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11 Cards in this Set
- Front
- Back
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What is 100/200 normal L.O. tank level? |
33 1/2" |
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What is the normal L.O. tank vacuum? |
-2 - -5 |
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What is the normal 300/400 Lube oil tank level? |
17.5 - 19" |
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State your actions if you receive an ac or backup lube oil pump start alarm? |
Ensure oil pressure is ok, have Aux check for damage to the main oil pump / switchgear, write work request. |
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State your actions if you receive a DC lube oil pump running alarm? |
Check Lube oil pressure, if the pressure is ok and the main pump is still running then try to shut the DC down. If the pressure is actually low, the turbine should have tripped, if it didn't trip then initiate the trip to avoid damage. |
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State your actions if you receive a DC seal oil pump running alarm. |
100/200 - check seal oil differential pressure and ensure it is maintained. Check main pump and switchgear. 300/400 - if there is no issue with the lube oil system or differential pressure regulator then this pump should not stay running. If it is needed, the lube oil system will have issues and the turbine will likely be tripped. It is not desirable to keep H2 in the generator without a backup system. Contact ta immediately if this happens. |
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State your actions if you receive a loss of evactor alarm. |
Check Lube oil vacuum, have Aux check the evactor / switchgear. If on 200 have Aux hook up venturi, also on 100/200 the snuffing steam will need to be reset once the vacuum is re-established. |
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At what point would you would you trip a gas turbine due to bearing temperature? |
There are no trips on journal bearing temperature. The operator will need to monitor temperature and should consider tripping the turbine at approximately 230°. Under no circumstances should the temperature be allowed to get over 235°. |
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State the trips associated with thrust on P2 gas turbines. |
The turbines will trip on both thrust position and thrust temperature. |
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Explain the issue with both radial vibration probes on the same bearing becoming inhibited. What actions must be taken? |
If both probes are inhibited, we have no way of knowing what the vibrations are and the turbine no longer has any protection. The vibration can go up and the turbine will not trip like it's supposed to. The RPE or area TA must be immediately notified so that a decision can be made wether to keep running the unit or shut it down. |
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What can be done to bring eccentricity into acceptable range? |
Either allow the turbine to remain on turning gear for 10 hours or follow the steps outlined in the startup procedure to spin the bow out. |
