Withdrawn IEC Design, location and application criteria for installed area gamma radiation dose rate monitoring equipment for use in nuclear power plants during normal operation and anticipated operational occurrences IEC Protection of persons and equipment by enclosures — Probes for verification IEC Test methods for the determination of bond strength of impregnating agents to an enamelled wire substrate IEC Measurement of smoke density of cables burning under defined conditions IEC Classification of insulating liquids IEC Non-broadcast video tape recorders. Methods of measurement IEC Electroacoustics — Instruments for the measurement of sound intensity — Measurements with pairs of pressure sensing microphones IEC TR Opportunity-charging of lead-acid traction batteries IEC DC or AC supplied electronic step-down convertors for filament lamps — Performance requirements IEC Auxiliaries for lamps — Capacitors for use in tubular fluorescent and other discharge lamp circuits — General and safety requirements IEC Capacitors for use in tubular fluorescent and other discharge lamp circuits. Performance requirements IEC Transformers for tubular discharge lamps having a no-load output voltage exceeding V generally called neon-transformers.
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IEC Ed. In Annex J, some aspects regarding the old type of SiC gapped arresters are discussed. Surge arrester residual voltage is a major parameter to which most users have paid a lot of attention to when selecting the type and rating. Typical maximum residual voltages are given in Annex F. It is likely, however, that for some systems, or in some countries, the requirements on system reliability and design are sufficiently uniform, so that the recommendations of the present standard may lead to the definition of narrow ranges of arresters.
The user of surge arresters will, in that case, not be required to apply the whole process introduced here to any new installation and the selection of characteristics resulting from prior practice may be continued. Annexes H and I present comparisons and calculations between old line discharge classification and new charge classification. This third edition cancels and replaces the second edition published in This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition regarding the new surge arrester classification introduced in IEC a Expanded discussion of comparison between the old and new classification and how to calculate or estimate the corresponding charge for different stresses.
List of International Electrotechnical Commission standards
Preview Abstract IEC is not a mandatory standard but provides information, guidance, and recommendations for the selection and application of surge arresters to be used in three-phase systems with nominal voltages above 1 kV. It applies to gapless metal-oxide surge arresters as defined in IEC , to surge arresters containing both series and parallel gapped structure - rated 52 kV and less as defined in IEC and metal-oxide surge arresters with external series gap for overhead transmission and distribution lines EGLA as defined in IEC In Annex H, some aspects regarding the old type of SiC gapped arresters are discussed. This second edition cancels and replaces the first edition published in and its amendment 1 published in This edition constitutes a technical revision.
IEC System of Conformity Assessment Schemes