Measurement Techniques

, Volume 2, Issue 2, pp 130–133 | Cite as

Negative loss angle of a three-terminal capacitor

  • M. A. Bykov
Electrical Measurements


  1. 1.

    Both theoretically and practically it is quite possible to obtain a capacitor with an effective negative loss angle or without a loss angle by means of three actual capacitors with actual losses connected according to the circuit shown in Fig. 1b, although in practice such conditions arise only in very rare special cases.

  2. 2.

    When a three-terminal loss-free capacitor is designed it is necessary to adhere to the following rules.


All the details of a three-terminal capacitor which are made of a solid dielectric should be placed in spaces where they are affected by only two pairs of electrodes: “the first measuring electrode and the screen” or “the second measuring electrode and the screen” with a complete absence of the effect of a third electrode (the second measuring electrode in the first instance and the first measuring electrode in the second instance). The presence of a solid dielectric in the field between the first and second measuring electrodes is also, obviously, not permissible.


Physical Chemistry Analytical Chemistry Actual Loss Measuring Electrode Loss Angle 
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Literature cited

  1. [1]
    M. A. Bykov, “Loss-free air capacitors and an experience of their application” Proceedings of the MGIMIP issue 2, [in Russian] (Mashgiz, M., 1950).Google Scholar

Copyright information

© Instrument Society of America 1960

Authors and Affiliations

  • M. A. Bykov

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