DC Distribution

Question 1

What batteries have to be operable in different modes per tech specs?

Answer 1

Mode 1-3. N, A, B
Mode 4. A, B
Mode 5-6. A or B

Question 2

Why does Cook use an ungrounded DC distribution system?

Answer 2

So if you get one ground the system still is operable.

Question 3

What does the AB and CD battery supply?

Answer 3

TDAB (Turbine Distribution AB).
MDAB (Motor Distribution AB)
MCAB (Motor Control AB).

Question 4

What are the loads on the N train battery?

Answer 4

a. Trip & Throttle Valve.
b. Test valve.
c. FMO-211, 221, 231, 241.
d. Auto start circuitry.
e. Turbine Trip circuitry.
f. Electronic over speed circuit.
g. Emergency leak-off valve.
h. AMSAC – inverter.