Overview of Current Research into Low-Voltage Circuit Breakers

Freton, Pierre; Gonzalez, Jean‐Jacques

doi:10.2174/1876534300902010105

Cited by 10 publications

(2 citation statements)

References 45 publications

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“…The authors of [20] describe the distribution characteristic of electrical life for AC contactors. The authors of [21] introduce the arc plasma characteristic and arc movement of the LVCB. The influence of reignition is examined on the LVCB in [22].…”

Section: Introductionmentioning

confidence: 99%

Electrical Life Assessment of the Low-Voltage Circuit Breaker (LVCB) Considering Arc Voltage

Liu

Wang

2022

Energies

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The low-voltage circuit breaker (LVCB) is commonly utilized in the distribution network. An accurate evaluation of its electrical life is related to the safety and reliability of electric energy output. The traditional arc erosion model only considers the effect of current on contact wear while ignoring the impact of operation conditions (supply voltage and power factor) on electrical life. As a result of the arc voltage, the original circuit topology changes, resulting in an early current zero. At 220–660 V AC supply voltages, arc voltage causes the distortion of the breaking current waveform, and the contact erosion amount (CEA) is smaller than that in the ideal case. This work investigates the effect of arc voltage on breaking current, develops an arc erosion model that includes arc voltage, and compares the CEA curves for various supply voltages and power factors. The electrical life of the LVCB is then simulated using the Monte Carlo approach to determine the distribution of electrical life under various operating situations. The results reveal that the LVCB’s electrical life diminishes as the supply voltage increases under the same power factor; it first declines and then increases as the power factor grows under the same supply voltage. For the combination of two parameters (220 V, 0.95) and (660 V, 0.65), the electrical life difference of the LVCB can reach 21.4%. The method solves the low accuracy problem of the LVCB life assessment under different operation conditions. It improves the efficiency of overhaul and maintenance on the LVCB in power distribution systems.

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Section: Introductionmentioning

confidence: 99%

Electrical Life Assessment of the Low-Voltage Circuit Breaker (LVCB) Considering Arc Voltage

Liu

Wang

2022

Energies

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“…Ideally, the arc is extinguished at the first current zero moment; however, the arc can re-ignite beyond this point. During this breaking process, the arc parameters have a great influence on interruption performance of the LVSD (Freton and Gonzalez, 2009).…”

Section: Introductionmentioning

confidence: 99%

Development of switching performance evaluator and arc modelling tool for low-voltage switching devices

Shin

Golosnoy

McBride

2018

COMPEL

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Purpose The purpose of this paper is to investigate a reliable evaluator of arc re-ignition and to develop a numerical tool for accurate prediction of arc behaviour of low-voltage switching devices (LVSDs) prior to empirical laboratory testing of real products. Design/methodology/approach Two types of interruption tests have been carried out in the investigation of re-ignition evaluators. Arc modelling tool coupled with the load circuit has been developed to predict arc characteristics based on conventional magnetohydrodynamics theory, with special attention given to Lorentz force acting on the arc column and surface phenomena on the splitter plate. The model assumptions have been validated by experimental observation of arc motion and current and voltage waveforms. Findings It is found that the exit-voltage across the switching device and the ratio of system to exit-voltage at the current zero point are reliable evaluators for prediction of re-ignition. Where the voltage ratio is positive, instantaneous re-ignition does not occur. Further, the probability of re-ignition is very low if the voltage ratio is in the rage of −1.3 to 0. Originality/value It is observed that the voltage ratio can be considered as a reliable global evaluator of re-ignition, which can be used for various types of LVSD test conditions. In addition, it is shown that arc modelling allows a good prediction of the current and voltage waveforms, arc motion as well as the exit-voltage, which can be used to obtain the evaluator of re-ignition.

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Corrosion, oxidation, erosion and performance of Ag/W-based circuit breaker contacts: A review

Kesim

Sun

et al. 2018

Corrosion Science

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Overview of Current Research into Low-Voltage Circuit Breakers

Cited by 10 publications

References 45 publications

Electrical Life Assessment of the Low-Voltage Circuit Breaker (LVCB) Considering Arc Voltage

Electrical Life Assessment of the Low-Voltage Circuit Breaker (LVCB) Considering Arc Voltage

Development of switching performance evaluator and arc modelling tool for low-voltage switching devices

Corrosion, oxidation, erosion and performance of Ag/W-based circuit breaker contacts: A review

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