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Observation of faults in convertor bridges

Observation of faults in convertor bridges

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© The Institution of Electrical Engineers
Published

A method of simultaneously monitoring the seven valves in a 3-phase Graetz bridge circuit is described. The d.c. smoothing-inductor voltage is observed for this purpose. It is shown that the point of failure on the voltage wave of the malfunctioning valve can be found.

Inspec keywords: rectifiers; fault location

Subjects: Power convertors and power supplies to apparatus

References

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      • A.W. Hull , F.R. Elder . The phase of arcback. J. Appl. Phys. , 171 - 178
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      • K. Roth . Measurements to determine the load capacity of Brown Boveri mercury-arc converters. Brown Boveri Rev. , 637 - 649
    3. 3)
      • H. Klemperer . Contribution to the problem of arcbacks in high voltage discharge devices. J. Appl. Phys. , 326 - 330
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      • C. Adamson , N.G. Hingorani . (1960) , High voltage direct current power transmission.
    5. 5)
      • El V. Zip . Probability of arcbacks of l.v. mercury-rectifier units as a function of the electrical stresses. Arch. Elektrotech. , 245 - 258
    6. 6)
      • E. Kobel . Some tests on the influence of the density of the Hg vapour before the anode, on the voltage drop across the are as well as on the blocking effect of the grids, in the case of mercury arcs. Brown Boveri Rev. , 95 - 96
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