TURBINE LUBE OIL Flashcards
(17 cards)
What is the temperature range maintained for turbine lube oil coolers from SC?
110-120°F.
What is the condition for LO-P-5 (Turning Gear) to auto-start?
≤15# bearing pressure or <190# LO-P-10 discharge pressure.
What triggers LO-P-6 (EBOP) to auto-start?
<170# LO-P-10 discharge pressure if LO-P-5 has no discharge pressure or its breaker is open.
What is the discharge pressure of LO-P-10 (Shaft Driven Pump)?
200-225#.
At what turbine speed does LO-P-11 (Turbine Driven Booster Pump) supply suction pressure?
> 95% turbine speed.
What is the auto-start condition for LO-P-4 (Motor Driven Suction Pump)?
LO-P-10 suction pressure ≤10#.
What is the purification rate of Bowser (LO-L-1)?
Exceeds 10% purification per hour.
What is the start permissive for HP Lift Oil Pumps (LO-P-7A-J)?
> 5# suction pressure.
What are the fire hazard reduction measures for turbine lube oil systems?
Guard pipes near hot components, tank covers for rapid vapor relief, and threaded connections to minimize leaks.
What happens to LO-P-6 on loss of the 1D 4kV bus?
LO-P-6 starts but does not supply turbine bearing oil because it cannot overcome LO-P-11 discharge pressure.
What are the consequences of oil being too cold or too hot?
Oil too cold causes oil whip, and oil too hot leads to viscosity breakdown.
What is required for all HP Lift Oil Pumps (LO-P-7A-J) to operate or bypass?
All pumps must be running or bypassed to place the turbine on the turning gear.
What is the purpose of guard pipes near hot components?
Guard pipes are used to reduce fire hazards by containing pressurized oil near hot components.
How do tank covers help in fire hazard reduction?
Tank covers rapidly relieve oil vapor and hydrogen explosions to minimize fire risks.
What is the effect of oil being too cold?
Oil that is too cold can cause oil whip.
What happens when oil is too hot?
Oil that is too hot can lead to viscosity breakdown.
What happens to LO-P-6 on loss of the 1D 4kV bus?
LO-P-6 starts but does not supply turbine bearing oil because it cannot overcome LO-P-11 discharge pressure.
