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

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Extra info for 315-1975 (R1993) IEEE Graphic Symbols for Electrical and Electronics Diagrams (Including Reference Designation Letters) Bound with 315A-1986 (R1993) Supplement to IEEE Std 315-1986

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1) may be used to supplement a qualifying symbol. 6B — Antenna rotation can be accomplished by electromechanical or electronic means. 5 Battery The long line is always positive, but polarity may be indicated in addition. 1A — Length of delay may be indicated. Asterisk is not part of symbol. 1B — The two vertical lines indicate input side. 2 3 Writing; recording; head, sound-recorder 3 F The broken line - — - indicates where line connection to a symbol is made and is not part of the symbol. , tachometer generator, microphone, motor, loudspeaker, etc.

If required, the general shape of the main lobes of the antenna polar diagrams may be shown adjacent to the symbol. Notes may be added to show the direction and rate of lobe movement. The stem of the symbol may represent any type of balanced or unbalanced feeder, including a single conductor. 5 Qualifying symbols to indicate polarization Use only if essential to indicate special property of an antenna. 6 Qualifying symbols to indicate direction of radiation Use only if essential to indicate special property of an antenna.

If instantaneous currents enter the windings at the marked points, they will produce aiding fluxes. 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. 1A: The lower symbol is used if it is necessary to conserve space. The arrowhead in the lower symbol shall be filled.

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315-1975 (R1993) IEEE Graphic Symbols for Electrical and Electronics Diagrams (Including Reference Designation Letters) Bound with 315A-1986 (R1993) Supplement to IEEE Std 315-1986


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