Replace in the third paragraph "for not being maintained" with "do not require maintenance". Add, at the end of the fourth paragraph, after "pollution degree 2", the following text "and overvoltage category III". Add, after the second paragraph, the following note: NOTE 1 Additional requirements are necessary for circuit-breakers used in locations having more severe overvoltage conditions Add, after the fourth paragraph, the following text: For an environment with a higher pollution degree, enclosures giving the appropriate degree of protection are used. Add, after the tenth paragraph, the following text: This document does not apply to circuit-breakers for DC operation that are covered by IEC 60898-3. Delete paragraph 13: "For an environment [& ] should be used.". Renumber the existing note in paragraph 14 "NOTE 2".