Perspectives on Research on High Voltage Gas Circuit Breakers

Seeger, Martin

doi:10.1007/s11090-014-9595-4

Cited by 38 publications

(24 citation statements)

References 29 publications

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“…1 Copper and its alloys are widely used in contacts on account of their excellent thermal and electrical conductivity. 2 Copper vapor inevitably enters the arcing chamber due to ablation of the contacts, and it may change the composition and properties of the arc and hot gas in the post-arc period.…”

Section: Introductionmentioning

confidence: 99%

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Prediction of the critical reduced electric field strength for carbon dioxide and its mixtures with copper vapor from Boltzmann analysis for a gas temperature range of 300 K to 4000 K at 0.4 MPa

Guo

Zhao

et al. 2015

Journal of Applied Physics

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The influence of copper vapor mixed in hot CO2 on dielectric breakdown properties of gas mixture at a fixed pressure of 0.4 MPa for a temperature range of 300 K–4000 K is numerically analyzed. First, the equilibrium composition of hot CO2 with different copper fractions is calculated using a method based on mass action law. The next stage is devoted to computing the electron energy distribution functions (EEDF) by solving the two-term Boltzmann equation. The reduced ionization coefficient, the reduced attachment coefficient, and the reduced effective ionization coefficient are then obtained based on the EEDF. Finally, the critical reduced electric field (E/N)cr is obtained. The results indicate that an increasing mole fraction of copper markedly reduces (E/N)cr of the CO2–Cu gas mixtures because of copper's low ionization potential and large ionization cross section. Additionally, the generation of O2 from the thermal dissociation of CO2 contributes to the increase of (E/N)cr of CO2–Cu hot gas mixtures from about 2000 K to 3500 K.

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Section: Introductionmentioning

confidence: 99%

“…3 However, the influence of copper vapor on the interruption capability and dielectric breakdown properties is still not clear. 1 SF 6 has excellent insulation and arc-quenching capabilities. Since the 1960s, it has been widely used in high voltage circuit breakers.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the critical reduced electric field strength for carbon dioxide and its mixtures with copper vapor from Boltzmann analysis for a gas temperature range of 300 K to 4000 K at 0.4 MPa

Guo

Zhao

et al. 2015

Journal of Applied Physics

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“…The PTFE vapor changes the radiative absorption properties, the thermal conductivity and the specific heat of the gas, and therefore, the flux of energy to the wall. Further, as shown in Figure , the presence of PTFE vapor reduces the dielectric strength of the gas mixture . In addition, the pressure in the circuit breaker increases, which affects both the flow in the channel and the dielectric strength.…”

Section: High‐voltage Circuit Breakersmentioning

confidence: 95%

Section: High‐voltage Circuit Breakersmentioning

confidence: 99%

Modeling of Thermal Plasma Processes: The Importance of Two‐Way Plasma‐Surface Interactions

Murphy

Park

2016

Plasma Processes & Polymers

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Most thermal plasma applications involve interactions between the plasma and solid or liquid surfaces. Computational models of thermal plasma applications typically consider the influence of the plasma on the surface, but often neglect the effect of the surface on the plasma. In many cases, however, it is not possible to accurately model the plasma process without taking the two‐way interactions into account. This is demonstrated using examples from arc welding, plasma cutting, plasma‐particle interactions, such as occur in plasma spheroidization, plasma nanoparticle production and plasma spraying, and high‐ and low‐voltage circuit breakers. Vaporization of metal, ceramic and polymer surfaces, transfer of heat and momentum from the plasma to particles and droplets, and changes in the surface shape are all shown to affect the properties of the plasma.

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“…However, SF 6 is found to have extremely high global warming potential (approximately 23900 times that of CO 2 ) [2]. Among the alternative gases of SF 6 , CO 2 and its mixtures are considered as the promising options and there has been some real products filled with pure CO 2 gas [3,4].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Influence of Gas Pressure on CO2 Arc Characteristics in High-Voltage Gas Circuit Breakers

Guo

Zhang

et al. 2017

PPT

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Abstract. CO 2 is identified as a promising alternative gas of SF 6 . The magnetohydrodynamics (MHD) arc model is established for a CO 2 circuit breaker. The influence of gas pressure is studied. The simulations are carried out for 0.5 MPa, 0.7 MPa and 0.9 MPa absolute filling pressure, allowing predictions of pressure and temperature distributions. The arc time constant θ and the power loss coefficient Q is extracted. The thermal interruption capability is estimated to grow with increasing filling pressure.

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Perspectives on Research on High Voltage Gas Circuit Breakers

Cited by 38 publications

References 29 publications

Prediction of the critical reduced electric field strength for carbon dioxide and its mixtures with copper vapor from Boltzmann analysis for a gas temperature range of 300 K to 4000 K at 0.4 MPa

Prediction of the critical reduced electric field strength for carbon dioxide and its mixtures with copper vapor from Boltzmann analysis for a gas temperature range of 300 K to 4000 K at 0.4 MPa

Modeling of Thermal Plasma Processes: The Importance of Two‐Way Plasma‐Surface Interactions

Investigation on the Influence of Gas Pressure on CO2 Arc Characteristics in High-Voltage Gas Circuit Breakers

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