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

Lee, Kun-A; Ko, Kwang Wook

doi:10.1007/s42835-020-00344-6

Cited by 6 publications

(2 citation statements)

References 9 publications

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“…For well-designed low-voltage circuit breakers, the dielectric strength recovery speed should comply with the specified requirements and quickly ensure that the contact gap returns to the insulation state [29,30]. Therefore, the MRPA and CRPA for single-pole and three-pole contacts are not too small.…”

Section: B Reignition Probability Model Based On Aspamentioning

confidence: 99%

Study on the Influence of Reignition on Electrical Life Distribution of Low-Voltage Circuit Breakers

2021

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This study analyzes the recovery voltage changes when a low-voltage circuit breaker opens with load and short-circuit faults and explains the reignition types under different recovery voltages. Reignition probability models of a single-pole contact and three-pole contact under different reignition types are established. The variation law of the contact erosion amount with the arc starting phase angle is analyzed. The distribution characteristics of the electrical life under three reignition types are obtained by simulating the low-voltage circuit breaker electrical life with a random arc starting phase angle. The results show that the electrical life of contacts obviously decreases after reignition, and that the electrical life changes differently with different reignition types. Specifically, the electrical life of a single-pole contact and three-pole contact is reduced by different degrees for the same reignition type. Hence, the influence of reignition on the electrical life distribution characteristics of a low-voltage circuit breaker cannot be ignored. INDEX TERMSElectrical life distribution, low-voltage circuit breaker, recovery voltage, reignition probability model.

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Section: B Reignition Probability Model Based On Aspamentioning

confidence: 99%

Study on the Influence of Reignition on Electrical Life Distribution of Low-Voltage Circuit Breakers

2021

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“…Park [25] reduced the arc generation time by induction needle and magnet, that electric field value is improved up to 20.5% by changing the shape and position of needle. To avoid re-strike inside the switch, Lee [26] improved the manifold inside switch and the improvement of new structure was verified by dielectric recovery voltage. To some extent, optimization on the contact structure and arc chamber can effectively reduce possibility of arc re-strike.…”

Section: Introductionmentioning

confidence: 99%

Suppression of Swirl Arc Re-Strike Under Magnetic Blowing for DC High-Power Application

Zhou,

et al. 2023

IEEE Access

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Probability of arc re-strike increases with the increment of break voltage, especially in an arc chamber of DC bridge-type contacts equipped with permanent magnets. Among all types of arc re-strikes, the most dangerous one is that part of the arc re-enters the contact gap, which is defined as swirl re-strike in this paper. In this paper, the arc images and arc voltage waveforms were analyzed, and the typical features of arc re-strike were identified. In addition, the probability of arc swirl re-strike when the supply voltages range from 270 V to 730 V and the magnetic flux densities ranges from 30 mT to 70 mT were revealed. Mechanism of the swirl re-strike is explained and it is due to the randomness of positions of both the arc igniting and the arc-root transferring on stationary contacts, as well as the non-uniformly distributed magnetic field in the arcing region. Finally, measures to prevent arc re-strike were proposed, and their effectiveness on eliminating re-strike were verified at the voltage range of up to 730V and magnetic flux. Occurrence probability of arc re-strike drops from unity to 13% at 730 V.INDEX TERMS Arc swirl re-strike, Re-strike prevention, Arc-root transferring, Magnetic blowing arc chamber

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Study on Arc Root Transfer Phenomenon of Molded Case Circuit Breaker and Its Influence on Arc Extinguishing Ability

Li¹,

Qian²,

Wang³

et al. 2022

Lecture Notes in Electrical Engineering

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

Cited by 6 publications

References 9 publications

Study on the Influence of Reignition on Electrical Life Distribution of Low-Voltage Circuit Breakers

Study on the Influence of Reignition on Electrical Life Distribution of Low-Voltage Circuit Breakers

Suppression of Swirl Arc Re-Strike Under Magnetic Blowing for DC High-Power Application

Study on Arc Root Transfer Phenomenon of Molded Case Circuit Breaker and Its Influence on Arc Extinguishing Ability

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