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The Korean Institute of Electrical Engineers (대한전기학회)
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A Study on the Improvement of the Arithmetic for Emergency Generator Capacity

비상발전기용량 산정식 개선에 관한 연구

  • Lee, Jong-Hyuk (Electrical Engineering of Hanyang University) ;
  • Kim, Jin-O (Electrical Engineering of Hanyang University)
  • Received : 2018.09.13
  • Accepted : 2018.10.17
  • Published : 2018.11.01
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Abstract

This paper describes the improvement of the arithmetic for emergency generator capacity. This formula which calculates emergency generator is dependent on the Korean Design Standard of building electrical equipment issued by the Ministry of Land, Infrastructure and Transport, and the technical data related to the generator. when appling the formula, the capacity of the generator is insufficient at the starting conditions of the load facility. In case of emergency, the generator is not operated normally. $PG_2$ of the formula ($PG_1$, $PG_2$, $PG_3$) applied in determining the capacity of the emergency generator is selected by calculating the capacity of the generator based on only biggest one motor among the load equipment and $PG_3$ may not be able to start the generator normally in case of emergency because there is an error such that the power factor is applied at the last start of the motor having the maximum capacity of the load. We analyze the problem of capacity calculation of emergency generators used for general purposes. As a consequence, the improved formulas have been presented for safety of electrical installation.

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References

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