- #1
Evil Bunny
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Let's assume a 3 phase wye distribution system with a single leg supplying a typical residential center tapped transformer (like we have in the US)... For simple math, let's say it's a 10:1 transformer with 2400V on the primary and 240V on the secondary.
The center tap on the secondary is tied in with the "return" on the primary and grounded to earth, correct?
If a turn to turn short occurred at a point 1/4 of the way down on the primary (let's say that it shorted between the start of the first winding to a point 1/4 of the way down) we would see only 180V on the secondary and we would see 60V on one side of the center tap and the normal 120V on the other side of the center tap, correct?
If the same type of turn to turn short occurred on the secondary in the same location, we would see the same symptoms, correct?
Assuming all of that is correct, here's my question... If a primary to secondary short occured, at this same location, what would we see on the secondary? Would we see 1800V on the secondary with 1200V on one side of the center tap and 600V on the other side of the center tap? Something tells me it's not quite that simple... We now have the same source current running through two separate windings... What effect does this current running through both windings at the same time have on the output? What role would inductance play in this scenario?
The center tap on the secondary is tied in with the "return" on the primary and grounded to earth, correct?
If a turn to turn short occurred at a point 1/4 of the way down on the primary (let's say that it shorted between the start of the first winding to a point 1/4 of the way down) we would see only 180V on the secondary and we would see 60V on one side of the center tap and the normal 120V on the other side of the center tap, correct?
If the same type of turn to turn short occurred on the secondary in the same location, we would see the same symptoms, correct?
Assuming all of that is correct, here's my question... If a primary to secondary short occured, at this same location, what would we see on the secondary? Would we see 1800V on the secondary with 1200V on one side of the center tap and 600V on the other side of the center tap? Something tells me it's not quite that simple... We now have the same source current running through two separate windings... What effect does this current running through both windings at the same time have on the output? What role would inductance play in this scenario?