Results of an investigation on the overvoltages due to a vacuum circuit-breaker when switching an HV motor

Author

Colombo, Emanuela ; Costa, G. ; Piccarreta, L.

Author_Institution

ENEL-CREL, Cologno, Italy

Volume

3

Issue

1

fYear

1988

fDate

1/1/1988 12:00:00 AM

Firstpage

205

Lastpage

213

Abstract

The results of a study of overvoltages arising when an HV motor is switched by a vacuum circuit breaker are presented. A laboratory test circuit was devised that would reproduce the actual network conditions in a generating plant, and special measurement and acquisition systems were used to enable the switching-surge amplitude and waveform to be recorded with accuracy. Statistical processing of the data was followed by estimation of the probability of occurrence of overvoltages and by evaluation of the number of the surges impinging on the motor-winding during its operating life. The results are discussed, and a number of conclusions are drawn

Keywords

circuit breakers; electric motors; machine windings; overvoltage; switching; vacuum apparatus; HV motor; acquisition systems; laboratory test circuit; motor-winding; overvoltages; switching; vacuum circuit-breaker; Circuit breakers; Circuit testing; Insulation; Laboratories; Life estimation; Probability; Surges; Switching circuits; System testing; Vacuum systems; Voltage;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.4247

Filename

4247