IEC 62271-101:2012 mainly applies to a.c. circuit-breakers within the scope of IEC 62271-100. It provides the general rules for testing a.c. circuit-breakers, for making and breaking capacities over the range of test duties described in 6.102 to 6.111 of IEC 62271-100:2008, by synthetic methods. This second edition cancels and replaces the first edition published in 2007 and its Amendment 1 published in 2011. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the first edition: - addition of the new rated voltages of 1 100 kV and 1 200 kV; - revision of Annex F regarding circuit-breakers with opening resistors; - alignment with the second edition of IEC 62271-100:2008 and its Amendment 1 (2012). This publication is to be read in conjunction with IEC 62271-100:2008.
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