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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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

Sample text

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. When used for other shielding, a note should so indicate.

Elbow), type, impedance, ratings, etc, may be added adjacent to or within any symbol or in a note. 1 Bus bar (with connections shown) Use only if essential to distinguish bus from other circuit paths. 3A: The “n” is not part of the symbol. A number representing the actual number of paths shall be substituted for “n”. 4 Dielectric path other than air Commonly used for coaxial and waveguide transmission. 5 Crossing of paths or conductors not connected The crossing is not necessarily at a 90-degree angle.

Style 2 symbols are drawn with one straight and one curved line. 1, this indicates that either style may be used, as modified for that particular application. 2C — The distance between the plates shall be between one-fifth and one-third of the length of a plate. 1A — For style 1, if it is necessary to identify the capacitor electrodes, the modified element shall represent the outside or lower potential electrode. 1B — For style 2, if it is necessary to identify the capacitor electrodes, the curved element shall represent: a) The outside electrode in fixed paper-dielectric and ceramic-dielectric capacitors; b) The moving element in adjustable and variable capacitors; c) The low-potential element in feed-through capacitors.

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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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