024engineer
Member
What would happen if the H2 bushing was grounded on the primary side of a 3 phase Unground Wye-Delta bank while energized? What is the voltage between ground and the H2 bushing?
Ungrounded supply? In theory, the only effect would be to fix the voltages of the other lines and the neutral to ground. The two lines would be the L-L voltage, and the neutral would be the L-N voltage.What would happen if the H2 bushing was grounded on the primary side of a 3 phase Unground Wye-Delta bank while energized?
If you mean when floating, it approximately equals the L-N voltage, due to capacitance to earth. However, that high impedance means very little current capacity. Enough to shock in most cases.What is the voltage between ground and the H2 bushing?
The first grounding would become the earth reference, but no current would flow. Another grounding becomes a short, and the resultant current depends on the pathway impedance (and source voltage, of course.)So would each leg simply gain a reference to ground and nothing more or would it cause a short circuit to earth?