CO: Control Oil Flashcards Preview

LOIT Systems 2018 > CO: Control Oil > Flashcards

Flashcards in CO: Control Oil Deck (19):
1

Which valves in the Main Turbine System does CO operate?

Control Valves
Stop Valves
Intercept Valves

2

How many pumps does the CO System have? How many are normally running?

2
1 running, 1 in standby

3

What is normal discharge pressure for a CO pump?

1600 psig

4

At what pressure will the standby CO pump start?

1300 psig as long as its not in PULL-TO-LOCK

5

How does a CO pump get an amber Control Room light?

Auto start with the pump originally 'Green Flagged'

6

How do the CO pumps maintain a constant discharge pressure with changing system demand?

They vary their pump stroke on system demand

7

How is cooling and lubrication supplied to the CO pumps?

Via a chain driven aux pump

8

When do the CO pump discharge filters alarm?

100 psid

9

What temperature is the CO reservoir maintained?

> 85F

10

How many inches in the reservoir is 1 barrel?

4"

11

How many accumulators does the CO system have?

4

12

What are the CO accumulators charged with? To what pressure?

N2
1000 psig

13

What is the capacity of the CO system accumulators?

200% for transients

14

How many coolers does the CO system have? What cools them?

2
TC

15

What is the purpose of the Fullers Earth Filters?

They maintain the pH of the oil neutral by absorbing water and acids.

16

What is FCV-27 in the CO System?

Its the key-locked throttle valve that controls flow to the Fullers Earth Filters

17

How is the standby CO pump test performed?

HV-29 manually relieves system pressure on an isolated section of the supply header to start the standby pump. Performed locally.

18

What Main Turbine Trips are associated with the CO System?

1100 psig CO header pressure on a 2/3 logic will trip the turbine.
Alarm and Standby pump start at 1300 psig

19

What Control Room indication do you have for CO?

Header Pressure