Electrical

Question 1

How Many Switchboards are There?

Answer 1

10 Switchboards 1SG. 1SA, 1SB, 2SG, 2SA, 2SP, 2SB, 3SG, 3SA, 3SB.

SG and SA are located in Aux 1, Main 2, and 3 Gen

SB’s are in the GSE Shop, by the Post Office, and by 3MC’s Office

Question 2

How Many Load Centers and How Would you Find Them?

Answer 2

22 Load Centers

First number is forward or aft. It goes from 1-5. If it’s 6, it’s on the ships superstructure

Second number, 1 and 3 are starboard, 2 and 4 are port

Question 3

What are the Generators Rated at?

Answer 3

450 Volts
60Hz
3 Phases
4800 Amps
3000 Kw
0.8 Power Factor

Question 4

What are ZEDS and why are they Important?

Answer 4

Zonal Electrical Distribution System. Lesson learned from the USS Cole. Allows the ship to take a hit on port side and transfer power load to starboard side.

Question 5

What is the Function of the Automatic Load Shed?

Answer 5

Load Shed is designed to prevent overworking the generators.

Stage 1 occurs at 3000 Kw at 100 milli-seconds. Dumps all non-vital equipment.

Stage 2 occurs 5 seconds after stage 1 if the load does not decrease, this stage dumps A/C Units.

Question 6

What Does EPCC Stand For and Where is it Located?

Answer 6

Electrical Plant Control Console. Located by PACC in CCS.

Question 7

Where is 2SP Located?

Answer 7

Main 2, upper level.

Question 8

How Many Shore Power Receptacles are There?

Answer 8

12

Question 9

What is the Rating of the Shore Power Cables?

Answer 9

450 Volts
400 Amps
60 Hz
3 Phase

Question 10

Where are the 400Hz Converters/Switchboards?

Answer 10

Fwd and Aft Power Conversion Rooms.

Question 11

What is the Purpose of MBTs and ABTs?

Answer 11

Manual Bus Transfer and Automatic Bus Transfer allow the transfer of normal to alternate power.

Question 12

What is the purpose of Degaussing?

Answer 12

Reduces the ships influence on earths magnetic field by sending direct current through cables wrapped around the ship. Keeps us magnetically invisible from magnetic seeking mines.

Question 13

How Many Degaussing Coils are There?

Answer 13

4 Coils.
1) A-Coil 2) M-Coil 3) FP-QP Coil 4) FI-QI Coil

FI-QI: Forecastle Induced, Quarterdeck Induced

FP-QP: Forecastle Perm, Quarterdeck Perm

Question 14

Where are the Degaussing Power Supply Units Located?

Answer 14

All 4 are in 2-240-0-Q, on the reefer deck.

Question 15

Where are the Control Panels for Degaussing Located?

Answer 15

Main control is in CCS next to the EPCC

Remote control is on the bridge

Question 16

What is the Path of Electricity from the Generator to a Receptacle?

Answer 16

Generator > SG > SA or SB > Load Center > Lighting Load Center > Lighting Distribution Box > Lighting Distribution Panel > Receptacle