Question

Considering two parallel three-phase circuits that are close together, when calculating the equivalent series-impedance and shunt-admittance matrices, mutual inductive and capacitive couplings between the two circuits can be neglected.

(a) True

(b) False

Short answer

Therefore, the correct option is (b) false.

Step-by-step solution

Draw the single-line diagram.

Draw the single-line diagram of double circuit line, connected in parallel.

In the above figure, the voltage across the lines are same , but currents are different.

Determine the correct option.

If two circuits are connected in parallel, there are mutual inductances and mutual capacitances generated.

While calculating equivalent series impedance or shunt-admittance, this mutual inductances and capacitance should not be neglected, unless the spacing between the circuit is large.

Therefore, the correct option is (b) false.