The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Exibições de texto completo
80
Este artigo apresenta uma explicação abrangente da formação do arco elétrico entre a abertura de contatos em um circuito elétrico condutor de corrente. À medida que os contatos começam a se abrir, uma ponte de metal fundido se forma entre eles. A ruptura desta ponte e a formação inicial do arco elétrico são estudadas tanto no ar atmosférico quanto no vácuo por meio de experimentos para determinar a direção da transferência metálica entre os contatos em função do tempo após a ruptura da ponte metálica fundida. A fotografia de faixas de alta velocidade também é usada para mostrar a ruptura da ponte metálica fundida e a formação inicial do arco elétrico. A análise destes dados mostra que existe uma zona de vapor metálico de alta pressão e alta temperatura entre os contatos após a ruptura da ponte de metal fundido. Sob esta condição, um pseudo-arco se forma onde a corrente é transportada por íons metálicos e ocorre uma transferência líquida alta e anômala de metal para o contato catódico. A pressão nesta região diminui rapidamente e há uma transição para o arco elétrico usual, que ainda opera no vapor metálico. Neste arco, a corrente agora é transportada principalmente por elétrons. Os dados mostram que ainda há uma transferência líquida de metal para o cátodo, mas agora o seu volume é uma função do tempo de arco.
The copyright of the original papers published on this site belongs to IEICE. Unauthorized use of the original or translated papers is prohibited. See IEICE Provisions on Copyright for details.
Copiar
Paul G. SLADE, "Opening Electrical Contacts: The Transition from the Molten Metal Bridge to the Electric Arc" in IEICE TRANSACTIONS on Electronics,
vol. E93-C, no. 9, pp. 1380-1386, September 2010, doi: 10.1587/transele.E93.C.1380.
Abstract: This paper presents a comprehensive explanation of the formation of the electric arc between opening contacts in a current carrying electric circuit. As the contacts begin to open a molten metal bridge forms between them. The rupture of this bridge and the initial formation of the electric arc are studied in both atmospheric air and vacuum using experiments to determine the direction of metal transfer between the contacts as a function of time after the rupture of the molten metal bridge. High speed streak photography is also used to show the rupture of the molten metal bridge and the initial formation of the electric arc. Analysis of these data show that a very high-pressure, high-temperature metal vapor zone exists between the contacts after the rupture of the molten metal bridge. Under this condition a pseudo-arc forms where current is carried by metal ions and an anomalous, high net transfer of metal to the cathodic contact occurs. The pressure in this region decreases rapidly and there is a transition to the usual electric arc, which still operates in the metal vapor. In this arc the current is now mostly carried by electrons. The data shows that there is still a net transfer of metal to the cathode, but now its volume is a function of the arcing time.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E93.C.1380/_p
Copiar
@ARTICLE{e93-c_9_1380,
author={Paul G. SLADE, },
journal={IEICE TRANSACTIONS on Electronics},
title={Opening Electrical Contacts: The Transition from the Molten Metal Bridge to the Electric Arc},
year={2010},
volume={E93-C},
number={9},
pages={1380-1386},
abstract={This paper presents a comprehensive explanation of the formation of the electric arc between opening contacts in a current carrying electric circuit. As the contacts begin to open a molten metal bridge forms between them. The rupture of this bridge and the initial formation of the electric arc are studied in both atmospheric air and vacuum using experiments to determine the direction of metal transfer between the contacts as a function of time after the rupture of the molten metal bridge. High speed streak photography is also used to show the rupture of the molten metal bridge and the initial formation of the electric arc. Analysis of these data show that a very high-pressure, high-temperature metal vapor zone exists between the contacts after the rupture of the molten metal bridge. Under this condition a pseudo-arc forms where current is carried by metal ions and an anomalous, high net transfer of metal to the cathodic contact occurs. The pressure in this region decreases rapidly and there is a transition to the usual electric arc, which still operates in the metal vapor. In this arc the current is now mostly carried by electrons. The data shows that there is still a net transfer of metal to the cathode, but now its volume is a function of the arcing time.},
keywords={},
doi={10.1587/transele.E93.C.1380},
ISSN={1745-1353},
month={September},}
Copiar
TY - JOUR
TI - Opening Electrical Contacts: The Transition from the Molten Metal Bridge to the Electric Arc
T2 - IEICE TRANSACTIONS on Electronics
SP - 1380
EP - 1386
AU - Paul G. SLADE
PY - 2010
DO - 10.1587/transele.E93.C.1380
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E93-C
IS - 9
JA - IEICE TRANSACTIONS on Electronics
Y1 - September 2010
AB - This paper presents a comprehensive explanation of the formation of the electric arc between opening contacts in a current carrying electric circuit. As the contacts begin to open a molten metal bridge forms between them. The rupture of this bridge and the initial formation of the electric arc are studied in both atmospheric air and vacuum using experiments to determine the direction of metal transfer between the contacts as a function of time after the rupture of the molten metal bridge. High speed streak photography is also used to show the rupture of the molten metal bridge and the initial formation of the electric arc. Analysis of these data show that a very high-pressure, high-temperature metal vapor zone exists between the contacts after the rupture of the molten metal bridge. Under this condition a pseudo-arc forms where current is carried by metal ions and an anomalous, high net transfer of metal to the cathodic contact occurs. The pressure in this region decreases rapidly and there is a transition to the usual electric arc, which still operates in the metal vapor. In this arc the current is now mostly carried by electrons. The data shows that there is still a net transfer of metal to the cathode, but now its volume is a function of the arcing time.
ER -