Denis Dufournet - IEEE Xplore Author Profile

Showing 1-15 of 15 results

Filter Results

Show

Results

On request of IEC Technical Subcommittee 17A, CIGRE Study Committee A3 “High Voltage Equipment” investigated the requirements for ultra-high voltage ac switchgear, especially for parameters which cannot be extrapolated linearly from the corresponding equipment characteristics with lower-rated voltage, namely 800 kV. For circuit breakers, such aspects are the first pole-to-clear factor, the amplitu...Show More
A revision of IEEE C37.011 was done from 2008 to 2011 to improve the content of the 2005 edition on TRV interpolation for terminal fault, line fault, transformer limited fault and reactor limited fault. Another aim was to introduce class S1 and S2 circuit breakers for rated maximum voltages of less than 100 kV.Show More

Circuit breakers go high voltage

Denis Dufournet

IEEE Power and Energy Magazine
Year: 2009 | Volume: 7, Issue: 1 | Magazine Article |
Cited by: Papers (4)
Over the last 50 years, high-voltage circuit breakers have become more reliable, more efficient, and more compact because the interrupting capability per break has been increased dramatically. These developments have not only produced major savings, but they have also had a massive impact on the layout of substations with respect to space requirements. New types of SF6 interrupting chambers, which...Show More

Circuit breakers go high voltage

Denis Dufournet

Year: 2009 | Volume: 7, Issue: 1 | Magazine Article |
A hybrid circuit breaker consists of a series-connected vacuum- and SF6 interrupter. The vacuum interrupter has the function to withstand very steep-rising transient recovery voltages, whereas the SF6 interrupter is stressed with the peak of it. Full scale tests are described of a 145-kV prototype, which is subjected to short-line faults based on 63 kA. During these tests, current through the brea...Show More
An extensive revision of the IEEE C37.011 "Application Guide for TRV for AC High-Voltage circuit Breakers" has been in process for the last four years. The main aim was to introduce the two- and the four- parameter description of the transient recovery voltage (TRV) as used in IEC Switchgear standards that have been introduced in the revisions of Standards C37.04 and C37.06. These two standards ar...Show More
A hybrid circuit breaker consists of a series connected vacuum- and SF6 interrupter. The vacuum interrupter has the function to withstand very steep rising transient recovery voltages, whereas the SF6 interrupter is stressed with the peak of this voltage. Full scale tests are described of a 145 kV prototype, subjected to short-line faults based on 63 kA. During these tests, current through the bre...Show More
This paper describes the efforts by the IEC and the IEEE Switchgear Committee to harmonize the transient recovery voltage (TRV) of circuit breakers from 1 kV to less than 100 kV. Progresses are advancing fairly fast due to previous studies performed by CIGRE on these TRV and a new goodwill toward harmonization demonstrated by all the people involved around the world.Show More
We have transmitted 1.5 Tbit/s over a deployed line of 4000 km of NZDSF using only C-band EDFAs with 25 GHz spacing and NRZ modulation format. The average performance obtained correspond to a 4.8 dB margin for a system designed with Enhanced 7% redundancy FEC scheme based on concatenated Reed-Solomon code. This experiment demonstrates for the first time the industrial feasibility of a 1.5 Tbit/s r...Show More
The self-blast technique of interruption for SF/sub 6/ High-Voltage circuit breakers has been developed and improved during the last fifteen years. This technique has proved to be very effective and has been widely applied to High-Voltage circuit breakers up to 800 kV. The paper shows the application of this technique to the development of SF/sub 6/ Generator circuit breakers with low energy sprin...Show More
New types of SF/sub 6/ interrupting chambers, which implement innovative interrupting principles, have been developed during the past years, based on the objectives of reducing the operating energy of the circuit breakers and consequently increasing their reliability. This paper describes the rear-exhaust-type "self blast" double-volume thermal chamber, which was designed with the help of new cham...Show More
There has been an increasing development of small generators of electric power. These generators of relatively low power, equal or less than 100 MVA, are protected in an economic way by generator circuit breakers which are located between the generator and the step-up transformer. In 1997 the IEEE Switchgear Committee issued a new edition of its standard C37-013 for generator circuit breakers, whi...Show More
High-voltage circuit-breakers have reached such high short-circuit breaking capabilities that they must be tested in synthetic circuits with separate current and voltage sources. As the main performance to be verified by type tests is the interruption of three-phase faults, it is desirable whenever possible to perform three-phase tests. Three-phase synthetic testing is rather new and not covered b...Show More

Design and Implementation of an SF6 Interrupting Chamber Applied to Low-Range Generator Circuit Breakers Suitable for Interruption of Current Having a Nonzero Passage

D. Dufournet;J. M. Willieme;G. Montillet

IEEE Power Engineering Review
Year: 2002 | Volume: 22, Issue: 8 | Magazine Article |
Cited by: Papers (2)

Design and Implementation of an SF6 Interrupting Chamber Applied to Low-Range Generator Circuit Breakers Suitable for Interruption of Current Having a Nonzero Passage

D. Dufournet;J. M. Willieme;G. Montillet

Year: 2002 | Volume: 22, Issue: 8 | Magazine Article |

Transient Recovery Voltages Requirements for System Source Fault Interrupting by Small Generator Circuit Breakers

D. Dufournet;G. E. Montillet

IEEE Power Engineering Review
Year: 2002 | Volume: 22, Issue: 2 | Magazine Article |

Transient Recovery Voltages Requirements for System Source Fault Interrupting by Small Generator Circuit Breakers

D. Dufournet;G. E. Montillet

Year: 2002 | Volume: 22, Issue: 2 | Magazine Article |