Electropedia: The World's Online Electrotechnical Vocabulary |
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Electropedia (also known as the "IEV Online") is the world's most comprehensive online electrical and electronic terminology database containing more than 20 000 terms and definitions in English and French organized by subject area, with equivalent terms various other languages: Arabic, Chinese, German, Japanese, Portuguese, Polish, Spanish and Swedish (coverage varies by subject area).
Electropedia is produced by the IEC, the world’s leading organization that prepares and publishes International Standards for all electrical, electronic and related technologies – collectively known as “electrotechnology”. IEC standards cover a vast range of technologies from power generation, transmission and distribution to home appliances and office equipment, semiconductors, fibre optics, batteries, flat panel displays and solar energy, to mention just a few. Wherever you find electricity and electronics, you find the IEC supporting safety and performance, the environment, electrical energy efficiency and renewable energies.
The world’s experts in electrotechnical terminology work to produce Electropedia under the responsibility of IEC Technical Committee 1 (Terminology), one of the 175 IEC technical committees. |
Subject areas |
| 101 | Mathematics | | 551 | Power electronics |
| 111 | Physics and chemistry | 561 | Piezoelectric devices for frequency control and selection |
| 121 | Electromagnetism | 581 | Electromechanical components for electronic equipment |
| 131 | Circuit theory | 601 | Generation, transmission and distribution of electricity - General |
| 141 | Polyphase systems and circuits | 602 | Generation, transmission and distribution of electricity - Generation |
| 151 | Electrical and magnetic devices | 603 | Generation, transmission and distribution of electricity - Power systems planning and management |
| 161 | Electromagnetic compatibility | 604 | Generation, transmission and distribution of electricity - Operation |
| 191 | Dependability and quality of service | 605 | Generation, transmission and distribution of electricity - Substations |
| 195 | Earthing and protection against electric shock | 651 | Live working |
| 212 | Insulating solids, liquids and gases | 691 | Tariffs for electricity |
| 221 | Magnetic materials and components | 701 | Telecommunications, channels and networks |
| 311 | Electrical and electronic measurements - General terms relating to measurements | 702 | Oscillations, signals and related devices |
| 312 | Electrical and electronic measurements - General terms relating to electrical measurements | 704 | Transmission |
| 313 | Electrical and electronic measurements - Types of electrical measuring instruments | 705 | Radio wave propagation |
| 314 | Electrical and electronic measurements - Specific terms according to the type of instrument | 712 | Antennas |
| 321 | Instrument transformers | 713 | Radiocommunications: transmitters, receivers, networks and operation |
| 351 | Control technology | 714 | Switching and signalling in telecommunications |
| 371 | Telecontrol | 715 | Telecommunication networks, teletraffic and operation |
| 393 | Nuclear instrumentation - Physical phenomena and basic concepts | 716 | Integrated services digital network (ISDN) - Part 1: General aspects |
| 394 | Nuclear instrumentation - Instruments, systems, equipment and detectors | 721 | Telegraphy, facsimile and data communication |
| 411 | Rotating machinery | 722 | Telephony |
| 415 | Wind turbine generator systems | 723 | Broadcasting: Sound, television, data |
| 421 | Power transformers and reactors | 725 | Space radiocommunications |
| 426 | Electrical apparatus for explosive atmospheres | 726 | Transmission lines and waveguides |
| 431 | Transductors | 731 | Optical fibre communication |
| 436 | Power capacitors | 732 | Computer network technology |
| 441 | Switchgear, controlgear and fuses | 801 | Acoustics and electroacoustics |
| 442 | Electrical accessories | 806 | Recording and reproduction of audio and video |
| 444 | Elementary relays | 807 | Digital recording of audio and video signals |
| 445 | Specified time all-or-nothing relays | 808 | Video cameras for non-broadcasting |
| 446 | Electrical relays | 811 | Electric traction |
| 448 | Power system protection | 815 | Superconductivity |
| 461 | Electric cables | 821 | Signalling and security apparatus for railways |
| 466 | Overhead lines | 826 | Electrical installations |
| 471 | Insulators | 841 | Industrial electroheat |
| 482 | Primary and secondary cells and batteries | 845 | Lighting |
| 521 | Semiconductor devices and integrated circuits | 851 | Electric welding |
| 531 | Electronic tubes | 881 | Radiology and radiological physics |
| 541 | Printed circuits | 891 | Electrobiology |
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Electropedia contains all of the terms and definitions in the International Electrotechnical Vocabulary or IEV which is published also as a set of publications in the IEC 60050 series. The IEC Multilingual Dictionary on CD-ROM (2005), which offers an offline version of the IEV for users needing additional languages (12 in all), can be ordered from the IEC Webstore. IEC TC/SC chairmen and secretaries, as well as project leaders and working group convenors can request a copy of the CD-ROM from the IEC Central Office by clicking here.
Please help us improve Electropedia!
If you have any comments or suggestions on Electropedia or specific terms and definitions, we want to hear from you. Please send an e-mail to IEC Customer Services.
Can I use a term or definition from Electropedia? Yes!
While Electropedia’s structure and content are copyright IEC, we encourage the use, referencing or citation of Electropedia for the purpose of identifying or clarifying the meaning of electrotechnical concepts, terms and symbols and their use in manuals, diagrams and equipment. We only ask that IEC is referenced as the source. For users wishing to duplicate Electropedia or use large portions for commercially or for free sharing, please contact the IEC. |