Presentation 2009-06-19
An experimental study on influences of contact opening speeds on break arc characteristics of Ag contacts
Asuka SUDO, Makoto HASEGAWA,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) In order to study the influences of contact opening speeds on break arc behaviors, Ag contacts were operated to break inductive DC load currents from 0.1A to 2.0A at 14V with contact opening speeds of 1mm/s, 5mm/s and 10mm/s in a switching mechanism employing a stepping motor. Occurrence rates of break arcs and their average durations were determined at each current level under the respective contact opening speeds. From the results, irrespective of the opening speed values, at the conventional minimum arc current level of 0.4A, the arc occurrence rates were almost 100% and the average arc durations were around 10 to 30μs. This confirmed the author's previous observations in which the conventional minimum arc current level should be considered as the threshold level for arc discharges of certain duration to occur at the rate of almost 100%. The arc occurrence rates below 0.4A were slightly influenced by changes in the contact opening speeds. With respect to arc extinction gaps calculated by multiplying the average arc duration value and the contact opening speed value, it was found that with increasing the contact opening speeds, arc extinction gaps became larger, although they were on the order of several tens μm or less in the tested conditions.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Arc discharge / Arc extinction gap length / Contact opening speed / Minimum arc current / Ag contacts
Paper # EMD2009-20,CPM2009-32,OME2009-27
Date of Issue

Conference Information
Committee EMD
Conference Date 2009/6/12(1days)
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Registration To Electromechanical Devices (EMD)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) An experimental study on influences of contact opening speeds on break arc characteristics of Ag contacts
Sub Title (in English)
Keyword(1) Arc discharge
Keyword(2) Arc extinction gap length
Keyword(3) Contact opening speed
Keyword(4) Minimum arc current
Keyword(5) Ag contacts
1st Author's Name Asuka SUDO
1st Author's Affiliation Chitose Institute of Science and Technology()
2nd Author's Name Makoto HASEGAWA
2nd Author's Affiliation Chitose Institute of Science and Technology
Date 2009-06-19
Paper # EMD2009-20,CPM2009-32,OME2009-27
Volume (vol) vol.109
Number (no) 89
Page pp.pp.-
#Pages 6
Date of Issue