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  2. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    Lastly, manufacturers may decide to combine two type numbers into a single name, which their one device can replace, such as: 6DX8/ECL84 (6DX8 and ECL84 being identical devices under different naming schemes) or 6BC5/6CE5 (sufficiently identical devices within the RETMA naming system) and even 3A3/3B2, or 6AC5-GT/6AC5-G (where the single type ...

  3. Numerical relay - Wikipedia

    en.wikipedia.org/wiki/Numerical_relay

    The relay analyzes the resultant A/D converter outputs to determine if action is required under its protection algorithm(s). Protection algorithms are a set of logic equations in part designed by the protection engineer, and in part designed by the relay manufacturer. The relay is capable of applying advanced logic.

  4. Reference designator - Wikipedia

    en.wikipedia.org/wiki/Reference_designator

    The reference designator usually consists of one or two letters followed by a number, e.g. C3, D1, R4, U15. The number is sometimes followed by a letter, indicating that components are grouped or matched with each other, e.g. R17A, R17B. The IEEE 315 standard contains a list of Class Designation Letters to use for electrical and electronic ...

  5. ZILOG Announces New "ZAURA™" RF AC Power-Switching Relay ...

    www.aol.com/news/2013-02-14-zilog-announces-new...

    This AC Power Switching Relay with ZAURA Control reference design features a90-240V AC RMS input voltage range, up to 10 amps of load current, less than 2mA of standby current at 120V AC when in ...

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  7. Relay - Wikipedia

    en.wikipedia.org/wiki/Relay

    The National Association of Relay Manufacturers and its successor, the Relay and Switch Industry Association define 23 distinct electrical contact forms found in relays and switches. [12] Of these, the following are commonly encountered: SPST-NO (Single-Pole Single-Throw, Normally-Open) relays have a single Form A or make contact. These have ...

  8. Protective relay - Wikipedia

    en.wikipedia.org/wiki/Protective_relay

    Electromechanical protective relays operate by either magnetic attraction, or magnetic induction. [9]: 14 Unlike switching type electromechanical relays with fixed and usually ill-defined operating voltage thresholds and operating times, protective relays have well-established, selectable, and adjustable time and current (or other operating parameter) operating characteristics.

  9. The 20 best sales this weekend: Candy for stockings, wool ...

    www.aol.com/lifestyle/the-20-best-sales-this...

    Consider this your formal warning: Christmas is less than two weeks away (!), so it's time to get a move on buying stocking stuffers and last-minute gift ideas — even if they're just gift card ...

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