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Which of the above values shows the line voltage for a star connected load

A

B

C

D

Which of the following values would be the approximate value of line voltage for a delta connected load with a phase voltage of 900V

600V

519.6 V

1.56 kV

900V

A three phase delta connected load has a phase voltage of 230V what would be the approximate line voltage

230 V

400 V

133 V

240 V

In a star connected system what is the relationship between the line and phase voltage

V PHASE = V LINE x 1.732

V LINE = V PHASE x √3

V LINE = V PHASE/√3

V LINE = V PHASE

Which of the following values would be the approximate value of phase voltage for a delta connected load with a line voltage of 400V

693.2 V

231.2 V

692.8 V

Which of the above values shows the line current for a delta connected load

Which of the following values would be the approximate value of line current for a delta connected load with a phase current of 75A

34.7 A

60 A

129.90 A

104 A

Which of the following values would be the approximate value of line current for a delta connected load with a phase current of 60A

103.92 A

130 A

60.21 A

Which of the below values shows the phase voltage for a star connected load

Which of the above values shows the phase current for a delta connected load

Why is it important to balance three phase loads as evenly as possible across the three phases

to reduce the neutral current

to improve the power factor

to reduce the voltage

to reduce disconnection times

Which of the following would not require a neutral connection

single phase load

three phase unbalanced loads

three phase balanced loads

T.T system

Which of the following values is the approximate neutral current for a balanced star connected load drawing 12 A per phase

20.78 A

36 A

0 A

12 A

Which of the following values would be the approximate value of line current for a star connected load with a phase current of 110 A

75 A

110 A

43.3 A

Which of the following values would be the approximate value of phase current for a star connected load with a line current of 90 A

155.9 A

90 A

51.96 A

30 A

Which of the above meters shows the line voltage for a star connected load

1

2

3

4

Which of the above meters shows the phase voltage for a star connected load

Which of the above meters shows the phase current for a star connected load

none of the above

What is the approximate value of line current for the delta system shown?

20A

6.7A

11.5A

34.6A

What is the approximate value of phase current for the delta system shown?

Which of the following is the phase voltage for the star system shown

60V

11.55V

34.64V

20V

What is the approximate value of phase voltage for the delta system shown

87V

230V

260V

150V

6.71A

11.54A

What formula would you use to calculate the Line voltage

VLINE = 230 + √3

VLINE = 230/√3

VLINE = 230

VLINE = √3 x 230

Three phase Star connected system provided with a neutral can be used for

The connection of three phase loads

The connection of delta loads

The connection of an earth

The connection of single phase loads

In a star connected system what is the relationship between the line and phase current

I LINE = I PHASE /√3

V = I x R

I LINE = I PHASE x 1.732

I LINE = I PHASE

From the following diagram what number represents the Line Current

From the following diagram if number 1 is 11kV what would the value number 3 be

19kV

6.35kA

6.35kV

11kV

From the diagram below, what does the number 4 represent

Phase Voltage

Phase Current

Line Voltage

Line Current