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

February 23, 2017 | Electronics | By admin | 0 Comments

Read or Download 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 PDF

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Additional 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

Sample text

A gas-filled device may be indicated by a dot within the envelope symbol. , cathode-ray tube, iconoscope, image orthicon, vidicon, X-ray tube, etc. 2. 2 Split envelope If necessary, envelope may be split. 3 Application: gas-filled envelope The gas-recognition symbol (dot) may be located as convenient. 4 Application: liquid-filled envelope The liquid-recognition symbol may be located as convenient. 11 Shield Shielding Normally used for electric or magnetic shielding. 1A: If essential to show type of shielding add E for electric and M for magnetic shielding.

5 Crossing of paths or conductors not connected The crossing is not necessarily at a 90-degree angle. 2 Application: junction of paths, conductors, or cables. , may be indicated if desired. 4 Splice (if desired) of same size cables. Junction of conductors of same size or different size cables. 2A: The asterisk is not part of the symbol. 8 Assembled conductors; cable Commonly used in communication diagrams. 9A — If necessary for clarity, an outer-conductor connection shall be made to the symbol.

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. 4A: The “n” is not part of the symbol. 5A: In all cases, indicate the type of apparatus by appropriate words or letters in the rectangle.

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