RonShap
Electrical
- Aug 15, 2002
- 230
I'm trying to determine if the inrush of transformers totaling approximately 5MVA of varying size XFMRs would damage or significantly be out of the range of performance of (2) 1875kVA, 0.8PF standby diesel generators.
The transformers are significantly underloaded, but the connected load to the XFMR will have no real effect on the inrush that the gens will see during a open transition with application of full load.
Is it a fair assumption to say that the generators can handle approximately 15-16 times its full load current during transformer inrush, or will the voltage drop significantly to accommodate the 0.1 second inrush load?
I do not have decrement curves for the existing generators, but looking at some "typical" ones, it seems close.
The transformers are significantly underloaded, but the connected load to the XFMR will have no real effect on the inrush that the gens will see during a open transition with application of full load.
Is it a fair assumption to say that the generators can handle approximately 15-16 times its full load current during transformer inrush, or will the voltage drop significantly to accommodate the 0.1 second inrush load?
I do not have decrement curves for the existing generators, but looking at some "typical" ones, it seems close.