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      • ICS
      • Electrical Engineering
      • Switchgear And Controlgear
      • High Voltage Switchgear And Controlgear

      Codes & Standards - Purchase

      IEC 62271-103:2021

      High-voltage switchgear and controlgear - Part 103: Alternating current switches for rated voltages above 1 kV up to and including 52 kV
      SKU: iec_064656_110131 Published by IEC Publication Year 2021 2.0 Edition 179 pages

      Product Details

      • Overview
      IEC 62271-103:2021 is applicable to three-phase, alternating current switches and switch-disconnectors for their switching function, having making and breaking current ratings, for indoor and outdoor installations, for rated voltages above 1 kV up to and including 52 kV and for rated frequencies from 162/3 Hz up to and including 60 Hz. This document is also applicable to single-pole switches used on three-phase systems. This second edition cancels and replaces the first edition published in 2011. This edition constitutes a technical revision.
      This edition includes the following significant technical changes with respect to the previous edition:
      - this document has been aligned with IEC 62271-1:2017 and IEC 62271-102:2018;
      - clarifications regarding the behaviour of the switch during breaking tests regarding current interruption and restrikes have been added;
      - conditions of the switch after making and breaking tests have been clarified;
      - a new informative Annex B intended to provide guidance for the calculation of Ief1 and Ief2 has been added;
      - new rules for the combination of 50 Hz and 60 Hz switching tests have been defined and a new table (Table 7) has been added;
      - tests with specified TRV have been modified to be in accordance with the practice described in IEC 62271-100;
      - the behaviour of the switch during breaking tests has been clarified and boundaries for restrike allowance have been defined;
      - explanations for short-circuit making tests have been added;
      - vacuum integrity check after mechanical operations has been defined;
      - all test voltages for single-phase capacitive testing have been grouped under 7.101.7.3.2 and have been confirmed by simulation and calculation.

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