Experimental Investigation of Improvement in the Dielectric Recovery Characteristics of a Molded Case Circuit Breaker Splitter Plate

  • Kun-A LeeEmail author
  • Kwang-Cheol Ko
Original Article


The dielectric recovery characteristics of a molded case circuit breaker (MCCB) are related to re-ignition after current-zero. This characteristic affects the interruption reliability of an MCCB because the fault current cannot be interrupted if re-ignition occurs despite trip unit operation. Therefore, to prevent electric leakage during re-ignition, an improvement in the dielectric recovery characteristic is required. In this paper, the influence of the dielectric recovery characteristics on the splitter plate after current-zero was investigated, and a structure intended to improve the splitter plate was proposed. Measurement of the dielectric recovery voltage confirmed that the proposed structure offered improvement compared with the existing ones.


Dielectric recovery measurement Molded case circuit breaker (MCCB) Splitter plate 



This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (NRF-2017R1C1B5076968).


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Copyright information

© The Korean Institute of Electrical Engineers 2020

Authors and Affiliations

  1. 1.Department of Electrical EngineeringDongshin UniversityNajuSouth Korea
  2. 2.Department of Electrical EngineeringHanyang UniversitySeoulSouth Korea

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