NK (Non Class 125V DC) Flashcards
Unit 1 is operating in Mode 1. A loss of NKN-M45 has occurred. How does this loss impact the 13.8 kV Intermediate Buses?
A. Control power for NAN-S05 has been lost until NKN-M45 can be restored.
B. Control power for NAN-S06 must be transferred to its alternate source.
C. Control power for NAN-S05 must be transferred to its alternate source.
D. Control power for NAN-S06 has lost until NKN-M45 can be restored.
Answer: C
125 Vdc distribution panel “G” (NKN-D19) provides control power for …
A. 480 Vac Cooling Tower load centers
B. NBN-S01 and NBN-S02
C. Water Reclamation Facility
D. Main Turbine protection circuitry
Answer: A
The input power to the NK Battery Chargers is:
A. 125 VDC Motor Control Center
B. 480 Volt Load Center
C. 120 VAC Distribution Panel
D. 480 Volt Motor Control Center
Answer: D
The 125 VDC Non-class system battery chargers are designed to?
A. Only supply 1/2 of the normal DC loads while charging the battery.
B. Supply DC loads for both busses for at least 8 hrs.
C. Only supply the inverters for 8 hrs. since they are the most vial load.
D. Supply DC loads and simultaneously charge the respective battery.
Answer: D
The non class batteries will last a design MINIMUM of ________ if the associated battery chargers are lost.
A. 8 hours
B. 2 hours
C. 4 hours
D. 24 hours
Answer: B
Unit operating at 100% full power, normal lineup NKN-M45, non-class 125 VDC bus, is deenergized Reactor and main turbine have subsequently tripped Main generator output breakers have been opened and excitation removed SPTA’s are in progress With no operator action, which one of the following describes the status of the listed electrical buses?
A. PBB-S04 and NAN-S02 are energized by offsite power.
B. PBA-S03 and NAN-S01 are both deenergized.
C. PBA-S03 is energized by offsite power and NAN-S01 is deenergized.
D. PBB-S04 is energized by “B” DG and NAN-S02 is deenergized.
Answer: C
The Non-Class 125 Vdc Swing Battery Charger “EF” can be aligned to…
A. both NKN-M45 and M46 (simultaneously).
B. NKN-M45 only.
C. NKN-M46 only.
D. either NKN-M45 or M46 (but not at the same time).
Answer: D
