Supply and distribution

Question 1

How many diesel generators are fitted to a generic distribution system?

Question 2

What does EDC stand for?

Answer 2

Electrical Distribution Centre

Question 3

How many EDCs are fitted to a Generic Distribution Centre?

Question 4

What does MCCB stand for?

Question 5

List the 5 main breakers fitted to a Generic Distribution system

Question 6

Explain the uses of the five main breakers fitted to a Generic Distribution Cenrtre

Question 7

list the components of the generic distribution system

Question 8

what is the power book and when was it used?

Question 9

what is the lighting book and when is it used?

Question 10

what is the “reference book” and when is it used?

Question 11

what is the ratio for 440V fuses regarding fuse discrimination

Answer 11

3:1

Question 12

what is the ratio for 115V fuses regarding fuse discrimination?

Answer 12

2:1

Question 13

explain Breaker discrimination

Question 14

What does MCR stand for?

Question 15

What does PCP and SCP stand for?

Answer 15

PCP- primary control

SCP- ships control centre

Question 16

List the meters fitted to a switchboard generator section

Question 17

where are the breaker operating switches found and what are they called?

Question 18

describe the connection of shore supply

Question 19

what are the rules regarding to earthing the ship when connecting shore supply

Question 20

what would happen to a motor if phase rotation is wrong?

Question 21

List 3 types of changeover switches

Answer 21

Automatic change over switch (ACOS)
Remote operated change over switch (ROCOS)
Hand change over switch (HCOS)

Question 22

List 3 kinds of hand change over switches

Answer 22

normal/alternative
normal/emergency
normal/alternative/emergency

Question 23

what are where are the 440V earth testing facilities found?

Question 24

why are there separate 115V testing facilities?