LOS(L3) - Main Turbine and Generator Lube Oil

Simplified Diagram

Main Oil Tank

Main Oil Pump

Power Supply?

Nominal Pressure?

Shaft Driven near Front Standard

200-260psig Discharge

(Nominal BEARING Pressure: 26psig)

Booster Oil Pump

Power Supply?

When in service?

Individual turbine driven INSIDE Oil Tank

>1,650rpm

Turning Gear Oil Pump (TGOP)

Auto Start?

Capability?

175psig Main Oil Pump discharge (Normal 200-260psig)

OR

16psig Bearing supply (Normal 26psig)

Will NOT prevent a turbine trip on low oil pressure alone

*MANUALLY stopped following start

Motor Suction Oil Pump (MSOP)

Auto Start?

When required?

10psig Main Oil Pump Suction(TGOP based on discharge)

Required when <1,650rpm

*MANUALLY stopped following start

Emergency Oil Pump (EBOP)

Auto Start?

Power Supply?

Runtime?

Loss of power to TGOP or MSOP

OR

16psig Bearing Oil Supply Pressure (Normal 26psig)

OR

165psig Main Oil Pump Discharge AND 10psig TGOP discharge
(Meaning pressure is still lowering below 175psig and TGOP is not working/running")

*Auto-starts are hardwired

EDS5 250VDC

Pump will run for 3hrs before a timer locks out the power supply

Turbine should be idle within 3hrs of trip

Main Oil Coolers

Cooled by TCS

Nominal: 113°F

During Startup: 86°F

(Controlled by adjusting TCS-AOV-025)

Jacking Oil Pumps

A/C/E/G

B/D/F/H

LOS Turbine Trips

Main Oil Pump Discharge

Bearing Oil Supply

Discharge </=106psig

Supply </=10psig