Thanks Waross for a good explanation.
Yes, you are right. As soon as the leftalone transformer comes in parallel with other two, it will adjust the tap automatically (for this, all the transformers has to be in AUTO Mode) and usually within 30 seconds the taps will be equal for all the 3...
Thanks Waross and rasevskii for helpful hints.
Any idea about keeping the transformer in Manual AVR mode (Raise/Lower in Manual) after the successful paralleling of left alone trafo with others. Why not keep it in Auto and let AVR regulates the voltage. This is the request from customer to keep...
Addition:
1. The difference in tap will result in voltage differences, which will affect the synch closing of Bus sections/Couplers.
I understood that we should adjust the synchrocheck settings accordingly in sec/coupler.
2. What should be the transformer voltage regulation mode after...
We are using an automatic closing system in 132/33kV substation, where we have 4 nos. of 132/33kV transformers which runs in 2 groups. T1||T2 and T3||T4.
Scheme is such that if one transformer trips, the left alone transformer from that group get paralleled with the other healthy group of...
