Laboratory investigation into the use of MV current transformers for transient based protection

MA Redfern, SC Terry, FVP Robinson, ZQ Bo

Research output: Contribution to conferencePaperpeer-review

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The practical implementation of transient based
protection and its application to power system protection
schemes depends on the availability of transducers suitable for
providing access to the higher frequency transients produced
by faults and other system disturbances.
This paper presents the results of a laboratory investigation
into the suitability of using MV distribution system current
transformers as transducers for accessing the high frequency
transients used in transient based protection schemes.
The investigation has concentrated on the frequency range of
1 to 100 kHz and examined a variety of current transformers
of different types and ages. These included standard
distribution system CTs, class X CTs and split core CTs. The
ages of these CTs varied from new devices that had recently
been manufactured to units that had been withdrawn from
service after thirty or more years in the field.
In addition to examining the high frequency response of the
current transformers while they were operating with standard
power system frequency signals, the investigation also
examined their high frequency response when their cores
were saturated.
Original languageEnglish
Pages1-5. International Conference on Power Systems Transients. IPST 2013. New Orleans, USA.
Publication statusPublished - 2003
EventISPT2003 -
Duration: 1 Jan 2003 → …


Period1/01/03 → …


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