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  2. Electrical efficiency - Wikipedia

    en.wikipedia.org/wiki/Electrical_efficiency

    A premium efficiency electric motor: more than 90% (see Main Article: Premium efficiency). A large power transformer used in the electrical grid may have efficiency of more than 99%. Early 19th century transformers were much less efficient, wasting up to a third of the energy passing through them.

  3. File:Installing efficiency methods (IA installingeffici00knoe ...

    en.wikipedia.org/wiki/File:Installing_efficiency...

    Original file (1,233 × 1,670 pixels, file size: 26.01 MB, MIME type: application/pdf, 282 pages) This is a file from the Wikimedia Commons . Information from its description page there is shown below.

  4. IEC 60034 - Wikipedia

    en.wikipedia.org/wiki/IEC_60034

    It classifies five classes: IE1 (standard), IE2 (high) and IE3 (premium), IE4 (super premium efficiency), IE5 (ultra premium efficiency). For each class the efficiency is defined for a rated output range from 0.75 to 375 kW. In the European Community the IE2 class is mandatory for all new motors since 16 June 2011. The IE3 class will be ...

  5. Glossary of electrical and electronics engineering - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_electrical_and...

    An electrical component that stores energy in an electric field. capacitor-input filter A power supply network where a capacitor is the first element following the rectifier. capacitor voltage transformer In electrical power systems, an instrument transformer for measuring voltage that uses a capacitive voltage divider. capacity factor

  6. International Electrotechnical Vocabulary - Wikipedia

    en.wikipedia.org/wiki/International_Electro...

    The International Electrotechnical Vocabulary (IEV) is managed list of terms and definitions organized by the International Electrotechnical Commission (IEC), which is grouped in classes. It serves to promote the global unification of terminology in the field of electrotechnology, electronics and telecommunications.

  7. List of IEC standards - Wikipedia

    en.wikipedia.org/wiki/List_of_IEC_standards

    IEC TR 61127 High pressure xenon short arc lamps – Dimensional, electrical and photometric data and cap types IEC 61131 Industrial-process measurement and control – Programmable controllers IEC 61133 Railway applications – Rolling stock – Testing of rolling stock on completion of construction and before entry into service