Breaking performance of a capacitive-graded series design of two 24-kV vacuum circuit breakers

Author

Fugel, Thorsten ; Koenig, Dieter

Author_Institution

High Voltage Lab., Darmstadt Univ. of Technol., Germany

fYear

2002

fDate

2002

Firstpage

360

Lastpage

363

Abstract

This contribution deals with the breaking capability of a series design consisting of two 24-kV vacuum circuit breakers (VCB) with grading capacitors. In previous publications it was shown that the breaking capability of the series arrangement is higher compared to the double of a single tube. In addition to these results it is shown that in some cases grading capacitors can increase the breaking capacity even more. Tests with simultaneous opening of the contacts of both tubes are presented with the application of different grading capacitors as well as the choice of different arcing times. In case of reignition of one of the tubes the current circulating between the two tubes is shown. As a result of the tests the breaking capability of the arrangement depending on the arcing time and the value of the grading capacitors can be classified into three zones: area of reignition of the arrangement, scatter area and area of successful arc quenching.

Keywords

circuit-breaking arcs; power capacitors; switchgear testing; vacuum arcs; vacuum circuit breakers; 24 kV; arcing times; breaking capacity; breaking performance; capacitive-graded series design; circulating current; reignition; scatter area; simultaneous contacts opening; successful arc quenching area; vacuum circuit breakers; Actuators; Capacitors; Circuit breakers; Circuit testing; Electromagnetic measurements; Transient analysis; Vacuum arcs; Vacuum systems; Vacuum technology; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Discharges and Electrical Insulation in Vacuum, 2002. 20th International Symposium on

Print_ISBN

0-7803-7394-4

Type

conf

DOI

10.1109/ISDEIV.2002.1027383

Filename

1027383