SF/sub 6/ auto-expansion circuit breaker design: numerical and experimental investigations of arc-gas interactions

Scarpa, P.; Dauby, B.; Defise, Jean-Marc; Legros, W.; Barrault, M.; Bernard, G.; Rowe, S.

doi:10.1109/61.108927

Cited by 14 publications

(5 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This approach has been reported by such authors as Lindmayer [5], Jones [6], Jones and Fang [7], Lee [8], and Sharkh [9]. Good agreement has been found with experimental data from circuit breakers [10], [11]. Other studies include, for examples, a comparison by AuweterKurtz [12] of an arc column blown transversely by magnetic fields.…”

Section: Introductionmentioning

confidence: 52%

“…The power flux density is evaluated by comparing the temperature of neighboring control volumes (10) This is considered in an axis-symmetric geometry (11) The new thermal state at new time of each volume at position " " is calculated for a given time step by (12) The new temperature of the control volume is determined by (13) when solid when melting or melted when vaporizing where and are the latent heats of melting and vaporization, respectively.…”

Section: Stage 3: Heat Flow Through the Electrodesmentioning

confidence: 99%

See 1 more Smart Citation

Modeling of energy transport in arcing electrical contacts to determine mass loss

Swingler

McBride

1998

IEEE Trans. Comp., Packag., Manufact. Technol. A

View full text Add to dashboard Cite

This paper presents a model which calculates the amount of erosion of an electrical contact undergoing arcing for a range of contact opening conditions. The model assumes all vaporized material is lost from the contact and that the material lost is related to the energy received by the contact. It is proposed that two processes occur which transport energy to the contact surface from the arc discharge. These have been called the radial transport process and the channeled transport process. Calculations at different ratios of the transport processes are compared to experimental data at 9 A, 64 V DC.The modeling procedure consists of several stages: 1) the arc discharge is divided into three regions which generates energy for dissipation; 2) the energy from each region is dissipated through the arc and delivered to the contact surface by radial/channeling transport processes; 3) heat flow through the contact from the surface is calculated using an explicit numerical finite difference scheme dependant upon energy input, contact dimensions, and material properties. This is then used to determine the temperature gradient of the surface and any phase changes; 4) knowing the condition of the contact surface, and contact separation, the mass loss is calculated assuming all evaporated material is removed from the surface.

show abstract

Section: Introductionmentioning

confidence: 52%

Section: Stage 3: Heat Flow Through the Electrodesmentioning

confidence: 99%

Modeling of energy transport in arcing electrical contacts to determine mass loss

Swingler

McBride

1998

IEEE Trans. Comp., Packag., Manufact. Technol. A

View full text Add to dashboard Cite

show abstract

“…Up to now, a large amount of papers concerning measurements and numerical simulations for circuit-breaker arcs has also been published [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Investigation on plasma-quenching efficiency of various gases using the inductively coupled thermal plasma technique: effect of various gas injection on Ar thermal ICP

Tanaka

Sakuta

2002

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Application of the inductively coupled thermal plasma (ICTP) technique was proposed for investigating plasma-quenching efficiency of various gases including the arc-quenching medium of SF6. The ICTP enables us to study fundamentally the effect of gas injection on thermal plasma without any impurities because it has no electrode. Seven kinds of gases including CO2, SF6 and environmentally benign gases (N2, O2, air, He and H2) were injected into Ar ICTP. Spectroscopic observation was carried out in order to investigate a change in the excited state of Ar atoms due to addition of these gases. Radial distributions of the radiation intensity of Ar spectral lines and the temperature of Ar ICTP were estimated. It was found that 10% CO2 addition causes a remarkable decline of the radiation intensity and temperature at any radial position, similarly to 2% SF6 addition. Two-dimensional local thermal equilibrium modelling for Ar ICTP also revealed that CO2 causes temperature decay more than the other gases of N2, O2, air, He and H2 except SF6.

show abstract

“…Computational fluid-dynamics (CFD) methods based on solving the equations of conservation for the complete geometry, including the compression chamber, the moving and fixed electrodes and the nozzle, are emerging [11][12][13][14][15][16][17]. Some of these methods are performed with commercial 0022-3727/97/233240+13$19.50 c 1997 IOP Publishing Ltd CFD packages whereas others are built on specialized codes.…”

Section: Introductionmentioning

confidence: 99%

“…As mentioned previously, this kind of model was successful for cold-flow analysis, but its extension to the high-current phase needs a reliable and flexible arc model. Most of these CFD methods either require the ad hoc imposition of the heat sources produced by the arc according to geometrical assumptions [11][12][13][14] or rely on quasi-one-dimensional arc models inspired by the boundary-layer-type methods of arc analysis [15][16][17]. These assumptions, even though they are adequate for the study of slender arcs on the axis, must be abandoned for the study of strong arc-flow interaction with possible clogging of the nozzles and back flow into the compression chamber.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of a 2 kA convection-stabilized nitrogen arc using CFD tools

Zhang¹,

Trépanier²,

Camarero³

1997

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

A physical model for the computation of convection-stabilized circuit-breaker arcs is presented. The compressible Euler equations have been used as the basic flow model and have been coupled with a two-dimensional arc model to account for the ohmic heating and radiation transport. The governing equations are discretized following a control-volume method for unstructured triangular grids and the fluxes are evaluated using Roe's approximate Riemann solver. This computational fluid-dynamics model is used for the numerical investigation of an axially blown nitrogen arc in a supersonic nozzle and the results are compared with previous numerical results and experimental data.

show abstract

SF/sub 6/ auto-expansion circuit breaker design: numerical and experimental investigations of arc-gas interactions

Cited by 14 publications

References 4 publications

Modeling of energy transport in arcing electrical contacts to determine mass loss

Modeling of energy transport in arcing electrical contacts to determine mass loss

Investigation on plasma-quenching efficiency of various gases using the inductively coupled thermal plasma technique: effect of various gas injection on Ar thermal ICP

Numerical simulation of a 2 kA convection-stabilized nitrogen arc using CFD tools

Contact Info

Product

Resources

About