Summary
This transformer with an additional (balancing) winding can be successfully used in measuring bridge circuits with unbalanced null indicators (one of whose terminals is connected to ground) and also when a single feeding transformer is used in circuits with varying ratios of ratio arms.
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Literature cited
A. D. Nesterenko, Foundation of Balanced Electrical Measuring Circuits Design [in Russian] (chapter 13, Acad. Sci. UkSSR Press, Kiev, 1953).
K. M. Sobolevskii and Yu. A. Shakola, Protection of AC Bridges [in Russian] (chapter II, Acad. Sci. UkSSR Press, Kiev, 1957).
M. A. Bykov, Measurement Techniques No. 6 (1956).
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Gurovich, G.Y. A balancing transformer for feeding AC bridge circuits. Meas Tech 2, 272–273 (1959). https://doi.org/10.1007/BF00975507
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DOI: https://doi.org/10.1007/BF00975507