Circuit Control And Protection

Question 1

A gated toggle switch has to be blank before it can be moved

Answer 1

Lifted

Question 2

What type of fault does the elms deal with?

Answer 2

Minor

Question 3

What type of fault is a falling fault?

Answer 3

Minor

Question 4

If voltage or frequency is decreasing, what type of fault is it?

Answer 4

Minor

Question 5

What do you do if there is a minor fault?

Answer 5

Open the generator control breaker (gcb)

Question 6

What type of fault is a rising fault?

Answer 6

Major

Question 7

What should you do if you get a major fault?

Answer 7

Open the excitation control breaker.

Question 8

What type of fault is it if the voltage in the generator goes from 115 to 120?

Answer 8

Major

Question 9

What is the parameters for volatage?

Answer 9

115 +- 5v

Question 10

What is the parameters for frequency?

Answer 10

400 +-20hz

Question 11

Are the bus tie breakers normally open or closed

Answer 11

Open

Question 12

When would the bus tie breakers close?

Answer 12

When one of the generators is lost.

Question 13

Whats the difference between a split bus and a parallel bus?

Answer 13

SB:generators cannot operate in parallel
PB:2 generators connect to the same bus

Question 14

What must match on a parallel breaker to keep it closed?

Answer 14

Voltage load and frequency

Question 15

What is generator real load used in?

Answer 15

Constant speed drive /

Question 16

What is the generator relative load used in?

Answer 16

Voltage regulator

Question 17

What type of load is the effort required to turn the rotor of the csd?

Answer 17

Generator real load

Question 18

What is a differential fault?

Answer 18

Difference in voltage between the generator and the bus bar.

Question 19

What does fuse rated current mean?

Answer 19

The max current before the fuse blows

Question 20

What percentage of spare fuses must you have on board?

Answer 20

10-20%