rcw retired EE
Electrical
- Jul 21, 2005
- 907
A co-worker stumped me with an IEC question.
ETAP software provides three methods for calculating short circuit currents. Method A gives approximate results, Method B provides more detailed results and requires more information. Method C appears to calculate the impedances at 20 Hz.
Our client is claiming that we should use Method C instead of B.
Is anyone familiar with Method C? Can someone shed light on the advantages of running a short circuit study calculation at 20 Hz?
Or do I not understand what Method C is since I am ANSI and not IEC?
Thanks,
R C Wilson
ETAP software provides three methods for calculating short circuit currents. Method A gives approximate results, Method B provides more detailed results and requires more information. Method C appears to calculate the impedances at 20 Hz.
Our client is claiming that we should use Method C instead of B.
Is anyone familiar with Method C? Can someone shed light on the advantages of running a short circuit study calculation at 20 Hz?
Or do I not understand what Method C is since I am ANSI and not IEC?
Thanks,
R C Wilson