LOT 202.04 Turbine Lube Oil Flashcards
- LOT 202.04 Turbine Lube Oil*
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What will auto start the Bearing Oil Pump?
Lube Oil Pressure - Low 2 (11 psig)
- LOT 202.04 Turbine Lube Oil*
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What are the turning gear start permissives?
Bearing Oil Lift Pressure > 850 psig
Bearing Oil Header Pressure (PT-6217) > 3.7 psig**
Turning Gear Engaged
Turbine at zero speed
- Controlled locally and CP007.
- Turning gear will disengage from shaft at 3 RPM
- Physically located between LP turbine and generator
*Note: Turning Gear (CP007) must be in auto/manual and shaft speed \< 600 RPM for pressure to be felt on PT-6217.*
- LOT 202.04 Turbine Lube Oil*
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What will auto start the Bearing Lift Pump (BLP)?
< 600 RPM
AND
Bearing Oil Header Pressure (PT-6217) > 3.7 psig
Pressure at the Turning Gear
AND
Turning Gear Sw (CP007) in AUTO or Manual
- Supplies Six turbine bearing (3 - 8)
- Lifts rotor 3 mils
- LOT 202.04 Turbine Lube Oil*
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What is the purpose of the bearing oil pump?
Provides Oil For:
Lubricating the bearings
LP Seal Oil Backup**
MOP Suction Pressure
Turning Gear Permissive
BLP Suction Pressure
- > 1620 RPM the MOP can perform these functions and the BOP pump can be secured.
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Note:
Emergency Oil Pump performs the same functions as the bearing oil pump in an emergency.(Does NOT supply LP Seal Oil Backup)
- LOT 202.04 Turbine Lube Oil*
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What is the purpose of the Seal Oil Backup Pump?
Provides Oil For:
HP Seal Oil Backup
- *Mechanical Overspeed Device**
- Latching Turbine*
> 1620 RPM the MOP can perform these functions and the Seal Oil Backup pump can be secured.
- LOT 202.04 Turbine Lube Oil*
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What powers the components in the Turbine Lube Oil System?
MCC 1G6:
SOB
BOP
Vapor Extractors
Immersion Heaters (11/12)
Immersion Heaters (13/14) powered from MCC 1G3
MCC 1G5:
BLP
Turning Gear
- 250 VDC 1A:*
- *EOP**
- DP004 (MCC 1G8):*
- *Turning Gear Controls**
- LOT 202.04 Turbine Lube Oil*
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What will auto start the Emergency oil pump?
Lube Oil Pressure - Low 3 (10 psig)
Loss of power to Bearing Oil Pump
Powered from Non-Class 250VDC 1A.
- LOT 202.04 Turbine Lube Oil*
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How does the mechanical overspeed device work?
- *MOP/SOB provides oil pressure to the top of Interface valve (125 psig)**
- HP Seal Oil B/U Line*
> 111% RPM will reposition plunger and allow LO to drain
Will cause interface valve to open (< 100 psig) and allow EHC to drain
Trips Turbine
- LOT 202.04 Turbine Lube Oil*
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When will the turbine trip on Low Lube Oil Pressure?
6 psig ± 1 [1/2 on 2/2]
PT-6212 OR PT-6212B
AND
PT-6212A OR PT-6212C
- LOT 202.04 Turbine Lube Oil*
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What will auto start the standby vapor extractor?
Lube Oil Vacuum - Low (2” WC)
- Alarms in dog shack.
- If cannot maintain vacuum < 2” WC, then unit must shutdown.
- LOT 202.04 Turbine Lube Oil*
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What cools the Turbine Lube Oil Coolers?
OL-ACW
Keeps oil 110 ˚F - 120 ˚F
- LOT 202.04 Turbine Lube Oil*
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What will auto start the Seal Oil Backup Pump (SOB)?
Lube Oil Pressure - Low (12 psig)
