Vacuum arc under an axial magnetic field and its interrupting ability

Yanabu, S.; Souma, Satofumi; Tamagawa, Toru; Yamashita, Shota; Tsutsumi, Toshihiko

doi:10.1049/piee.1979.0079

Cited by 117 publications

(19 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Currentinterruption limit is inversely proportional for current frequencies in the range from 400 to 800 Hz. It is in agreement with the conclusion achieved by other scholars experimentally and theoretically [19], [20]. However, according to the conclusion and the instruction of commercial line-frequency VI (rated operational voltage is 380 V/660 V, rated service short-circuit interrupting limit is 50 kA/40 kA, and mechanical life is 10 000 times), only about 3-kA current can be interrupted at the current frequency of 800 Hz, but the experimental upper limit current is higher than the double of the theoretical value.…”

Section: B Interrupting Ability Of the VI With Amf Contactssupporting

confidence: 93%

Properties of Intermediate-Frequency Vacuum Arc Under Axial Magnetic Field

Wang

Zhu

2009

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

This paper presents an experimental study of the intermediate-frequency (400-800 Hz) vacuum arc under axial magnetic field (AMF). Arc-voltage noise at the first current semiwave is inconspicuous even if the current is not interrupted successfully. This fact is attributed to the application of a sufficiently strong AMF provided by the current flowing through a short vacuum gap. The influence of the current frequency on peak arc voltage and the rate of rise of the arc voltage are investigated. Interrupting ability of a vacuum interrupter (VI) with cup-type AMF contacts made from CuCr50 is examined. It is found that the upper limit of current interruption is inversely proportional for frequencies in the range from 400 to 800 Hz. Phase shift of AMF is studied by the finite-element method based on a simplified symmetric model. The results show that the phase-shift angle increases with the current frequency and influences intermediate-frequency current interruption of VI with AMF contacts. Index Terms-Arc voltage, axial magnetic field (AMF), intermediate-frequency vacuum arc, phase shift of AMF, upper limit of current interruption, vacuum interrupter (VI).

show abstract

Section: B Interrupting Ability Of the VI With Amf Contactssupporting

confidence: 93%

Properties of Intermediate-Frequency Vacuum Arc Under Axial Magnetic Field

Wang

Zhu

2009

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

show abstract

“…Yanabu et al 5) measured the mean axial electric field of the region 10-30 mm away from the cathode with the electrode diameter of 50 mm and the arc current of 10 kA rms. The result was about 1000 V=m, and it is quite close to the mean electric field of our simulation in this region about 800 V=m.…”

Section: Discussionmentioning

confidence: 99%

Variation of plasma parameters of vacuum arc column with gap distance

Wen¹,

Yuan²,

He³

2016

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

On the basis of a two-dimensional (2D) magneto-hydrodynamic model, we studied long-gap-distance vacuum arcs in a uniform axial magnetic field and determined the effect of gap distance varying in a large range on plasma parameters. Simulation results showed that with increasing gap distance, the parameters of the plasma near the cathode are almost invariant, except for ion number density, but the parameters of the plasma in front of the anode clearly vary; meanwhile, joule heat gradually becomes the main source of energy for the arc column. In a short gap, a clear current constriction can be found in the entire arc column. Whereas when the gap distance exceeds a certain value, a sharp contraction of the current only arises in front of the anode.

show abstract

“…Figure 1 shows a 13.8 kV/100 kA class vacuum circuit breaker [15] and Fig. 2 shows a 24 kV/100 kA class hybrid- type switchgear for a generator main circuit [15][16][17][18]. Both circuit breakers can interrupt about 300 kV within three cycles.…”

Section: Requirements Imposed On Backup Breakers By Use Of Sfclmentioning

confidence: 99%

Application study of a high‐temperature superconducting fault current limiter for electric power system

Shimizu

Naito

Yamaguchi

et al. 2006

Electrical Engineering Japan

View full text Add to dashboard Cite

SUMMARYUsing high-temperature superconductors, a superconducting fault current limiter (SFCL) was fabricated and tested. The superconductor and a vacuum interrupter serving as a commutation switch were connected in parallel with a bypass coil. When a fault occurs and excessive current flows, the superconductor is first quenched and the current is transferred to the bypass coil because of the voltage drop of the superconductor. At the same time, since a magnetic field is generated by the current flowing in the bypass coil, the commutation switch is immediately driven by an electromagnetic repulsion plate connected to the driving rod of the vacuum interrupter (VI), and the superconductor is separated from this circuit. Using the test model, we were able to separate the superconductor from the circuit by the movement of the VI within a half current cycle and to transfer all current to the bypass coil. Since the operation of the commutation switch is included in the current limiting operation of this test model, it will be a useful circuit in the development of SFCL in the future. Moreover, since it can make the energy consumption of the superconductor small during the fault state due to the realization of a high-speed switch with simple composition, the burden on the superconductor is reduced compared with the conventional resistive type of SFCL and it is considered that the flexibility of SFCL design is increased. Cooperation with a circuit breaker was also considered; trial calculations of the parameters and energy of operation were conducted and a discussion of the installation of the SFCL in an electric power system is presented.

show abstract

Vacuum arc under an axial magnetic field and its interrupting ability

Cited by 117 publications

References 6 publications

Properties of Intermediate-Frequency Vacuum Arc Under Axial Magnetic Field

Properties of Intermediate-Frequency Vacuum Arc Under Axial Magnetic Field

Variation of plasma parameters of vacuum arc column with gap distance

Application study of a high‐temperature superconducting fault current limiter for electric power system

Contact Info

Product

Resources

About