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IEC 60947-3 Ed. 4.0:2020 (b)
低電圧開閉装置及び制御装置-第3部:スイッチ,断路器,スイッチ断路器及びヒューズ組合せ装置
Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units

発行年月日: 2020-04-22
状態: 有効
邦訳版: 無

規格概要
IEC 60947-3:2020 applies to switches, disconnectors, switch-disconnectors and fuse-combination units and their dedicated accessories to be used in distribution circuits and motor circuits of which the rated voltage does not exceed 1 000 V AC or 1 500 V DC.
This fourth edition cancels and replaces the third edition published in 2008, Amendment 1:2012 and Amendment 2:2015. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
  • addition of critical load current tests for DC switches (see 9.3.9);
  • addition of requirements for a conditional short-circuit rating for disconnectors, switches, and switch-disconnectors protected by circuit-breakers (see 9.3.7.2);
  • addition of new categories for high-efficiency motors switching (see Annex A);
  • addition of new Annex E for connection to aluminium conductors;
  • addition of new Annex F for power losses measurement.
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TC TC 121/SC 121A
ICS 29.130.20
備考
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