Title :
Frequency spectra of the arc current due to opening electric contracts in air
Author :
Minegishi, Shigeki ; Echigo, Hiroshi ; Sato, Risaburo
Author_Institution :
Dept. of Electr. Eng., Tohoku Gakuin Univ., Tagajo, Japan
fDate :
11/1/1989 12:00:00 AM
Abstract :
Frequency spectra of the electromagnetic noise due to arc current caused by Ag contacts upon opening in air at atmospheric pressure are described. To take into consideration the fast transients and high-frequency discharge phenomena at the contacts, a distributed constant model consisting of relay contacts and a coaxial distributed constant line is introduced. An experiment carried out under conditions of low circuit current (3.84 A) and low source voltage (48 V) is reported. The results indicate that the frequency spectra of the arc currents depends on the length and terminal conditions of the line connected to the contacts
Keywords :
arcs (electric); electrical contacts; electromagnetic interference; silver; 3.84 A; 48 V; Ag contacts; air; arc current; coaxial distributed constant line; contact opening; distributed constant model; electric contracts; electromagnetic noise; fast transients; frequency spectra; high-frequency discharge; low circuit current; low source voltage; relay contacts; Arc discharges; Capacitors; Circuit noise; Contracts; Electromagnetic interference; Equivalent circuits; Fluctuations; Frequency; Relays; Voltage;
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
