... up to 800V. It applies to distribution network circuit of AC 50Hz or 60Hz with rated working voltage up to 690V ... /690V Number ofpoles Flashoverdistance CM1-63L 63 (6), 10, 16,20, 25, 32,40, 50, 63 400 500 25 12.5 ... -400M 400 65/10 32.5/5 3 CM1-400H 400 100/20 50/10 3 CM1-630L 630 400, 500,630 690 ... -630M 630 65/10 32.5/5 3 CM1-630H 630 100/20 50/10 3 CM1-800M 800 630, 700,800 690 ...