Zobrazeno 1 - 10
of 71
pro vyhledávání: '"E. Dullni"'
Publikováno v:
IEEE Transactions on Plasma Science. 45:2150-2156
The distribution of chopping currents of a vacuum circuit breaker using CuCr25 contact material was measured in a laboratory circuit consisting of a three-phase 20-kV cable system and a dry-type distribution transformer rated 900 kVA. The cable lengt
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 23:1-7
The resistance of vacuum interrupters can be calculated from the geometry and resistivity of current carrying parts and the additional resistance of the contact points between movable and fixed contacts. Since vacuum interrupter contacts are designed
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 13:65-71
The new IEC 62271-100 requires an extensive proof of the capability of capacitive switching for a breaker under test. For vacuum circuit breakers, dielectric properties are mainly determined by the condition and topology of the contact surfaces, whic
Publikováno v:
IEEE Transactions on Plasma Science. 31:923-928
By using a high-speed charge-coupled device (CCD) video technique, three different axial magnetic field contact systems (i.e., unipolar, bipolar, and quadrupolar systems) are investigated at an arc current of 10 kA. Video recordings were compared to
Publikováno v:
IEEE Transactions on Plasma Science. 31:902-908
The principle of controlling a high-current vacuum arc by radial magnetic fields (RMF) forcing the constricted arc to move has been utilized for long time in the design of vacuum interrupters. Detailed electrical and optical measurements in conjuncti
Autor:
E. Dullni
Publikováno v:
IEEE Transactions on Electrical Insulation. 28:454-460
Concerning HV insulation in vacuum, there is still some uncertainty about the processes leading to breakdown, especially in the case of long time lags and large contact spacing. The present measurements show that mechanical shocks cause breakdown of
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Publikováno v:
XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV..
Three position switches are mostly used in SF6 switchgear. A new three position switch is proposed based on vacuum technology to fully employ the superb dielectric performance of vacuum with regard to a compact design. The proposed "Three Position Sw
Publikováno v:
XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV..
The new IEC 62271-100 requires an extensive proof of the capability of capacitive switching for a breaker under test. For vacuum circuit breakers. dielectric properties are mainly determined by the condition of the contact surfaces, which are modifie
Publikováno v:
20th International Symposium on Discharges and Electrical Insulation in Vacuum.
By using a high speed CCD video technique, three different axial magneticfield contact systems i.e. unipolar, bipolar, and quadrupolar systems are investigated at an arc current of 10 kA effective. A low-current DC vacuum arc is initiated by contact