Conclusions
The above circuits serve to provide an effective protection of electrical measuring instruments from overloading over a wide current range of 50. 10−6–0.4 A with an instrument overloading not exceeding 5–15%. The range of the measured currents can be extended considerably by using in the protection circuits more powerful semiconductor devices. The circuit with a capacitor has been used for protecting the measuring instrument in the supply source of a type NÉM-300-3 magnetoelectric discharge pump.
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Literature cited
I. M. Semenikhin, Izmeritel'. Tekh., No. 7 (1967).
Yu. V. Zel'dich, Izmeritel'. Tekh., No. 9 (1964).
T. A. Voronchev and V. D. Sobolev, Physical Basis of Electric Vacuum Technology [in Russian], Vysshaya shkola, Moscow (1967).
N. N. Goryunov and Yu. R. Nosov (editors), Semiconductor Diodes. Parameters and Measuring Methods [in Russian], Sov. radio, Moscow (1968).
Additional information
Translated from Izmeritel'naya Tekhnika, No. 7, pp. 70–71, July, 1970.
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Eremin, A.P. Protection of electrical measuring instruments from overloading. Meas Tech 13, 1076–1077 (1970). https://doi.org/10.1007/BF00994570
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DOI: https://doi.org/10.1007/BF00994570