 1 Q 0321 ALM 88TK RUNNING BELOW MINIMUM OPERATING SPEED
23-SEP-2011 20:39:27.462 G1 0 L14HF EVT Field flashing speed relay
23-SEP-2011 20:39:27.462 G1 0 L14HS EVT HP operating speed signal
23-SEP-2011 20:39:27.482 G1 0 L52TK2 SOE Exhaust Frame Cooling Fan #1 Running
23-SEP-2011 20:39:27.542 G1 0 Q 0321 ALM 88TK RUNNING BELOW MINIMUM OPERATING SPEED
23-SEP-2011 20:39:29.822 G1 0 L4T3 EVT GT Tripped way3
23-SEP-2011 20:39:29.942 G1 0 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:30.542 G1 0 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:30.575 G1 1 L63FG2L SOE Heat Vent Gas Fuel Pressure Low Upstream VSR #2
23-SEP-2011 20:39:30.608 G1 1 L63FG1L SOE Heat Vent Gas Fuel Pressure Low Upstream VSR #1
23-SEP-2011 20:39:31.462 G1 1 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:32.462 G1 0 L14HP EVT Spare speed signal
23-SEP-2011 20:39:36.502 G1 1 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:36.702 G1 0 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:36.942 G1 1 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:37.182 G1 0 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:37.502 G1 1 Q 0521 ALM GAS FUEL MASS FLOW OUT OF RANGE
23-SEP-2011 20:39:37.502 G1 1 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:37.862 G1 0 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:38.223 G1 1 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:38.782 G1 0 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:39.862 G1 1 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:40.742 G1 0 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:41.462 G1 0 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:41.702 G1 1 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:41.782 G1 1 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:41.862 G1 0 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:42.303 G1 0 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:42.566 G1 1 L3CSF1 SOE CSF ready to start
23-SEP-2011 20:39:42.623 G1 1 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:42.902 G1 0 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:43.262 G1 1 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:43.382 G1 0 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:44.019 G1 1 L63TK2L SOE Exhaust Frame Cooling Fan #1 - Low Diff Pressure
23-SEP-2011 20:39:52.302 G1 0 L14HC EVT Auxiliary cranking speed relay
23-SEP-2011 20:40:07.982 G1 1 Q 0925 ALM TURBINE BRG #1 T1 METAL TEMP SENSOR TROUBLE
23-SEP-2011 20:40:08.021 G1 0 Q 0925 ALM TURBINE BRG #1 T1 METAL TEMP SENSOR TROUBLE
23-SEP-2011 20:40:08.061 G1 1 Q 0925 ALM TURBINE BRG #1 T1 METAL TEMP SENSOR TROUBLE
23-SEP-2011 20:40:08.221 G1 1 Q 0926 ALM TURBINE BRG #1 T2 METAL TEMP SENSOR TROUBLE
23-SEP-2011 20:40:08.261 G1 0 Q 0926 ALM TURBINE BRG #1 T2 METAL TEMP SENSOR TROUBLE
23-SEP-2011 20:40:08.341 G1 1 Q 0926 ALM TURBINE BRG #1 T2 METAL TEMP SENSOR TROUBLE
23-SEP-2011 20:40:08.381 G1 0 Q 0926 ALM TURBINE BRG #1 T2 METAL TEMP SENSOR TROUBLE
23-SEP-2011 20:40:08.501 G1 1 Q 0926 ALM TURBINE BRG #1 T2 METAL TEMP SENSOR TROUBLE
23-SEP-2011 20:40:10.382 G1 0 L14HA EVT HP accelerating speed signal</pre>
if you need trip log I have it but how can I send to you
and event log
the Hyd pump A
is trip due to mech problem
and it now is out of service
23-SEP-2011 20:33:29.817 G1 0 L1X EVT Master control - startup permissive
23-SEP-2011 20:33:59.138 G1 1 L3GCV3E EVT GCV3 Valve Output Enable
23-SEP-2011 20:33:59.138 G1 1 L3GCVQE EVT Quaternary Valve Output Enable
23-SEP-2011 20:34:00.218 G1 0 L30FT_M1 EVT Fired Time PM1 Only (Mode 1)
23-SEP-2011 20:34:00.218 G1 1 L30FT_M3 EVT Fired Time PM1 and PM2 (Mode 3)
23-SEP-2011 20:39:24.730 G1 1 L63HG2L SOE Gas Fuel System Hyd Press Switch 2 - Trip Signal
23-SEP-2011 20:39:24.730 G1 1 L63HG3L SOE Gas Fuel System Hyd Press Switch 3 - Alarm Signal
23-SEP-2011 20:39:24.756 G1 1 L63HG1L SOE Gas Fuel System Hyd Press Swicth 1- Trip Signal
23-SEP-2011 20:39:24.782 G1 1 Q 0378 ALM GAS FUEL HYDRAULIC TRIP PRESS LOW
23-SEP-2011 20:39:24.782 G1 0 L4 EVT Master protective signal
23-SEP-2011 20:39:24.782 G1 1 L4T EVT Master Protective Trip
23-SEP-2011 20:39:24.823 G1 0 L20FGX EVT Gas Fuel Stop Valve Command
23-SEP-2011 20:39:24.823 G1 0 L2TV EVT Turbine Vent Timer
23-SEP-2011 20:39:24.823 G1 0 L3 EVT Turbine complete sequence
23-SEP-2011 20:39:24.823 G1 0 L3GRV EVT Gas Fuel Speed Ratio Valve Command Enable
23-SEP-2011 20:39:24.823 G1 0 L4T EVT Master Protective Trip
23-SEP-2011 20:39:24.823 G1 1 L4T1 EVT GT Tripped way1
23-SEP-2011 20:39:24.823 G1 1 L4T2 EVT GT Tripped way2
23-SEP-2011 20:39:24.823 G1 1 L4T3 EVT GT Tripped way3
23-SEP-2011 20:39:24.862 G1 0 Q 0378 ALM GAS FUEL HYDRAULIC TRIP PRESS LOW
23-SEP-2011 20:39:24.862 G1 0 L30FT_M3 EVT Fired Time PM1 and PM2 (Mode 3)
23-SEP-2011 20:39:24.862 G1 0 L3GCV1E EVT GCV1 Valve Output Enable
23-SEP-2011 20:39:24.862 G1 0 L3GCV2E EVT GCV2 Valve Output Enable
23-SEP-2011 20:39:24.862 G1 0 L3GCV3E EVT GCV3 Valve Output Enable
23-SEP-2011 20:39:24.862 G1 0 L3GCVQE EVT Quaternary Valve Output Enable
23-SEP-2011 20:39:24.862 G1 0 L4T1 EVT GT Tripped way1
23-SEP-2011 20:39:24.862 G1 0 L4T2 EVT GT Tripped way2
23-SEP-2011 20:39:24.862 G1 0 L83PS EVT Preselected Load Command
23-SEP-2011 20:39:24.982 G1 0 L28FDC EVT Flame Detector Channel #3
23-SEP-2011 20:39:24.982 G1 0 L28FDD EVT Flame Detector Channel #4
23-SEP-2011 20:39:25.005 G1 0 L52LX1 SOE line circuit breaker position 1
23-SEP-2011 20:39:25.063 G1 1 Q 0335 ALM GENERATOR BREAKER TRIPPED
23-SEP-2011 20:39:25.063 G1 0 L28FD EVT Flame Detected
23-SEP-2011 20:39:25.063 G1 0 L28FDA EVT Flame Detector Channel #1
23-SEP-2011 20:39:25.063 G1 0 L2W EVT Turbine Warmup Timer
23-SEP-2011 20:39:25.063 G1 0 L52GX EVT Generator Breaker Close/Open Status Input
23-SEP-2011 20:39:25.093 G1 1 L33VG11 SOE Gas Fuel Vent Valve Limit Switch
23-SEP-2011 20:39:25.102 G1 0 Q 0152 ALM GT OUT OF EMISSIONS COMPLIANT MODE
23-SEP-2011 20:39:25.102 G1 0 L28FDB EVT Flame Detector Channel #2
23-SEP-2011 20:39:25.223 G1 1 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:25.263 G1 1 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:25.302 G1 1 Q 0841 ALM VIB BN GT BRG #7 RADIAL SHAFT DISPLACEMENT DANGER
23-SEP-2011 20:39:25.915 G1 1 L33CB3O SOE COMPRESSOR BLEED VALVE #1 OPEN
23-SEP-2011 20:39:25.922 G1 1 L33FS1C SOE Gas Fuel Shut Off Valve Close Position
23-SEP-2011 20:39:25.945 G1 1 L33CB1O SOE COMPRESSOR BLEED VALVE #1 OPEN
23-SEP-2011 20:39:26.062 G1 0 Q 0841 ALM VIB BN GT BRG #7 RADIAL SHAFT DISPLACEMENT DANGER
23-SEP-2011 20:39:26.111 G1 0 L33FS2O SOE Gas Fuel Shut Off Valve Open
23-SEP-2011 20:39:26.726 G1 1 L33CB2O SOE COMPRESSOR BLEED VALVE #2 OPEN
23-SEP-2011 20:39:26.941 G1 1 L33CB4O SOE COMPRESSOR BLEED VALVE #2 OPEN
23-SEP-2011 20:39:27.062 G1 0 Q 0335 ALM GENERATOR BREAKER TRIPPED
23-SEP-2011 20:39:27.189 G1 0 L33PS1C SOE Gas Fuel Vent Valve Close Position
23-SEP-2011 20:39:27.234 G1 1 L33PS2O SOE Gas Fuel Vent Valve Open Position
23-SEP-2011 20:39:27.462 G1 1 Q 0321 ALM 88TK RUNNING BELOW MINIMUM OPERATING SPEED
23-SEP-2011 20:39:27.462 G1 0 L14HF EVT Field flashing speed relay
23-SEP-2011 20:39:27.462 G1 0 L14HS EVT HP operating speed signal
23-SEP-2011 20:39:27.482 G1 0 L52TK2 SOE Exhaust Frame Cooling Fan #1 Running
23-SEP-2011 20:39:27.542 G1 0 Q 0321 ALM 88TK RUNNING BELOW MINIMUM OPERATING SPEED
23-SEP-2011 20:39:29.822 G1 0 L4T3 EVT GT Tripped way3
23-SEP-2011 20:39:29.942 G1 0 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:30.542 G1 0 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:30.575 G1 1 L63FG2L SOE Heat Vent Gas Fuel Pressure Low Upstream VSR #2
23-SEP-2011 20:39:30.608 G1 1 L63FG1L SOE Heat Vent Gas Fuel Pressure Low Upstream VSR #1
23-SEP-2011 20:39:31.462 G1 1 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:32.462 G1 0 L14HP EVT Spare speed signal
23-SEP-2011 20:39:36.502 G1 1 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:36.702 G1 0 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:36.942 G1 1 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:37.182 G1 0 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:37.502 G1 1 Q 0521 ALM GAS FUEL MASS FLOW OUT OF RANGE
23-SEP-2011 20:39:37.502 G1 1 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:37.862 G1 0 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:38.223 G1 1 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:38.782 G1 0 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:39.862 G1 1 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:40.742 G1 0 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:41.462 G1 0 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:41.702 G1 1 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:41.782 G1 1 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:41.862 G1 0 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:42.303 G1 0 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:42.566 G1 1 L3CSF1 SOE CSF ready to start
23-SEP-2011 20:39:42.623 G1 1 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:42.902 G1 0 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:43.262 G1 1 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:43.382 G1 0 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:44.019 G1 1 L63TK2L SOE Exhaust Frame Cooling Fan #1 - Low Diff Pressure
23-SEP-2011 20:39:52.302 G1 0 L14HC EVT Auxiliary cranking speed relay
23-SEP-2011 20:40:07.982 G1 1 Q 0925 ALM TURBINE BRG #1 T1 METAL TEMP SENSOR TROUBLE
23-SEP-2011 20:40:08.021 G1 0 Q 0925 ALM TURBINE BRG #1 T1 METAL TEMP SENSOR TROUBLE
23-SEP-2011 20:40:08.061 G1 1 Q 0925 ALM TURBINE BRG #1 T1 METAL TEMP SENSOR TROUBLE
23-SEP-2011 20:40:08.221 G1 1 Q 0926 ALM TURBINE BRG #1 T2 METAL TEMP SENSOR TROUBLE
23-SEP-2011 20:40:08.261 G1 0 Q 0926 ALM TURBINE BRG #1 T2 METAL TEMP SENSOR TROUBLE
23-SEP-2011 20:40:08.341 G1 1 Q 0926 ALM TURBINE BRG #1 T2 METAL TEMP SENSOR TROUBLE
23-SEP-2011 20:40:08.381 G1 0 Q 0926 ALM TURBINE BRG #1 T2 METAL TEMP SENSOR TROUBLE
23-SEP-2011 20:40:08.501 G1 1 Q 0926 ALM TURBINE BRG #1 T2 METAL TEMP SENSOR TROUBLE
23-SEP-2011 20:40:10.382 G1 0 L14HA EVT HP accelerating speed signal</pre>
if you need trip log I have it but how can I send to you
and event log
M
Mohamed Ramadan
Again, when you write you need to tell us what you've done to troubleshoot the problem and what the results of the troubleshooting were.
The Alarm List is a <b>MESS</b>. There are a bunch of Diagnostic Alarms at the top of the list (cleared prior to initiating a START), <b>but</b> how do we know what other Diagnostic Alarms are present?
There is a VTUR Diagnostic Alarm annunciated during the acceleration, but it clears shortly after being annunciated. <b>What was that Diag. Alarm?</b> Why did it come then go? What was done to clear it (if anything)?
It appears the generator breaker closes and then shortly after that (minutes) something causes two of the three Gas Fuel Trip Oil Pressure Switches (63HG-2, & -3) to indicate low trip oil pressure at exactly the same instant. Hmmmm..... That doesn't happen very often. The SOE function reports changes of state of discrete inputs with a 0.001 sec (1 millisecond) degree of accuracy.
26 msec later, the third Gas Fuel Trip Oil Pressure Switch, 63HG-1, indicates low trip oil pressure, and 26 msec later the application initiates a turbine Trip on low gas fuel trip oil pressure.
40 msec later, 20FG-1 is commanded to close.
120 msec later, flame is lost in two of the flame detectors.
If the unit has a Trip Oil Pressure Transducer, have you tried trending the pressure to see what happens prior to one of these events?
It's not clear what L4T1 "GT Tripped way1" and the other two similarly named/described trips are. Granted they came after the Low Trip Oil Pressure Trip, but what the heck are they?
What are the battery supply voltages? Is there a 125 VDC battery ground? What is the interrogation/wetting voltage for the discrete inputs?
Are there any trip inputs connected to the TREG as mentioned previously? If so, what are they?
You are probably going to have to create some kind of "monitor" to determine if the trip is being caused by the PTRs on the TRPG or the ETRs on the TREG.
There have been one or two cases of the Hydraulic Dump Valve (VH5-n, if I recall correctly) failing. Have you examined the dump valve and the solenoid valve to see if they are leaking trip oil?
But, it sure sounds like this unit is being run on a "wing and a prayer" anyway, what with the Hyd. Pump out of service, and who-knows-what Diag. Alarms and all of those nuisance Process Alarms. (Why is the fan starter picking-up and dropping out so fast????)
Anyway, you need to take an orderly approach to the problem by eliminating the possible causes until you arrive at the main one and resolve the problem. Most of the time--barring 125 VDC battery grounds/spikes, and with "normal" Diag. Alarms (though there shouldn't be any in a properly configured and maintained system))--the problem is going to be outside of the Speedtronic turbine control panel. That's been proven time and time again here on control.com.
The Alarm List is a <b>MESS</b>. There are a bunch of Diagnostic Alarms at the top of the list (cleared prior to initiating a START), <b>but</b> how do we know what other Diagnostic Alarms are present?
There is a VTUR Diagnostic Alarm annunciated during the acceleration, but it clears shortly after being annunciated. <b>What was that Diag. Alarm?</b> Why did it come then go? What was done to clear it (if anything)?
It appears the generator breaker closes and then shortly after that (minutes) something causes two of the three Gas Fuel Trip Oil Pressure Switches (63HG-2, & -3) to indicate low trip oil pressure at exactly the same instant. Hmmmm..... That doesn't happen very often. The SOE function reports changes of state of discrete inputs with a 0.001 sec (1 millisecond) degree of accuracy.
26 msec later, the third Gas Fuel Trip Oil Pressure Switch, 63HG-1, indicates low trip oil pressure, and 26 msec later the application initiates a turbine Trip on low gas fuel trip oil pressure.
40 msec later, 20FG-1 is commanded to close.
120 msec later, flame is lost in two of the flame detectors.
If the unit has a Trip Oil Pressure Transducer, have you tried trending the pressure to see what happens prior to one of these events?
It's not clear what L4T1 "GT Tripped way1" and the other two similarly named/described trips are. Granted they came after the Low Trip Oil Pressure Trip, but what the heck are they?
What are the battery supply voltages? Is there a 125 VDC battery ground? What is the interrogation/wetting voltage for the discrete inputs?
Are there any trip inputs connected to the TREG as mentioned previously? If so, what are they?
You are probably going to have to create some kind of "monitor" to determine if the trip is being caused by the PTRs on the TRPG or the ETRs on the TREG.
There have been one or two cases of the Hydraulic Dump Valve (VH5-n, if I recall correctly) failing. Have you examined the dump valve and the solenoid valve to see if they are leaking trip oil?
But, it sure sounds like this unit is being run on a "wing and a prayer" anyway, what with the Hyd. Pump out of service, and who-knows-what Diag. Alarms and all of those nuisance Process Alarms. (Why is the fan starter picking-up and dropping out so fast????)
Anyway, you need to take an orderly approach to the problem by eliminating the possible causes until you arrive at the main one and resolve the problem. Most of the time--barring 125 VDC battery grounds/spikes, and with "normal" Diag. Alarms (though there shouldn't be any in a properly configured and maintained system))--the problem is going to be outside of the Speedtronic turbine control panel. That's been proven time and time again here on control.com.
P
Process Value
>Please see
>http://www.speedyshare.com/files/30491755/event_log2.doc
GT mark VI trip
I am editing out the important alarms and posting it here ; might be mundane for experienced guys but i think this will help the new comers.
This is where the turbine was started i believe , the min speed signal is high and the turning gear motor status goes to zero.<pre>
23-SEP-2011 20:13:27.527 G1 1 L14HM EVT Minimum speed signal
23-SEP-2011 20:13:27.556 G1 0 L52TG1 SOE Turning gear motor status
23-SEP-2011 20:13:31.292 G1 1 L52BT2 SOE Heat Vent Turb Compt Fan Motor#2 Running
23-SEP-2011 20:13:31.851 G1 0 L33BT2 SOE Heat Vent Turb Compt#2 Pos Switch Close
23-SEP-2011 20:13:32.849 G1 1 L33BT1 SOE Heat Vent Turb Compt#1 Pos Switch Close
23-SEP-2011 20:14:26.796 G1 1 L33FS2O SOE Gas Fuel Shut Off Valve Open
23-SEP-2011 20:14:26.817 G1 0 L63FG2L SOE Heat Vent Gas Fuel Pressure Low Upstream VSR #2
23-SEP-2011 20:14:26.822 G1 0 L63FG1L SOE Heat Vent Gas Fuel Pressure Low Upstream VSR #1
23-SEP-2011 20:14:26.847 G1 0 Q 0254 ALM HEAT VENT GAS PRESS ULTRA LOW DOWNSTREAM SSOV
23-SEP-2011 20:14:26.918 G1 1 L63GSD1H SOE Gas Fuel Scrubber 101FI High Diff Pressure
23-SEP-2011 20:14:26.967 G1 1 Q 0375 ALM GAS FUEL SCRUBBER GAS 101FI DIFF PRESS HIGH
23-SEP-2011 20:14:27.012 G1 0 L33FS1C SOE Gas Fuel Shut Off Valve Close Position
23-SEP-2011 20:14:27.167 G1 0 Q 0521 ALM GAS FUEL MASS FLOW OUT OF RANGE
23-SEP-2011 20:14:27.632 G1 0 L63GSD1H SOE Gas Fuel Scrubber 101FI High Diff Pressure
23-SEP-2011 20:14:27.687 G1 0 Q 0375 ALM GAS FUEL SCRUBBER GAS 101FI DIFF PRESS HIGH
23-SEP-2011 20:14:28.121 G1 0 L33VG11 SOE Gas Fuel Vent Valve Limit Switch
23-SEP-2011 20:14:42.567 G1 1 Q 0521 ALM GAS FUEL MASS FLOW OUT OF RANGE
23-SEP-2011 20:14:57.967 G1 1 L3GRV EVT Gas Fuel Speed Ratio Valve Command Enable
23-SEP-2011 20:14:58.631 G1 0 L52VL2 SOE Heat Vent Gas/DLN Compt Fan Motor#2 Running
23-SEP-2011 20:14:58.681 G1 1 L52VL1 SOE Heat Vent Gas/DLN Compt Fan Motor#1 Running
23-SEP-2011 20:14:59.367 G1 0 Q 0521 ALM GAS FUEL MASS FLOW OUT OF RANGE
23-SEP-2011 20:15:00.354 G1 0 L33VL1 SOE Heat Vent Gas/DLN Compt#1 Pos Switch Close
23-SEP-2011 20:15:03.967 G1 0 L3GRV EVT Gas Fuel Speed Ratio Valve Command Enable
23-SEP-2011 20:15:04.128 G1 1 Q 0521 ALM GAS FUEL MASS FLOW OUT OF RANGE
23-SEP-2011 20:15:06.231 G1 0 L52BT2 SOE Heat Vent Turb Compt Fan Motor#2 Running
23-SEP-2011 20:15:06.291 G1 1 L52BT1 SOE Heat Vent Turb Compt Fan Motor#1 Running
23-SEP-2011 20:15:06.333 G1 0 L86BT1X SOE Turb comp vent fan #2 undercurrent
23-SEP-2011 20:15:08.477 G1 0 L33BT1 SOE Heat Vent Turb Compt#1 Pos Switch Close
23-SEP-2011 20:15:09.301 G1 1 L33VL2 SOE Heat Vent Gas/DLN Compt#2 Pos Switch Close
23-SEP-2011 20:15:14.234 G1 1 L33VG11 SOE Gas Fuel Vent Valve Limit Switch
23-SEP-2011 20:15:15.931 G1 1 L33BT2 SOE Heat Vent Turb Compt#2 Pos Switch Close
23-SEP-2011 20:15:47.007 G1 1 Q 0241 ALM START UP GAS LEAK TEST COMPLETE</pre>
This is where the air purging/venting sequence is completed, and the ignition permissive goes high. the ignition exciter is turned on the SRV and GCV opens and the firing takes place, subsequently followed by the flame detection.<pre>
23-SEP-2011 20:22:35.412 G1 1 L2TV EVT Turbine Vent Timer
23-SEP-2011 20:24:12.813 G1 1 L2TVX EVT Ignition Permissive
23-SEP-2011 20:24:12.836 G1 1 L30SG1 SOE Ignition Exciter On - Channel Fault
23-SEP-2011 20:24:12.853 G1 1 L3GCV1E EVT GCV1 Valve Output Enable
23-SEP-2011 20:24:12.853 G1 1 L3GCV2E EVT GCV2 Valve Output Enable
23-SEP-2011 20:24:12.853 G1 1 L3GRV EVT Gas Fuel Speed Ratio Valve Command Enable
23-SEP-2011 20:24:14.933 G1 0 Q 0241 ALM START UP GAS LEAK TEST COMPLETE
23-SEP-2011 20:24:14.933 G1 1 L28FD EVT Flame Detected
23-SEP-2011 20:24:14.933 G1 1 L28FDC EVT Flame Detector Channel #3
23-SEP-2011 20:24:14.933 G1 1 L28FDD EVT Flame Detector Channel #4
23-SEP-2011 20:24:14.973 G1 1 L28FDB EVT Flame Detector Channel #2
23-SEP-2011 20:24:14.973 G1 1 L30FT_M3 EVT Fired Time PM1 and PM2 (Mode 3)
23-SEP-2011 20:24:15.053 G1 1 L28FDA EVT Flame Detector Channel #1
23-SEP-2011 20:24:15.083 G1 0 L33VG11 SOE Gas Fuel Vent Valve Limit Switch
23-SEP-2011 20:24:22.853 G1 0 L2TVX EVT Ignition Permissive
23-SEP-2011 20:24:23.150 G1 0 L30SG1 SOE Ignition Exciter On - Channel Fault</pre>
turbine enters the warmup phase , and then reaches the accelerating speed. <pre>
23-SEP-2011 20:24:34.932 G1 1 L2W EVT Turbine Warmup Timer
23-SEP-2011 20:24:42.133 G1 1 L30FT_M2 EVT Fired Time PM2 Only (Mode 2)
23-SEP-2011 20:24:42.133 G1 0 L30FT_M3 EVT Fired Time PM1 and PM2 (Mode 3)
23-SEP-2011 20:26:10.374 G1 0 Q 0521 ALM GAS FUEL MASS FLOW OUT OF RANGE
23-SEP-2011 20:27:21.734 G1 1 L14HA EVT HP accelerating speed signal</pre>
Here the l14HS is mostly the min HP operating speed of the machine , kept at 95% . thus at this point the machine has reached 95% speed and L3=1 signifies that the turbine startup sequence is complete.<pre>
23-SEP-2011 20:30:07.925 G1 0 L52CSF1 SOE CSF Breaker closed
23-SEP-2011 20:30:07.976 G1 1 Q 0326 ALM CSF BREAKER CLOSURE TROUBLE
23-SEP-2011 20:30:08.015 G1 1 L14HC EVT Auxiliary cranking speed relay
23-SEP-2011 20:30:09.879 G1 0 L52Q91 SOE Isolation position breaker
23-SEP-2011 20:30:32.817 G1 1 L14HP EVT Spare speed signal
23-SEP-2011 20:30:42.616 G1 1 L14HF EVT Field flashing speed relay
23-SEP-2011 20:30:42.616 G1 1 L14HS EVT HP operating speed signal
23-SEP-2011 20:30:42.672 G1 1 L52TK2 SOE Exhaust Frame Cooling Fan #1 Running
23-SEP-2011 20:30:45.136 G1 0 L30FT_M2 EVT Fired Time PM2 Only (Mode 2)
23-SEP-2011 20:30:45.136 G1 1 L30FT_M3 EVT Fired Time PM1 and PM2 (Mode 3)
23-SEP-2011 20:30:47.728 G1 0 L63TK2L SOE Exhaust Frame Cooling Fan #1 - Low Diff Pressure
23-SEP-2011 20:30:49.775 G1 1 L3 EVT Turbine complete sequence</pre>
I am taking a guess here, and this also answers CSA's VTUR diagnostic alarm. This most probably would have happened when switching on the "synchroniser" selection. The VTUR has the PT signals from the bus and the machine, when the synchronise selection (manual or auto) is selected on the PT signal from the Bus is driven via a aux relay to the mark VI panel. this can also happen during switching off off of the synchroniser and also during the sync time depending on how the diagnostic alarm is configured. The generator is synchronised at 20:32:59.730 as the l52Lx1 is showing 1.
Note * - An interesting thing here is that the compressor bleed off valve which i have seen closes at 95% speed is closing after the breaker close.
After the sync the unit is put in preselect load. <pre>
23-SEP-2011 20:32:31.897 G1 1 L30FT_M1 EVT Fired Time PM1 Only (Mode 1)
23-SEP-2011 20:32:31.897 G1 0 L30FT_M3 EVT Fired Time PM1 and PM2 (Mode 3)
23-SEP-2011 20:32:41.497 G1 1 Q 0604 ALM <S> SLOT 10 VTUR DIAGNOSTIC ALARM
23-SEP-2011 20:32:59.730 G1 1 L52LX1 SOE line circuit breaker position 1
23-SEP-2011 20:32:59.777 G1 1 L52GX EVT Generator Breaker Close/Open Status Input
23-SEP-2011 20:32:59.817 G1 1 Q 0152 ALM GT OUT OF EMISSIONS COMPLIANT MODE
23-SEP-2011 20:33:00.310 G1 0 L33CB1O SOE COMPRESSOR BLEED VALVE #1 OPEN
23-SEP-2011 20:33:00.682 G1 0 L33CB3O SOE COMPRESSOR BLEED VALVE #1 OPEN
23-SEP-2011 20:33:02.257 G1 0 L33CB2O SOE COMPRESSOR BLEED VALVE #2 OPEN
23-SEP-2011 20:33:02.594 G1 0 L33CB4O SOE COMPRESSOR BLEED VALVE #2 OPEN
23-SEP-2011 20:33:09.577 G1 1 L83PS EVT Preselected Load Command
23-SEP-2011 20:33:29.817 G1 0 L1X EVT Master control - startup permissive</pre>
This is where the trouble starts. the gas fuel low trip oil pressure switch goes high initiating the trip. The turbine tripped here<pre>
"20:39:24.782 G1 0 L4 EVT Master protective signal"</pre>as this is the place where the L4 goes to zero.<pre>
23-SEP-2011 20:33:59.138 G1 1 L3GCV3E EVT GCV3 Valve Output Enable
23-SEP-2011 20:33:59.138 G1 1 L3GCVQE EVT Quaternary Valve Output Enable
23-SEP-2011 20:34:00.218 G1 0 L30FT_M1 EVT Fired Time PM1 Only (Mode 1)
23-SEP-2011 20:34:00.218 G1 1 L30FT_M3 EVT Fired Time PM1 and PM2 (Mode 3)
23-SEP-2011 20:39:24.730 G1 1 L63HG2L SOE Gas Fuel System Hyd Press Switch 2 - Trip Signal
23-SEP-2011 20:39:24.730 G1 1 L63HG3L SOE Gas Fuel System Hyd Press Switch 3 - Alarm Signal
23-SEP-2011 20:39:24.756 G1 1 L63HG1L SOE Gas Fuel System Hyd Press Swicth 1- Trip Signal
23-SEP-2011 20:39:24.782 G1 1 Q 0378 ALM GAS FUEL HYDRAULIC TRIP PRESS LOW
23-SEP-2011 20:39:24.782 G1 0 L4 EVT Master protective signal
23-SEP-2011 20:39:24.782 G1 1 L4T EVT Master Protective Trip
23-SEP-2011 20:39:24.823 G1 0 L20FGX EVT Gas Fuel Stop Valve Command
23-SEP-2011 20:39:24.823 G1 0 L2TV EVT Turbine Vent Timer
23-SEP-2011 20:39:24.823 G1 0 L3 EVT Turbine complete sequence
23-SEP-2011 20:39:24.823 G1 0 L3GRV EVT Gas Fuel Speed Ratio Valve Command Enable
23-SEP-2011 20:39:24.823 G1 0 L4T EVT Master Protective Trip
23-SEP-2011 20:39:24.823 G1 1 L4T1 EVT GT Tripped way1
23-SEP-2011 20:39:24.823 G1 1 L4T2 EVT GT Tripped way2
23-SEP-2011 20:39:24.823 G1 1 L4T3 EVT GT Tripped way3</pre>
It is seen here that the cause of the trip "GAS FUEL HYDRAULIC TRIP PRESS LOW" resets ie at least two of the three switches have been reset. thus the signal which goes high causing the trip resets in 80ms. then of course is the usual alarms which come during the shutdown sequence.<pre>
23-SEP-2011 20:39:24.862 G1 0 Q 0378 ALM GAS FUEL HYDRAULIC TRIP PRESS LOW
23-SEP-2011 20:39:24.862 G1 0 L30FT_M3 EVT Fired Time PM1 and PM2 (Mode 3)
23-SEP-2011 20:39:24.862 G1 0 L3GCV1E EVT GCV1 Valve Output Enable
23-SEP-2011 20:39:24.862 G1 0 L3GCV2E EVT GCV2 Valve Output Enable
23-SEP-2011 20:39:24.862 G1 0 L3GCV3E EVT GCV3 Valve Output Enable
23-SEP-2011 20:39:24.862 G1 0 L3GCVQE EVT Quaternary Valve Output Enable
23-SEP-2011 20:39:24.862 G1 0 L4T1 EVT GT Tripped way1
23-SEP-2011 20:39:24.862 G1 0 L4T2 EVT GT Tripped way2
23-SEP-2011 20:39:24.862 G1 0 L83PS EVT Preselected Load Command
23-SEP-2011 20:39:24.982 G1 0 L28FDC EVT Flame Detector Channel #3
23-SEP-2011 20:39:24.982 G1 0 L28FDD EVT Flame Detector Channel #4
23-SEP-2011 20:39:25.005 G1 0 L52LX1 SOE line circuit breaker position 1
23-SEP-2011 20:39:25.063 G1 1 Q 0335 ALM GENERATOR BREAKER TRIPPED
23-SEP-2011 20:39:25.063 G1 0 L28FD EVT Flame Detected
23-SEP-2011 20:39:25.063 G1 0 L28FDA EVT Flame Detector Channel #1
23-SEP-2011 20:39:25.063 G1 0 L2W EVT Turbine Warmup Timer
23-SEP-2011 20:39:25.063 G1 0 L52GX EVT Generator Breaker Close/Open Status Input
23-SEP-2011 20:39:25.093 G1 1 L33VG11 SOE Gas Fuel Vent Valve Limit Switch
23-SEP-2011 20:39:25.102 G1 0 Q 0152 ALM GT OUT OF EMISSIONS COMPLIANT MODE
23-SEP-2011 20:39:25.102 G1 0 L28FDB EVT Flame Detector Channel #2
23-SEP-2011 20:39:25.223 G1 1 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:25.263 G1 1 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:25.302 G1 1 Q 0841 ALM VIB BN GT BRG #7 RADIAL SHAFT DISPLACEMENT DANGER
23-SEP-2011 20:39:25.915 G1 1 L33CB3O SOE COMPRESSOR BLEED VALVE #1 OPEN
23-SEP-2011 20:39:25.922 G1 1 L33FS1C SOE Gas Fuel Shut Off Valve Close Position
23-SEP-2011 20:39:25.945 G1 1 L33CB1O SOE COMPRESSOR BLEED VALVE #1 OPEN
23-SEP-2011 20:39:26.062 G1 0 Q 0841 ALM VIB BN GT BRG #7 RADIAL SHAFT DISPLACEMENT DANGER
23-SEP-2011 20:39:26.111 G1 0 L33FS2O SOE Gas Fuel Shut Off Valve Open
23-SEP-2011 20:39:26.726 G1 1 L33CB2O SOE COMPRESSOR BLEED VALVE #2 OPEN
23-SEP-2011 20:39:26.941 G1 1 L33CB4O SOE COMPRESSOR BLEED VALVE #2 OPEN
23-SEP-2011 20:39:27.062 G1 0 Q 0335 ALM GENERATOR BREAKER TRIPPED
23-SEP-2011 20:39:27.189 G1 0 L33PS1C SOE Gas Fuel Vent Valve Close Position
23-SEP-2011 20:39:27.234 G1 1 L33PS2O SOE Gas Fuel Vent Valve Open Position
23-SEP-2011 20:39:27.462 G1 1 Q 0321 ALM 88TK RUNNING BELOW MINIMUM OPERATING SPEED
23-SEP-2011 20:39:27.462 G1 0 L14HF EVT Field flashing speed relay
23-SEP-2011 20:39:27.462 G1 0 L14HS EVT HP operating speed signal
23-SEP-2011 20:39:27.482 G1 0 L52TK2 SOE Exhaust Frame Cooling Fan #1 Running
23-SEP-2011 20:39:27.542 G1 0 Q 0321 ALM 88TK RUNNING BELOW MINIMUM OPERATING SPEED
23-SEP-2011 20:39:29.822 G1 0 L4T3 EVT GT Tripped way3</pre>
Trip analysis
I do not have your PID's so please bear with me if there are any mistakes in the assumptions i am making.
The trip oil pressure is supplied from the Lube oil "pump" header. and i believe that the trip oil setting is 0.56 kg. If there was a problem with the lube oil pump then there would have been an alarm in the lube oil circuit, the AOP would have come etc. It has not so i would rule out the Lube oil pump for now.
But you can check the trend if there was any fall in the MOP discharge pressure during the trip.
This has to be an isolated problem with the trip oil circuit. All three switches pick up at the same instant. Is this a retrofitted machine. In such cases i have seen that during an upgrade from markiV or Mark V which had one trip oil switch , on upgrading to mark VI which "needed" three , the other switches were connected to the same take off. This might also happen if the take offs are very near. Did the machine come after maintenance ?? from the above i have the following recommendations
1. check the trip oil filter DP , it might be deceptively low , run the AOP and "force the dump solenoid" (during machine down time) so that the trip oil pressure gauge in the field shows the trip oil value. if this is low then change the trip oil filters.
2. If possible flush the trip oil header.
3. Clean / flush the trip oil pressure switches take off (choked take off is the biggest culprit after a maintenance)
before starting the machine as i said make sure that there is adequate trip oil pressure available.
this seems like a mechanical problem than a instrumentation problem, but you can also calibrate the switches and make the plant management happy.
happy trouble shooting
>http://www.speedyshare.com/files/30491755/event_log2.doc
GT mark VI trip
I am editing out the important alarms and posting it here ; might be mundane for experienced guys but i think this will help the new comers.
This is where the turbine was started i believe , the min speed signal is high and the turning gear motor status goes to zero.<pre>
23-SEP-2011 20:13:27.527 G1 1 L14HM EVT Minimum speed signal
23-SEP-2011 20:13:27.556 G1 0 L52TG1 SOE Turning gear motor status
23-SEP-2011 20:13:31.292 G1 1 L52BT2 SOE Heat Vent Turb Compt Fan Motor#2 Running
23-SEP-2011 20:13:31.851 G1 0 L33BT2 SOE Heat Vent Turb Compt#2 Pos Switch Close
23-SEP-2011 20:13:32.849 G1 1 L33BT1 SOE Heat Vent Turb Compt#1 Pos Switch Close
23-SEP-2011 20:14:26.796 G1 1 L33FS2O SOE Gas Fuel Shut Off Valve Open
23-SEP-2011 20:14:26.817 G1 0 L63FG2L SOE Heat Vent Gas Fuel Pressure Low Upstream VSR #2
23-SEP-2011 20:14:26.822 G1 0 L63FG1L SOE Heat Vent Gas Fuel Pressure Low Upstream VSR #1
23-SEP-2011 20:14:26.847 G1 0 Q 0254 ALM HEAT VENT GAS PRESS ULTRA LOW DOWNSTREAM SSOV
23-SEP-2011 20:14:26.918 G1 1 L63GSD1H SOE Gas Fuel Scrubber 101FI High Diff Pressure
23-SEP-2011 20:14:26.967 G1 1 Q 0375 ALM GAS FUEL SCRUBBER GAS 101FI DIFF PRESS HIGH
23-SEP-2011 20:14:27.012 G1 0 L33FS1C SOE Gas Fuel Shut Off Valve Close Position
23-SEP-2011 20:14:27.167 G1 0 Q 0521 ALM GAS FUEL MASS FLOW OUT OF RANGE
23-SEP-2011 20:14:27.632 G1 0 L63GSD1H SOE Gas Fuel Scrubber 101FI High Diff Pressure
23-SEP-2011 20:14:27.687 G1 0 Q 0375 ALM GAS FUEL SCRUBBER GAS 101FI DIFF PRESS HIGH
23-SEP-2011 20:14:28.121 G1 0 L33VG11 SOE Gas Fuel Vent Valve Limit Switch
23-SEP-2011 20:14:42.567 G1 1 Q 0521 ALM GAS FUEL MASS FLOW OUT OF RANGE
23-SEP-2011 20:14:57.967 G1 1 L3GRV EVT Gas Fuel Speed Ratio Valve Command Enable
23-SEP-2011 20:14:58.631 G1 0 L52VL2 SOE Heat Vent Gas/DLN Compt Fan Motor#2 Running
23-SEP-2011 20:14:58.681 G1 1 L52VL1 SOE Heat Vent Gas/DLN Compt Fan Motor#1 Running
23-SEP-2011 20:14:59.367 G1 0 Q 0521 ALM GAS FUEL MASS FLOW OUT OF RANGE
23-SEP-2011 20:15:00.354 G1 0 L33VL1 SOE Heat Vent Gas/DLN Compt#1 Pos Switch Close
23-SEP-2011 20:15:03.967 G1 0 L3GRV EVT Gas Fuel Speed Ratio Valve Command Enable
23-SEP-2011 20:15:04.128 G1 1 Q 0521 ALM GAS FUEL MASS FLOW OUT OF RANGE
23-SEP-2011 20:15:06.231 G1 0 L52BT2 SOE Heat Vent Turb Compt Fan Motor#2 Running
23-SEP-2011 20:15:06.291 G1 1 L52BT1 SOE Heat Vent Turb Compt Fan Motor#1 Running
23-SEP-2011 20:15:06.333 G1 0 L86BT1X SOE Turb comp vent fan #2 undercurrent
23-SEP-2011 20:15:08.477 G1 0 L33BT1 SOE Heat Vent Turb Compt#1 Pos Switch Close
23-SEP-2011 20:15:09.301 G1 1 L33VL2 SOE Heat Vent Gas/DLN Compt#2 Pos Switch Close
23-SEP-2011 20:15:14.234 G1 1 L33VG11 SOE Gas Fuel Vent Valve Limit Switch
23-SEP-2011 20:15:15.931 G1 1 L33BT2 SOE Heat Vent Turb Compt#2 Pos Switch Close
23-SEP-2011 20:15:47.007 G1 1 Q 0241 ALM START UP GAS LEAK TEST COMPLETE</pre>
This is where the air purging/venting sequence is completed, and the ignition permissive goes high. the ignition exciter is turned on the SRV and GCV opens and the firing takes place, subsequently followed by the flame detection.<pre>
23-SEP-2011 20:22:35.412 G1 1 L2TV EVT Turbine Vent Timer
23-SEP-2011 20:24:12.813 G1 1 L2TVX EVT Ignition Permissive
23-SEP-2011 20:24:12.836 G1 1 L30SG1 SOE Ignition Exciter On - Channel Fault
23-SEP-2011 20:24:12.853 G1 1 L3GCV1E EVT GCV1 Valve Output Enable
23-SEP-2011 20:24:12.853 G1 1 L3GCV2E EVT GCV2 Valve Output Enable
23-SEP-2011 20:24:12.853 G1 1 L3GRV EVT Gas Fuel Speed Ratio Valve Command Enable
23-SEP-2011 20:24:14.933 G1 0 Q 0241 ALM START UP GAS LEAK TEST COMPLETE
23-SEP-2011 20:24:14.933 G1 1 L28FD EVT Flame Detected
23-SEP-2011 20:24:14.933 G1 1 L28FDC EVT Flame Detector Channel #3
23-SEP-2011 20:24:14.933 G1 1 L28FDD EVT Flame Detector Channel #4
23-SEP-2011 20:24:14.973 G1 1 L28FDB EVT Flame Detector Channel #2
23-SEP-2011 20:24:14.973 G1 1 L30FT_M3 EVT Fired Time PM1 and PM2 (Mode 3)
23-SEP-2011 20:24:15.053 G1 1 L28FDA EVT Flame Detector Channel #1
23-SEP-2011 20:24:15.083 G1 0 L33VG11 SOE Gas Fuel Vent Valve Limit Switch
23-SEP-2011 20:24:22.853 G1 0 L2TVX EVT Ignition Permissive
23-SEP-2011 20:24:23.150 G1 0 L30SG1 SOE Ignition Exciter On - Channel Fault</pre>
turbine enters the warmup phase , and then reaches the accelerating speed. <pre>
23-SEP-2011 20:24:34.932 G1 1 L2W EVT Turbine Warmup Timer
23-SEP-2011 20:24:42.133 G1 1 L30FT_M2 EVT Fired Time PM2 Only (Mode 2)
23-SEP-2011 20:24:42.133 G1 0 L30FT_M3 EVT Fired Time PM1 and PM2 (Mode 3)
23-SEP-2011 20:26:10.374 G1 0 Q 0521 ALM GAS FUEL MASS FLOW OUT OF RANGE
23-SEP-2011 20:27:21.734 G1 1 L14HA EVT HP accelerating speed signal</pre>
Here the l14HS is mostly the min HP operating speed of the machine , kept at 95% . thus at this point the machine has reached 95% speed and L3=1 signifies that the turbine startup sequence is complete.<pre>
23-SEP-2011 20:30:07.925 G1 0 L52CSF1 SOE CSF Breaker closed
23-SEP-2011 20:30:07.976 G1 1 Q 0326 ALM CSF BREAKER CLOSURE TROUBLE
23-SEP-2011 20:30:08.015 G1 1 L14HC EVT Auxiliary cranking speed relay
23-SEP-2011 20:30:09.879 G1 0 L52Q91 SOE Isolation position breaker
23-SEP-2011 20:30:32.817 G1 1 L14HP EVT Spare speed signal
23-SEP-2011 20:30:42.616 G1 1 L14HF EVT Field flashing speed relay
23-SEP-2011 20:30:42.616 G1 1 L14HS EVT HP operating speed signal
23-SEP-2011 20:30:42.672 G1 1 L52TK2 SOE Exhaust Frame Cooling Fan #1 Running
23-SEP-2011 20:30:45.136 G1 0 L30FT_M2 EVT Fired Time PM2 Only (Mode 2)
23-SEP-2011 20:30:45.136 G1 1 L30FT_M3 EVT Fired Time PM1 and PM2 (Mode 3)
23-SEP-2011 20:30:47.728 G1 0 L63TK2L SOE Exhaust Frame Cooling Fan #1 - Low Diff Pressure
23-SEP-2011 20:30:49.775 G1 1 L3 EVT Turbine complete sequence</pre>
I am taking a guess here, and this also answers CSA's VTUR diagnostic alarm. This most probably would have happened when switching on the "synchroniser" selection. The VTUR has the PT signals from the bus and the machine, when the synchronise selection (manual or auto) is selected on the PT signal from the Bus is driven via a aux relay to the mark VI panel. this can also happen during switching off off of the synchroniser and also during the sync time depending on how the diagnostic alarm is configured. The generator is synchronised at 20:32:59.730 as the l52Lx1 is showing 1.
Note * - An interesting thing here is that the compressor bleed off valve which i have seen closes at 95% speed is closing after the breaker close.
After the sync the unit is put in preselect load. <pre>
23-SEP-2011 20:32:31.897 G1 1 L30FT_M1 EVT Fired Time PM1 Only (Mode 1)
23-SEP-2011 20:32:31.897 G1 0 L30FT_M3 EVT Fired Time PM1 and PM2 (Mode 3)
23-SEP-2011 20:32:41.497 G1 1 Q 0604 ALM <S> SLOT 10 VTUR DIAGNOSTIC ALARM
23-SEP-2011 20:32:59.730 G1 1 L52LX1 SOE line circuit breaker position 1
23-SEP-2011 20:32:59.777 G1 1 L52GX EVT Generator Breaker Close/Open Status Input
23-SEP-2011 20:32:59.817 G1 1 Q 0152 ALM GT OUT OF EMISSIONS COMPLIANT MODE
23-SEP-2011 20:33:00.310 G1 0 L33CB1O SOE COMPRESSOR BLEED VALVE #1 OPEN
23-SEP-2011 20:33:00.682 G1 0 L33CB3O SOE COMPRESSOR BLEED VALVE #1 OPEN
23-SEP-2011 20:33:02.257 G1 0 L33CB2O SOE COMPRESSOR BLEED VALVE #2 OPEN
23-SEP-2011 20:33:02.594 G1 0 L33CB4O SOE COMPRESSOR BLEED VALVE #2 OPEN
23-SEP-2011 20:33:09.577 G1 1 L83PS EVT Preselected Load Command
23-SEP-2011 20:33:29.817 G1 0 L1X EVT Master control - startup permissive</pre>
This is where the trouble starts. the gas fuel low trip oil pressure switch goes high initiating the trip. The turbine tripped here<pre>
"20:39:24.782 G1 0 L4 EVT Master protective signal"</pre>as this is the place where the L4 goes to zero.<pre>
23-SEP-2011 20:33:59.138 G1 1 L3GCV3E EVT GCV3 Valve Output Enable
23-SEP-2011 20:33:59.138 G1 1 L3GCVQE EVT Quaternary Valve Output Enable
23-SEP-2011 20:34:00.218 G1 0 L30FT_M1 EVT Fired Time PM1 Only (Mode 1)
23-SEP-2011 20:34:00.218 G1 1 L30FT_M3 EVT Fired Time PM1 and PM2 (Mode 3)
23-SEP-2011 20:39:24.730 G1 1 L63HG2L SOE Gas Fuel System Hyd Press Switch 2 - Trip Signal
23-SEP-2011 20:39:24.730 G1 1 L63HG3L SOE Gas Fuel System Hyd Press Switch 3 - Alarm Signal
23-SEP-2011 20:39:24.756 G1 1 L63HG1L SOE Gas Fuel System Hyd Press Swicth 1- Trip Signal
23-SEP-2011 20:39:24.782 G1 1 Q 0378 ALM GAS FUEL HYDRAULIC TRIP PRESS LOW
23-SEP-2011 20:39:24.782 G1 0 L4 EVT Master protective signal
23-SEP-2011 20:39:24.782 G1 1 L4T EVT Master Protective Trip
23-SEP-2011 20:39:24.823 G1 0 L20FGX EVT Gas Fuel Stop Valve Command
23-SEP-2011 20:39:24.823 G1 0 L2TV EVT Turbine Vent Timer
23-SEP-2011 20:39:24.823 G1 0 L3 EVT Turbine complete sequence
23-SEP-2011 20:39:24.823 G1 0 L3GRV EVT Gas Fuel Speed Ratio Valve Command Enable
23-SEP-2011 20:39:24.823 G1 0 L4T EVT Master Protective Trip
23-SEP-2011 20:39:24.823 G1 1 L4T1 EVT GT Tripped way1
23-SEP-2011 20:39:24.823 G1 1 L4T2 EVT GT Tripped way2
23-SEP-2011 20:39:24.823 G1 1 L4T3 EVT GT Tripped way3</pre>
It is seen here that the cause of the trip "GAS FUEL HYDRAULIC TRIP PRESS LOW" resets ie at least two of the three switches have been reset. thus the signal which goes high causing the trip resets in 80ms. then of course is the usual alarms which come during the shutdown sequence.<pre>
23-SEP-2011 20:39:24.862 G1 0 Q 0378 ALM GAS FUEL HYDRAULIC TRIP PRESS LOW
23-SEP-2011 20:39:24.862 G1 0 L30FT_M3 EVT Fired Time PM1 and PM2 (Mode 3)
23-SEP-2011 20:39:24.862 G1 0 L3GCV1E EVT GCV1 Valve Output Enable
23-SEP-2011 20:39:24.862 G1 0 L3GCV2E EVT GCV2 Valve Output Enable
23-SEP-2011 20:39:24.862 G1 0 L3GCV3E EVT GCV3 Valve Output Enable
23-SEP-2011 20:39:24.862 G1 0 L3GCVQE EVT Quaternary Valve Output Enable
23-SEP-2011 20:39:24.862 G1 0 L4T1 EVT GT Tripped way1
23-SEP-2011 20:39:24.862 G1 0 L4T2 EVT GT Tripped way2
23-SEP-2011 20:39:24.862 G1 0 L83PS EVT Preselected Load Command
23-SEP-2011 20:39:24.982 G1 0 L28FDC EVT Flame Detector Channel #3
23-SEP-2011 20:39:24.982 G1 0 L28FDD EVT Flame Detector Channel #4
23-SEP-2011 20:39:25.005 G1 0 L52LX1 SOE line circuit breaker position 1
23-SEP-2011 20:39:25.063 G1 1 Q 0335 ALM GENERATOR BREAKER TRIPPED
23-SEP-2011 20:39:25.063 G1 0 L28FD EVT Flame Detected
23-SEP-2011 20:39:25.063 G1 0 L28FDA EVT Flame Detector Channel #1
23-SEP-2011 20:39:25.063 G1 0 L2W EVT Turbine Warmup Timer
23-SEP-2011 20:39:25.063 G1 0 L52GX EVT Generator Breaker Close/Open Status Input
23-SEP-2011 20:39:25.093 G1 1 L33VG11 SOE Gas Fuel Vent Valve Limit Switch
23-SEP-2011 20:39:25.102 G1 0 Q 0152 ALM GT OUT OF EMISSIONS COMPLIANT MODE
23-SEP-2011 20:39:25.102 G1 0 L28FDB EVT Flame Detector Channel #2
23-SEP-2011 20:39:25.223 G1 1 Q 0824 ALM VIB BN LG BRG #3 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:25.263 G1 1 Q 0825 ALM VIB BN LG BRG #4 RADIAL SHAFT DISPLACEMENT ALERT
23-SEP-2011 20:39:25.302 G1 1 Q 0841 ALM VIB BN GT BRG #7 RADIAL SHAFT DISPLACEMENT DANGER
23-SEP-2011 20:39:25.915 G1 1 L33CB3O SOE COMPRESSOR BLEED VALVE #1 OPEN
23-SEP-2011 20:39:25.922 G1 1 L33FS1C SOE Gas Fuel Shut Off Valve Close Position
23-SEP-2011 20:39:25.945 G1 1 L33CB1O SOE COMPRESSOR BLEED VALVE #1 OPEN
23-SEP-2011 20:39:26.062 G1 0 Q 0841 ALM VIB BN GT BRG #7 RADIAL SHAFT DISPLACEMENT DANGER
23-SEP-2011 20:39:26.111 G1 0 L33FS2O SOE Gas Fuel Shut Off Valve Open
23-SEP-2011 20:39:26.726 G1 1 L33CB2O SOE COMPRESSOR BLEED VALVE #2 OPEN
23-SEP-2011 20:39:26.941 G1 1 L33CB4O SOE COMPRESSOR BLEED VALVE #2 OPEN
23-SEP-2011 20:39:27.062 G1 0 Q 0335 ALM GENERATOR BREAKER TRIPPED
23-SEP-2011 20:39:27.189 G1 0 L33PS1C SOE Gas Fuel Vent Valve Close Position
23-SEP-2011 20:39:27.234 G1 1 L33PS2O SOE Gas Fuel Vent Valve Open Position
23-SEP-2011 20:39:27.462 G1 1 Q 0321 ALM 88TK RUNNING BELOW MINIMUM OPERATING SPEED
23-SEP-2011 20:39:27.462 G1 0 L14HF EVT Field flashing speed relay
23-SEP-2011 20:39:27.462 G1 0 L14HS EVT HP operating speed signal
23-SEP-2011 20:39:27.482 G1 0 L52TK2 SOE Exhaust Frame Cooling Fan #1 Running
23-SEP-2011 20:39:27.542 G1 0 Q 0321 ALM 88TK RUNNING BELOW MINIMUM OPERATING SPEED
23-SEP-2011 20:39:29.822 G1 0 L4T3 EVT GT Tripped way3</pre>
Trip analysis
I do not have your PID's so please bear with me if there are any mistakes in the assumptions i am making.
The trip oil pressure is supplied from the Lube oil "pump" header. and i believe that the trip oil setting is 0.56 kg. If there was a problem with the lube oil pump then there would have been an alarm in the lube oil circuit, the AOP would have come etc. It has not so i would rule out the Lube oil pump for now.
But you can check the trend if there was any fall in the MOP discharge pressure during the trip.
This has to be an isolated problem with the trip oil circuit. All three switches pick up at the same instant. Is this a retrofitted machine. In such cases i have seen that during an upgrade from markiV or Mark V which had one trip oil switch , on upgrading to mark VI which "needed" three , the other switches were connected to the same take off. This might also happen if the take offs are very near. Did the machine come after maintenance ?? from the above i have the following recommendations
1. check the trip oil filter DP , it might be deceptively low , run the AOP and "force the dump solenoid" (during machine down time) so that the trip oil pressure gauge in the field shows the trip oil value. if this is low then change the trip oil filters.
2. If possible flush the trip oil header.
3. Clean / flush the trip oil pressure switches take off (choked take off is the biggest culprit after a maintenance)
before starting the machine as i said make sure that there is adequate trip oil pressure available.
this seems like a mechanical problem than a instrumentation problem, but you can also calibrate the switches and make the plant management happy.
happy trouble shooting
ProcessValue,
Frame 6FA machines are relatively new machines. A few shipped with Mark V Speedtronic control systems, but most have shipped with Mark VI or Mark VIe Speedtronic control systems.
Further, most 6FAs don't have Accessory Gear Boxes, and so have dual (redundant) Aux. L.O.- and Aux. Hyd. Pumps. (The originator said the "A" AHOP was off-line because of mechanical problems, which is another reason why it's believed the unit is limping along.)
Frame 6FA machines are relatively new machines. A few shipped with Mark V Speedtronic control systems, but most have shipped with Mark VI or Mark VIe Speedtronic control systems.
Further, most 6FAs don't have Accessory Gear Boxes, and so have dual (redundant) Aux. L.O.- and Aux. Hyd. Pumps. (The originator said the "A" AHOP was off-line because of mechanical problems, which is another reason why it's believed the unit is limping along.)
M
mohamed Ramadan
Dear sir
thank you for your reply.
Y has Diag alarm so we swap the X, y and replace the TREG (connected to 1D5) card. and we tray to run the unit till now in service
the Question is
if VPRO has alarm can produce trip signal
what is the effect of Diag alarm on operation
thank you for your reply.
Y has Diag alarm so we swap the X, y and replace the TREG (connected to 1D5) card. and we tray to run the unit till now in service
the Question is
if VPRO has alarm can produce trip signal
what is the effect of Diag alarm on operation
P
Process Value
Thanks CSA for the valuable info. But i have worked in a machine which had a auxiliary gear unit and in your slang i "ass"umed it was so in this machine. .
.And therein lies the problem. :-*
Your experience is with a limited set of machines which employ Speedtronic Mark VI controls. You could qualify your statement by saying you don't have experience with a certain machine if you don't have experience with that machine.
And with your experience with Mark VI you could offer a lot more help--such as with the original poster's query about Diag. Alarms--yet you haven't responded to this or other similar questions.
Yet you make ass-umptions about machines you don't have experience with.
Makes one go hmmmm......
We can use the experience you have on specific equipment.
Your experience is with a limited set of machines which employ Speedtronic Mark VI controls. You could qualify your statement by saying you don't have experience with a certain machine if you don't have experience with that machine.
And with your experience with Mark VI you could offer a lot more help--such as with the original poster's query about Diag. Alarms--yet you haven't responded to this or other similar questions.
Yet you make ass-umptions about machines you don't have experience with.
Makes one go hmmmm......
We can use the experience you have on specific equipment.
