Anode and cathode arc root movement during contact opening at high current

McBride, J.W.; Jeffery, P.A.

doi:10.1109/6144.759351

Cited by 26 publications

(20 citation statements)

References 14 publications

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“…There have been numerous studies of cathode root motion [7]- [10], since the cathode root as the electron source was thought to dominate arc motion, however recent results [1], [19] have demonstrated the importance of anode motion.…”

Section: Review Of Arc Motion Studiesmentioning

confidence: 99%

“…The energy released by the fault is reduced and damage to both the circuit and the circuit breaker is minimized. This paper follows on from previously published papers [1]- [3], [19] where the test system and arc imaging system used here were described in detail. Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Techniques have been developed that allow the trajectory of the two arc roots to be plotted separately from the AIS data, based on the method identified in [1], [19]. The method is used to measure the time period that each arc root remains in the contact region, known as the cathode root contact time and the anode root contact time.…”

Section: A Test Systemmentioning

confidence: 99%

“…The short circuit tests were carried out in a flexible test apparatus (FTA) designed to simulate the current limiting operation of a MCB [1], [19]. Fig.…”

Section: A Test Systemmentioning

confidence: 99%

“…The study of anode motion in high current switching devices has often been neglected at the expense of the apparently more dominant phenomena at the cathode arc root. Recent studies have shown that although the cathode root is important there are cases where the motion of the anode root can dominate arc motion and therefore the performance of low voltage switching devices [1], [19]. The main emphasis of the work presented here is applied to low voltage current limiting devices.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Arc root commutation from moving contacts in low voltage devices

McBridge

Pechrach

Weaver³

2001

IEEE Trans. Comp. Packag. Technol.

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Abstract-This paper focus on the arc commutation from a moving contact and in particular on the anode motion of a high current arc in low voltage current limiting circuit breakers. Recent investigations have observed that the anode arc root motion is affected by arc chamber geometry. It was previously assumed that cathode root motion was the dominant process. The study uses a flexible test apparatus with a solid state high speed imaging system. The experimental results presented show the influence of arc chamber venting, current level, current polarity and contact velocity on arc motion. Particular emphasis is made to the anode motion. The physical process occurring in the anode root are discussed and related to the observed motion. The results show that the anode root is retarded at the tip of the moving contact and that this is primarily related to the venting process in the arc chamber.

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Section: Review Of Arc Motion Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: A Test Systemmentioning

confidence: 99%

“…The short circuit tests were carried out in a flexible test apparatus (FTA) designed to simulate the current limiting operation of a MCB [1], [19]. Fig.…”

Section: A Test Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Arc root commutation from moving contacts in low voltage devices

McBridge

Pechrach

Weaver³

2001

IEEE Trans. Comp. Packag. Technol.

Self Cite

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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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The influence of electrode erosion on the air arc in a low-voltage circuit breaker

Rong

et al. 2009

Journal of Applied Physics

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This paper focuses on the numerical research of the influence of electrode erosion on the arc behavior during opening process of low-voltage circuit breakers. The mathematical model of three-dimensional air arc plasma considering electrode erosion is built based on magnetic hydrodynamics. The mass fraction equation of copper vapor is introduced to the model on the basis of traditional mass, momentum, and energy balance equations. The influence of copper vapor on the thermodynamic and transport properties of the gas mixture is considered in this paper. The distributions of temperature field, gas flow field, and mass fraction of copper vapor in the arc chamber are simulated. The arc root displacements and arc voltage, which takes account of the influence of electrode erosion, are calculated. The simulation results indicate that the immobility time of both moving contact and stationary contact is much longer considering electrodes erosion. The calculated voltage of the arc column during arc motion considering erosion is smaller because of the change in the electrical conductivity of air-copper vapor mixtures. Except for the numerical investigation on the arc motion considering electrode erosion, the experiment work is also carried out to support the simulation work.

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Anode and cathode arc root movement during contact opening at high current

Cited by 26 publications

References 14 publications

Arc root commutation from moving contacts in low voltage devices

Arc root commutation from moving contacts in low voltage devices

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

The influence of electrode erosion on the air arc in a low-voltage circuit breaker

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