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Standard

IEC 60071-2:2018 ED4

Revised

Note: Latest version: IEC 60071-2:2023 ED5

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Abstract

IEC 60071-2:2018 constitutes application guidelines and deals with the selection of insulation levels of equipment or installations for three-phase electrical systems. It gives guidance for the determination of the rated withstand voltages for ranges I and II of IEC 60071-1 and to justify the association of these rated values with the standardized highest voltages for equipment. It covers three-phase systems with nominal voltages above 1 kV. This edition includes the following significant technical changes with respect to the previous edition: a) the annex on clearance in air to assure a specified impulse withstand voltage installation is deleted because the annex in IEC 60071-1 is overlapped; b) 4.2 and 4.3 on surge arresters are updated; c) 4.3.5 on very-fast-front overvoltages is revised. Annex J on insulation co-ordination for very-fast-front overvoltages in UHV substations is added; d) Annex H on atmospheric correction – altitude correction is added. e) Annex I on evaluation method of non-standard lightning overvoltage shape is added. It has the status of a horizontal standard in accordance with IEC Guide 108.

Products specifications

  • Standard from IEC
  • Published:
  • Withdrawn:
  • Edition: 4
  • Document type: IS
  • Pages
  • Publisher: IEC
  • Distributor: IEC
  • ICS: 29.080.30
  • International TC: TC 99

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