Power0020
Electrical
- Jun 11, 2014
- 303
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?