Influence of grading capacitors on the breaking capacity of two vacuum interrupters in series

Author

Betz, Thomas ; König, Dieter

Author_Institution

ABB Calor Emag Schaltanlagen AG, Hanau, Germany

Volume

6

Issue

4

fYear

1999

fDate

8/1/1999 12:00:00 AM

Firstpage

405

Lastpage

409

Abstract

Series coupling of two vacuum interrupters (VIs) is used in special applications to double the current breaking capability. Grading capacitors are usually added to guarantee essentially equal voltage distribution in each interrupter and to lower the rate of rise of the transient recovery voltage. Other solutions are designed without the use of grading capacitors due to aspects such as lack of space and the need to reduce cost. The aim of this paper is to show the influence of grading capacitors on the breaking capacity. A comparison of the performance with a nonequal voltage distribution is presented, considering the case of self grading arrangements without any additional grading means. The focus is on the transient behavior of both cases when re-ignitions occur in the vacuum interrupters

Keywords

capacitors; transients; vacuum circuit breakers; vacuum interrupters; breaking capacity; equal voltage distribution; grading capacitors; nonequal voltage distribution; re-ignitions; self grading arrangements; series coupling; transient behavior; transient recovery voltage; vacuum interrupters; Capacitors; Circuit breakers; Circuit testing; Contacts; Costs; Equivalent circuits; Interrupters; Vacuum arcs; Vacuum technology; Voltage;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.788734

Filename

788734