Phase to Ground Fault Delta/Star Tx
Phase to Ground Fault Delta/Star Tx
(OP)
Hi All,
At work recently we had a phase to ground fault on one of our 8MVA transformers.
I have two questions:
1. What effect does the phase to ground fault have on the voltages on the primary (delta) side of the transformer and will their be a significant voltage drop?
2. How will this effect the voltages on the secondary star side of the transformer?
Am pretty new to the industry so would be very appreciative of some answers.
Thanks.
At work recently we had a phase to ground fault on one of our 8MVA transformers.
I have two questions:
1. What effect does the phase to ground fault have on the voltages on the primary (delta) side of the transformer and will their be a significant voltage drop?
2. How will this effect the voltages on the secondary star side of the transformer?
Am pretty new to the industry so would be very appreciative of some answers.
Thanks.






RE: Phase to Ground Fault Delta/Star Tx
The secondary line to ground current will reflect to the primary as a phase to phase current. The secondary voltage will depend on the magnitude of the current and the transformer impedance.
Bill
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