4 450V 600V

Question 1

Check diagram in book.

Answer 1

Step by step for each attachment

Question 2

1.

Answer 2

600V generator output is fed onto the 600V
Bud bars in the switchboard.
•Fed through their own supply breakers.

Question 3

2.

Answer 3

600V bus bars in the switchboards are connected together by interconnecting breakers.

Question 4

3.

Answer 4

•600V AC is supplied to a converter regulator:

• one supply by electrical motor air circuit breaker.
• Second supply by MCCB

Question 5

4.

Answer 5

converter regulator converts and regulates the voltage at 750V DC.

Question 6

5.

Answer 6

750V DC is fed to the propulsion motors

Question 7

6.

Answer 7

•Control of propulsion motors and diesel generators is carried out from the supervisors desk in the ships control centre SCC.

Question 8

7.

Answer 8

•The 600V supplied is used exclusively for the electric propulsion system.
•That voltage is even higher on other classes of ship.
•Regardless of ship class, all the ship’s consumable/services use 450V/115V.
•The 450V required for ship’s services is generated by a motor generator:
-forward auxiliary
-Upper auxiliary machinery room.

Question 9

8.

Answer 9

• Electrical power to drive the motor generator is supplied from the 600V bus bar.
• Fed through a motor generator feeder breaker.
• Fed to the motor generator.

Question 10

9.

Answer 10

• Motor generator output is connected to the 450V bus bar.

* Fed through a motor generator a supply breaker.

Question 11

10.

Answer 11

450V bud bar in the switchboards are connected by interconnecting breakers.

Question 12

11.

Answer 12

• 450V supplied to electrical distribution centres.

* Fed by feeder breakers.

Question 13

12.

Answer 13

• When alongside, 450V supplied by shore supply to SS/SA Box.
• Fed by shore supply breakers.