YIGO
Electrical
- Jun 27, 2003
- 27
All,
Breaker TCC and damage curves are plotted for one line diagram section that has a transformer 480V Delta/208V Wye-Grounded, a breaker at the transformer primary and cables.
The plot time axis current is referenced to 208V,and short circuit current for 3 phase fault and phase to ground have been calculated.
In order to show short circuit values in the plot, 3 phase short value is represented as is however for phase to ground short circuit value the representation is made considering it is calculated at 120V.
I want to check if the representation is correct,
Thanks
Yigo
Breaker TCC and damage curves are plotted for one line diagram section that has a transformer 480V Delta/208V Wye-Grounded, a breaker at the transformer primary and cables.
The plot time axis current is referenced to 208V,and short circuit current for 3 phase fault and phase to ground have been calculated.
In order to show short circuit values in the plot, 3 phase short value is represented as is however for phase to ground short circuit value the representation is made considering it is calculated at 120V.
I want to check if the representation is correct,
Thanks
Yigo