Results 241 to 250 of about 20,648 (304)

Research on series arc fault detection method household loads based on voltage signals. [PDF]

Sci Rep
Li B, Shu J, Cui F.
europepmc   +1 more source

Improved assembly DC circuit breaker based on resonant current injection. [PDF]

PLoS One
Cui P, Li G, Zhang Q, He Q, Chen Z, Yang W.   +5 more
europepmc   +1 more source

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Timings of high voltage circuit-breaker

Electric Power Systems Research, 2008
The reliability of an electrical power system is influenced by the operation of circuit-breaker (CB). A good indicator of circuit-breaker condition is its switching time. Based on it some of the critical circuit-breaker irregularities can be detected and removed before they develop to a failure.
Gerd Balzer
exaly   +2 more sources

High voltage vacuum circuit breakers

IEEE Transactions on Power Apparatus and Systems, 1975
A new line of high voltage vacuum power circuit breakers is being developed for 121 kV and above and will use the new vacuum interrupter module presented in a companion paper3. The first ratings in production will be 242 kV with interrupting capabilities of 40,000 amperes, followed by breakers rated 50,000 amperes; both of these will have continuous ...
R.B. Shores, V.E. Phillips
openaire   +1 more source

Interrupters for high-voltage circuit breakers

Electrical Engineering, 1957
The demand for higher breaker voltages and interrupting ratings created by today's expanding energy requirements presents numerous design and test problems. A new line of high-power tubular multibreak-type interrupters has been developed, features of which include accessibility, simplicity of replacement, and a design that can be verified by part ...
A. W. Hill, R. E. Friedrich
openaire   +1 more source

High-voltage oil circuit breakers

Electrical Engineering, 1950
ONLY a few years ago, 3,500,000 kva was the maximum standard rated interrupting capacity for high-voltage circuit breakers, and the interrupting-time ratings were mostly five and eight cycles. This article describes recent developments in interrupting devices that have made available standard circuit breakers for 5,000,000-kva interrupting capacity and
W. M. Leeds, R. E. Friedrich
openaire   +1 more source

Development of High Voltage Vacuum Circuit Breakers in China

2006 International Symposium on Discharges and Electrical Insulation in Vacuum, 2006
This paper introduces research work on the development of high-voltage (HV) vacuum circuit breakers (VCBs) in China from its starting point in 1989 to 2006. In this period, a 126-kV two-breaks VCB prototype and a 126-kV single-break VCB prototype were developed. A latest 252-kV single-break interrupter prototype is introduced. Five HV VCBs technologies
Zhiyuan Liu, Jimei Wang, Shixin Xiu, Zhongyi Wang, Shun Yuan, Li Jin, Heming Zhou, Ren Yang   +7 more
openaire   +1 more source

Comparison of Synthetic Test Circuits for Ultra-High-Voltage Circuit Breakers

IEEE Power Engineering Review, 1996
Three synthetic test circuits to verify the interrupting performance of UHV circuit breakers (765kV, 63kA, 50Hz) are compared on aspects of equivalence, operation, required capacitive energy and applicability. The comparisons show that, although each circuit has its own merits, the EPIC circuit appears to be very attractive.
B.L. Sheng, L. van der Sluis
openaire   +1 more source

High-Voltage Circuit Breakers

Transactions of the American Institute of Electrical Engineers, 1923
The 150-kv. system operated for some years by the Southern California Edison Company has not made use of automatic operation of circuit breakers. The multiplication of generating stations and connections which accompanied the change to 220-kv. makes desirable the automatic sectionalizing of the line in cases of trouble and, therefore, requires circuit ...
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Circuit breakers go high voltage

IEEE Power and Energy Magazine, 2009
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.
openaire   +1 more source