| Title |
A Comparative Analysis Study about NFPA of US and Generator Capacity Calculation Methods of Korea |
| Authors |
Jong-Sun Han ; Rae-Young Kim |
| DOI |
http://doi.org/10.5207/JIEIE.2024.38.2.154 |
| Keywords |
Generator caculation; KDS 31 60 20; NEC; NFPA generator size; NEMA MG-1 |
| Abstract |
In this study, the methods for calculating generator capacity currently applied in Korea and the United States were reviewed, and the differences in the calculation methods were examined. Furthermore, two completed buildings were selected for actual verification through calculation and comparative review. The results showed that there was no significant difference in the methods for calculating generator capacity, but the capacity was calculated to be 10-20% larger depending on the characteristics of the building and the type of load. It was found that the NFPA standards apply more specific and detailed baseline data and various constants (such as the method of applying the full-load current for different motor capacities during startup / operation, startup factor, etc.). However, the KDS 31 60 20 method offers a wide range of choices in selecting baseline data (voltage drop of the generator, startup factor by type of startup, harmonic content rate, etc.), resulting in different applications by designers even for the same motor capacity. This area requires focused improvement and legal revision in the future, along with the need to provide specific values for load characteristics and various factors. |