Question

Three similar resistors are connected in star across 400 V, 3-phase lines. The line current is 5 A. Calculate the value of each resistor.​

Answer 1

Resistor = 138.56 Ohm

Given:

Three similar resistors are connected in star across 400 V, 3-phase lines.

The line current is 5 A.

To find:

The value of each resistor.​

Formula used:

Line voltage in star connection = $\sqrt{3}$ × Phase voltage

Ohms law    V = IR

 Where R = resistor

Explanation:

Given that,

Phase voltage = 400 V

Line voltage in star connection = $\sqrt{3}$ × Phase voltage

Line voltage in star connection = $\sqrt{3}$ × 400

Line voltage in star connection = 692.82 V

 From Ohms law  

      V = IR  

   692.82 = 5 × R

 Resistor = 138.56 Ohm

To learn more....

1)Write relation for power drawn in three phase star connected load​

https://brainly.in/question/8545024

2)A three phase transformer having a line voltage ratio of 400/33000 v is connected in the star-delta. The cts on the 400v side have a ct ratio of 1000/5. What must be the ratio of cts on the 33000 side?

https://brainly.in/question/6681778