Influence of interrupted current amplitude on the residual current and gap recovery after current zero

Author

Huber, E. ; Fröhlich, K.

Author_Institution

Swiss Federal Inst. of Technol., Zurich, Switzerland

Volume

2

fYear

1998

fDate

17-21 Aug 1998

Firstpage

476

Abstract

For commercial vacuum circuit interrupter valves with radial field contact the postarc current (PAC) waveshape was measured after short circuit current interruption applying a transient recovery voltage (TRV) of about 15 kV/μs (RRRV). Keeping the current decline di/dt at current zero constant, the power frequency (PF) current amplitude I_PF was varied from 0.5 up to 2 times the rated short circuit current. Significant influence of I_PF on the gaps memory is shown in particular effecting the post arc current duration which varies in a range between 2 and 8 μs. Based on the existing physical models an interpretation of the results is given. It is shown that the memory effect influences the gap recovery time

Keywords

circuit-breaking arcs; short-circuit currents; transients; vacuum interrupters; 2 to 8 mus; current zero; gap recovery; gap recovery time; gaps memory; interrupted current amplitude; memory effect; post arc current duration; postarc current waveshape; power frequency current amplitude; radial field contact; rated short circuit current; residual current; short circuit current interruption; transient recovery voltage; vacuum circuit interrupter valves; Circuit testing; Current measurement; Frequency; Interrupters; Short circuit currents; Space charge; System testing; Time measurement; Transient analysis; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Discharges and Electrical Insulation in Vacuum, 1998. Proceedings ISDEIV. XVIIIth International Symposium on

Conference_Location

Eindhoven

ISSN

1093-2941

Print_ISBN

0-7803-3953-3

Type

conf

DOI

10.1109/DEIV.1998.738636

Filename

738636