Arc Erosion of Polarised Contacts Ag-W by High Current

Piotr BORKOWSKI; Makoto HASEGAWA

doi:10.1587/transele.E93.C.1416

Arc Erosion of Polarised Contacts Ag-W by High Current

Piotr BORKOWSKI, Makoto HASEGAWA

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The paper presents the state of knowledge about thermal-erosion processes in contacts of low-voltage switching devices for power engineering on switching currents under short-circuit conditions. The graphical models of the short arc and the distribution of arc power introduced into contacts are shown. The method for measurements of a contact temperature during an electric discharge has been elaborated. The obtained test results are presented, i.e. changes of a contact temperature as a function of arc parameters such as current, energy, and integral ∫idt. The tests have shown that a "break point" exists on the curve expressing the relationship between a temperature rise and arc parameters in the range of high currents. The location of this point is dependent on a diameter of contacts and a value of current, and is associated with thermal energy delivered to electrodes. It has been observed that for each diameter of contacts there exists such value of an energetic quantity of arc (current, ∫idt, energy), at which diameters of arc roots are the same as a contact diameter. Above this value, the shape of a curve is changed. The obtained results explain and confirm the discontinuity of a curve expressing a contact arc erosion as a function of current, which was observed earlier by the other research workers.

Publication: IEICE TRANSACTIONS on Electronics Vol.E93-C No.9 pp.1416-1423

Publication Date: 2010/09/01

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Online ISSN: 1745-1353

DOI: 10.1587/transele.E93.C.1416

Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices (Selected Papers from IS-EMD2009))

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Piotr BORKOWSKI, Makoto HASEGAWA, "Arc Erosion of Polarised Contacts Ag-W by High Current" in IEICE TRANSACTIONS on Electronics, vol. E93-C, no. 9, pp. 1416-1423, September 2010, doi: 10.1587/transele.E93.C.1416.
Abstract: The paper presents the state of knowledge about thermal-erosion processes in contacts of low-voltage switching devices for power engineering on switching currents under short-circuit conditions. The graphical models of the short arc and the distribution of arc power introduced into contacts are shown. The method for measurements of a contact temperature during an electric discharge has been elaborated. The obtained test results are presented, i.e. changes of a contact temperature as a function of arc parameters such as current, energy, and integral ∫idt. The tests have shown that a "break point" exists on the curve expressing the relationship between a temperature rise and arc parameters in the range of high currents. The location of this point is dependent on a diameter of contacts and a value of current, and is associated with thermal energy delivered to electrodes. It has been observed that for each diameter of contacts there exists such value of an energetic quantity of arc (current, ∫idt, energy), at which diameters of arc roots are the same as a contact diameter. Above this value, the shape of a curve is changed. The obtained results explain and confirm the discontinuity of a curve expressing a contact arc erosion as a function of current, which was observed earlier by the other research workers.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E93.C.1416/_p

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@ARTICLE{e93-c_9_1416,
author={Piotr BORKOWSKI, Makoto HASEGAWA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Arc Erosion of Polarised Contacts Ag-W by High Current},
year={2010},
volume={E93-C},
number={9},
pages={1416-1423},
abstract={The paper presents the state of knowledge about thermal-erosion processes in contacts of low-voltage switching devices for power engineering on switching currents under short-circuit conditions. The graphical models of the short arc and the distribution of arc power introduced into contacts are shown. The method for measurements of a contact temperature during an electric discharge has been elaborated. The obtained test results are presented, i.e. changes of a contact temperature as a function of arc parameters such as current, energy, and integral ∫idt. The tests have shown that a "break point" exists on the curve expressing the relationship between a temperature rise and arc parameters in the range of high currents. The location of this point is dependent on a diameter of contacts and a value of current, and is associated with thermal energy delivered to electrodes. It has been observed that for each diameter of contacts there exists such value of an energetic quantity of arc (current, ∫idt, energy), at which diameters of arc roots are the same as a contact diameter. Above this value, the shape of a curve is changed. The obtained results explain and confirm the discontinuity of a curve expressing a contact arc erosion as a function of current, which was observed earlier by the other research workers.},
keywords={},
doi={10.1587/transele.E93.C.1416},
ISSN={1745-1353},
month={September},}

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TY - JOUR
TI - Arc Erosion of Polarised Contacts Ag-W by High Current
T2 - IEICE TRANSACTIONS on Electronics
SP - 1416
EP - 1423
AU - Piotr BORKOWSKI
AU - Makoto HASEGAWA
PY - 2010
DO - 10.1587/transele.E93.C.1416
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E93-C
IS - 9
JA - IEICE TRANSACTIONS on Electronics
Y1 - September 2010
AB - The paper presents the state of knowledge about thermal-erosion processes in contacts of low-voltage switching devices for power engineering on switching currents under short-circuit conditions. The graphical models of the short arc and the distribution of arc power introduced into contacts are shown. The method for measurements of a contact temperature during an electric discharge has been elaborated. The obtained test results are presented, i.e. changes of a contact temperature as a function of arc parameters such as current, energy, and integral ∫idt. The tests have shown that a "break point" exists on the curve expressing the relationship between a temperature rise and arc parameters in the range of high currents. The location of this point is dependent on a diameter of contacts and a value of current, and is associated with thermal energy delivered to electrodes. It has been observed that for each diameter of contacts there exists such value of an energetic quantity of arc (current, ∫idt, energy), at which diameters of arc roots are the same as a contact diameter. Above this value, the shape of a curve is changed. The obtained results explain and confirm the discontinuity of a curve expressing a contact arc erosion as a function of current, which was observed earlier by the other research workers.
ER -