What is the B phase voltage when only T1 and T2 are conducting from 60° to 120°. Consider star connected R load.

What is the B phase voltage when only T1 and T2 are conducting from 60° to 120°. Consider star connected R load. Correct Answer –Vs/2

When T1 and T2 are conducting, R phase is connected to the positive bus through the T1 SCR and B phase is connected to the negative bus through the T2 SCR. Considering that the load is a balanced R load. Devices T1 T1 0 T4 T4 0 T1 T1 0 T6 0 T3 T3 0 T6 T6 0 T3 0 T2 T2 0 T5 T5 0 T2 T2 VRN = Vs/2 VBN = -Vs/2.
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