NDLI: Non-conventional current transformers on live tank circuit breakers

Content Provider	IEEE Xplore Digital Library
Author	Roussel, P. Dupraz, J.P. Montillet, G.
Copyright Year	2001
Description	Author affiliation: ALSTOM, Villeurbanne, France (Roussel, P.)
Abstract	Today nonconventional current transformers (NCCTs) have achieved high performances with a very small volume. In addition the digital output complies with the most stringent requirements of protective relays and meters. The designs take into account the harshest environmental conditions of temperature, vibrations and electromagnetic compatibility. A few current transformers of these types are already in service on several networks all over the world as stand alone units. As the energized part of these current transformers are now very small, it is possible to integrate them directly on a live tank circuit breaker (in opposition to a dead tank circuit breaker). By doing this it is possible to limit the number of insulators and the architecture of the substation. On a single chamber live tank circuit breaker, the current transformer can be mounted either on the top of the chamber or between the chamber and column. On a T shaped live tank circuit breaker (2 chambers in series), current transformers are located on the far end of the chamber. This arrangement is electrically equivalent to a dead tank circuit breaker.
Starting Page	306
Ending Page	311
File Size	710423
Page Count	6
File Format	PDF
ISBN	0780366727
DOI	10.1109/PESW.2001.917053
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-01-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Current transformers Circuit breakers Power transformer insulation Consumer electronics Temperature sensors Redundancy Substations Voltage transformers Maintenance Costs
Content Type	Text
Resource Type	Article

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