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Download PDF by IEEE: 315-1975 R1993) IEEE Graphic Symbols for Electrical and

By IEEE

ISBN-10: 1559374209

ISBN-13: 9781559374200

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Read Online or Download 315-1975 R1993) IEEE Graphic Symbols for Electrical and Electronic Diagrams Including Reference Designation Letters) Bound with its Supplement 315-1986 R1993 PDF

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Additional info for 315-1975 R1993) IEEE Graphic Symbols for Electrical and Electronic Diagrams Including Reference Designation Letters) Bound with its Supplement 315-1986 R1993

Sample text

If instantaneous currents enter the windings at the marked points, they will produce aiding fluxes. 1A: The lower symbol is used if it is necessary to conserve space. The arrowhead in the lower symbol shall be filled. 4A: The “n” is not part of the symbol. ” 12 Copyright The Institute of Electrical and Electronics Engineers, Inc. 5A: In all cases, indicate the type of apparatus by appropriate words or letters in the rectangle. 8A: Use only if necessary for clarity. 3 Alternating current, frequency ranges Use only if necessary to distinguish among different frequency bands.

3 Instantaneous polarity markings These polarity marks shall be used only when it is necessary to show the relative polarity of the windings. 3B — The polarity marks shall be placed near one end of each coil or winding symbol. The exact location is immaterial as long as they are unambiguously placed, especially where other windings are drawn nearby. There shall be only one polarity mark per winding, even if the winding is tapped. 2 Application: instantaneous polarity markings with potential transformer shown 11 Copyright © 1975 IEEE All Rights Reserved Copyright The Institute of Electrical and Electronics Engineers, Inc.

9B — If the coaxial structure is not maintained, the tangential line shall be drawn only on the coaxial side. 1 5 General 5 The broken line - — - indicates where line connection to a symbol is made and is not part of the symbol. 43 Copyright © 1975 IEEE All Rights Reserved Copyright The Institute of Electrical and Electronics Engineers, Inc. 1 General Bend of line indicates direction in which other ends of path will be found. 2 Interrupted (on diagram), shown with individual paths at each side of diagrammatic interruption.

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315-1975 R1993) IEEE Graphic Symbols for Electrical and Electronic Diagrams Including Reference Designation Letters) Bound with its Supplement 315-1986 R1993 by IEEE


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