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Common criteria for right selection of the medium voltage circuit breakers

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3 Author(s)
Trabulus, S. ; Dept. of Electr. Eng., Yildiz Tech. Univ., Istanbul, Turkey ; Gokalp, E. ; Donmezturk, N.

In the mid 1960s, two new breaker technologies, one using SF6 gas and the other Vacuum as its arc quenching medium, were introduced to the switchgear market. Experience in developing SF6 and Vacuum circuits-breakers was supported by increasingly close cooperation between the research centers. Today it can be said that they all replaced the older types of circuit breakers (Bulk-oil, minimum-oil and pneumatic technologies). However, there is not always agreement on which criteria should be used when choosing one of these two dominant technologies. Therefore, both circuit breaker technologies have been discussed taking into consideration those points of Arc interrupting characteristics, basic construction of the switching devices ( magnetic actuator, rapid switching, synchronous circuit-breaker, integration with sensors and electronics), technical performance (electrical and mechanical endurance, reliability of dielectric media, switching overvoltages, environmental impact), specific switching applications (overhead lines and underground cables, transformers, motors, capacitor banks, arc furnaces, shunt reactors).

Published in:

Electrical Insulation Conference and Electrical Manufacturing & Coil Winding Technology Conference, 2003. Proceedings

Date of Conference:

23-25 Sept. 2003