Analysis of Short-Circuit and Dielectric Recovery Characteristics of Molded Case Circuit Breaker according to External Environment
A molded case circuit breaker (MCCB) is one of the most important factors for safety to protect a load from overcurrent in a power distribution system. MCCB, which is mainly installed in switchboards and distribution boxes, may be affected by external temperatures and magnetic fields, but the above...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/11/21/3575 |
| _version_ | 1797468522432954368 |
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| author | Young-Maan Cho Hyun-Jong Park Ho-Joon Lee Kun-A Lee |
| author_facet | Young-Maan Cho Hyun-Jong Park Ho-Joon Lee Kun-A Lee |
| author_sort | Young-Maan Cho |
| collection | DOAJ |
| description | A molded case circuit breaker (MCCB) is one of the most important factors for safety to protect a load from overcurrent in a power distribution system. MCCB, which is mainly installed in switchboards and distribution boxes, may be affected by external temperatures and magnetic fields, but the above factors are still excluded from product standards and performance evaluation. This paper is the result of experimenting and studying the negative effects of these external temperatures and external magnetic fields on MCCB with short-circuit characteristic and dielectric recovery strength. As a result of temperature, it can be found that both short-circuit characteristic and dielectric recovery strength change linearly in accordance with the external temperature. The ratio of the values of 35 °C to 25 °C and 45 °C to 25 °C show the following results. t<sub>10</sub>, t<sub>21</sub>, and t<sub>32</sub> are 1.58, 1.53, and 1.79, respectively, in short-circuit characteristics and t<sub>i</sub>, t<sub>m</sub>, and t<sub>l</sub> are 1.59, 1.69, and 1.53, respectively, in dielectric recovery strength. Depending on the external magnetic field, the short-circuit characteristics decreased by 8.56% only in the t<sub>21</sub> period. The dielectric recovery strength decreases by 4.92% in the initial section (t<sub>i</sub>) and 14.45% in the later section (t<sub>l</sub>), respectively. It has been confirmed that the external magnetic field interferes with the emission of hot gas. |
| first_indexed | 2024-03-09T19:07:39Z |
| format | Article |
| id | doaj.art-a47bd3b7a5ba4ce59970399657eb5d4e |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-09T19:07:39Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-a47bd3b7a5ba4ce59970399657eb5d4e2023-11-24T04:26:08ZengMDPI AGElectronics2079-92922022-11-011121357510.3390/electronics11213575Analysis of Short-Circuit and Dielectric Recovery Characteristics of Molded Case Circuit Breaker according to External EnvironmentYoung-Maan Cho0Hyun-Jong Park1Ho-Joon Lee2Kun-A Lee3Reliability Assessment Center, Hyundai Electric & Energy System Co., Ltd., 17-10 Mabuk-ro, 240 bean-gil, Giheung-gu, Yongin-si 16891, Gyeonggi-do, KoreaLauncher Technology Development Division, Korea Aerospace Research Institute, Daejeon 34133, KoreaDepartment of Electrical & Control Engineering, Cheongju University, 298 Daeseong-ro, Cheongwon-gu, Cheongju-si 360764, Chungcheongbuk-do, KoreaSchool of Social Safety System Engineering, Research Center for Safety and Health, Hankyoung National University, 327 Chungang-ro, Anseong-si 1704, Gyeonggi-do, KoreaA molded case circuit breaker (MCCB) is one of the most important factors for safety to protect a load from overcurrent in a power distribution system. MCCB, which is mainly installed in switchboards and distribution boxes, may be affected by external temperatures and magnetic fields, but the above factors are still excluded from product standards and performance evaluation. This paper is the result of experimenting and studying the negative effects of these external temperatures and external magnetic fields on MCCB with short-circuit characteristic and dielectric recovery strength. As a result of temperature, it can be found that both short-circuit characteristic and dielectric recovery strength change linearly in accordance with the external temperature. The ratio of the values of 35 °C to 25 °C and 45 °C to 25 °C show the following results. t<sub>10</sub>, t<sub>21</sub>, and t<sub>32</sub> are 1.58, 1.53, and 1.79, respectively, in short-circuit characteristics and t<sub>i</sub>, t<sub>m</sub>, and t<sub>l</sub> are 1.59, 1.69, and 1.53, respectively, in dielectric recovery strength. Depending on the external magnetic field, the short-circuit characteristics decreased by 8.56% only in the t<sub>21</sub> period. The dielectric recovery strength decreases by 4.92% in the initial section (t<sub>i</sub>) and 14.45% in the later section (t<sub>l</sub>), respectively. It has been confirmed that the external magnetic field interferes with the emission of hot gas.https://www.mdpi.com/2079-9292/11/21/3575molded case circuit breakershort-circuit characteristicsdielectric recovery strengthexternal temperaturedisturbing magnetic fields |
| spellingShingle | Young-Maan Cho Hyun-Jong Park Ho-Joon Lee Kun-A Lee Analysis of Short-Circuit and Dielectric Recovery Characteristics of Molded Case Circuit Breaker according to External Environment Electronics molded case circuit breaker short-circuit characteristics dielectric recovery strength external temperature disturbing magnetic fields |
| title | Analysis of Short-Circuit and Dielectric Recovery Characteristics of Molded Case Circuit Breaker according to External Environment |
| title_full | Analysis of Short-Circuit and Dielectric Recovery Characteristics of Molded Case Circuit Breaker according to External Environment |
| title_fullStr | Analysis of Short-Circuit and Dielectric Recovery Characteristics of Molded Case Circuit Breaker according to External Environment |
| title_full_unstemmed | Analysis of Short-Circuit and Dielectric Recovery Characteristics of Molded Case Circuit Breaker according to External Environment |
| title_short | Analysis of Short-Circuit and Dielectric Recovery Characteristics of Molded Case Circuit Breaker according to External Environment |
| title_sort | analysis of short circuit and dielectric recovery characteristics of molded case circuit breaker according to external environment |
| topic | molded case circuit breaker short-circuit characteristics dielectric recovery strength external temperature disturbing magnetic fields |
| url | https://www.mdpi.com/2079-9292/11/21/3575 |
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