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Miniaturized current transformers for multirange operation of milliammeter ink recorders

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1 Author(s)
Geyger, William A. ; U. S. Naval Ordnance Laboratory, Silver Spring, Md.

Conventional forms of multi-range current transformers with a rated output of 5 or 10 va (volt-amperes) cannot be employed for operation of standard moving-coil milliammeter ink recorders which require about 1.5 mw (milliwatts) for full-scale deflection. Recently developed a-c and d-c types of miniaturized current transformers using cores of thin molybdenum-permalloy tape and special construction (extremely small cross-sectional area of the core and very large number of turns of the secondary winding) make multirange operation of such recorders possible.

Published in:

American Institute of Electrical Engineers, Part I: Communication and Electronics, Transactions of the  (Volume:79 ,  Issue: 6 )

Date of Publication:

Jan. 1961

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