LOT 201.39 ESF DGs Flashcards Preview

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Flashcards in LOT 201.39 ESF DGs Deck (15):
1

LOT 201.39 ESF DGs


When will the ESF DGs trip on overspeed?

660 RPM
110%


Shuts off fuel AND isolates intake air (S/D Butterfly Valve)

2

LOT 201.39 ESF DGs


What will trip the ESF DGs while operating in Emergency Mode?

Engine Overspeed
660 RPM (110%)

Generator  Differential

Turbo / Engine Lube Oil - Low [1/2 on 2/2]
Normal Mode [1/2 on 1/2]

Emergency Stop Pushbutton [2/2]
ZLP-102

Emergency Stop Plunger pulled out
CP003

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3

LOT 201.39 ESF DGs


What will auto start the standby lube oil pump?

Auto Start:

≥ 540 RPM AND < 35 psig header pressure


Once started must manually secure pump

Powered: Class 1E 480V MCC

  • Same as standby JW pump

4

LOT 201.39 ESF DGs


What is the minimum level required in each ESF DG fuel oil storage tank?

60,500 gallons
LCO 3.8.1.1 AC Sources - Operating
LCO 3.8.1.2 AC Sources - S/D
LCO 3.8.1.3 AC Sources - S/D


Capacity: 70,000 gallons


Note:
Will last for 7 days (≥ 60,500 gallons)

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5

LOT 201.39 ESF DGs


What ESF DG pumps are engine driven?

Shaft Driven Lube Oil

Shaft Driven Fuel Oil

Shaft Driven Jacket Water

HP Fuel Injection Pumps
Driven off cam shaft

6

LOT 201.39 ESF DGs


What will automatically initiate the ESF DG fire suppression system?

Heat / Smoke in Engine Room

Heat / Smoke in Fuel Oil Storage Tank Room


Does not preclude engine operation


Note:
Can be manually initiated by pulling fire alarm in Engine room or outside the door of Fuel Oil Storage Tank Room.

7

LOT 201.39 ESF DGs


What powers the starting air compressors?

MCCs 1A5, 1B5, 1C5


Non-Class 480V that are powered by Class 1E MCCs.

8

LOT 201.39 ESF DGs


What will auto start / stop the DC Standby Fuel Oil Pump?

Auto Start:
< 540 RPM w/ engine start signal

Auto Stop:
≥ 540 RPM AND > 25 psig header pressure


Power Supply: Non-Class 125VDC 1B

9

LOT 201.39 ESF DGs


How does the turning gear interlock prevent the ESF DG from starting?

Blocks starting air if turning gear not fully disengaged

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10

LOT 201.39 ESF DGs


What pressure in the starting air receivers will make the ESF DGs INOPERABLE?

 < 175 psig in BOTH


5 consecutive starts w/o recharge.

11

LOT 201.39 ESF DGs


What is the rated speed, power, and voltage of the ESF DGs?

600 RPM

5500 kW (Continuous)
108% (83 days)
110% (7 days)

4.16 kV ± 10%


Note:
ESF DGs will restore power to Class 1E buses in 10 secs following a LOOP.

12

LOT 201.39 ESF DGs


What will auto start the standby jacket water pump?

≥ 540 RPM AND < 6 psig header pressure
Blocked for 20 sec on S/U


Once started must manually secure pump

Powered: Class 1E 480V MCC

  • Same as standby LO pump

13

LOT 201.39 ESF DGs


What cools the jacket water and lube oil HXs?

Essential Cooling Water (ECW)


Jacket Water is at a higher pressure than ECW

Also cools the Turbo Charger Exhaust Air Inter Coolers (2 / DG)

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14

LOT 201.39 ESF DGs


What jacket water temperature will make the ESF DGs INOPERABLE?

< 100 ˚F


Lube Oil Temperature of < 100 ˚F will also make the ESF DG INOPERABLE

15

LOT 201.39 ESF DGs


What is the purpose of the reset and release pushbuttons on CP003?

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Reset:
Resets all Normal DG Trips

Release:
Switches DG from Emergency Mode → Normal Mode
Switches from Isoch Mode → Parallel Mode


Must press Reset button, verify master trip circuit reset light illuminated, and then release ESF DG from Emergency Mode. (DG will trip if not done)


Note:

  • If Normal Trip was received in Emergency Mode, DG will stop immediately once Stop pushbutton pressed. (No 5 min C/D)
  • This will occur even if Reset pushbutton pressed.

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