What to expect on primary of delta-star (grounded) transformer with an L-G fault on secondary?
What to expect on primary of delta-star (grounded) transformer with an L-G fault on secondary?
(OP)
I am a bit confused with the behavior of a delta-star (grounded) transformer with a line-to-ground fault on secondary.
Basically as I understand, fault current affecting faulty wye phase will induce a similar current on corresponding delta limb to sustain magnetic balance of the yoke. The confusion is about the line current in the delta side, would it be affected by the fault? or the induced current will tend to circulate inside the delta since its basically a zero sequence current that has no path outside the delta?
Any clue?
Basically as I understand, fault current affecting faulty wye phase will induce a similar current on corresponding delta limb to sustain magnetic balance of the yoke. The confusion is about the line current in the delta side, would it be affected by the fault? or the induced current will tend to circulate inside the delta since its basically a zero sequence current that has no path outside the delta?
Any clue?






RE: What to expect on primary of delta-star (grounded) transformer with an L-G fault on secondary?
If it is a three phase transformer with a three legged core the phantom delta may add some unexpected results.
Bill
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"Why not the best?"
Jimmy Carter
RE: What to expect on primary of delta-star (grounded) transformer with an L-G fault on secondary?