16 KG Main Switches Nominal Ratings IEC 60947-3 SWITCHES - DISCONNECTORS - SWITCH DISCONNECTORS IEC 60947 is a safety and performance standard for low voltage switchgear (up to 1000V) which has universally replaced IEC 408 and combined specific requirements of many individual national standards. IEC 60947 is a uniform standard for most countries around the world and establishes a truly global marketplace. IEC 60947-3 is a section of the standard specific to switches. Importantly, it recognises that devices for the switching function and isolating function require very different performance criteria. Switching requires high performance of current carrying parts to make and break loads under normal and overload conditions, ie., motor reversing applications. Isolation requires high insulation, sufficient spacing of current carrying parts and mechanical integrity that the handle corresponds to actual contact position for the safety of maintenance personnel. Practicality of real life applications calls for three definitions within IEC 60947-3; Switches, Disconnectors and Switch Disconnectors. A switch does not have to satisfy the isolation and mechanical strength tests, and a disconnector likewise the load tests. A Switch Disconnector must satisfy all tests and is suitable for safety switch applications. A switch disconnector must have a direct drive late make early break auxiliary contact in series with a load breaking device to be suitable as a safety switch. Kraus & Naimer have developed complete products which satisfy all IEC 60947 criteria, some of which are listed overleaf. For further information, please contact our offices. Frame Size S0/S1 S0/S1 S0/S1 S0/S1 S0/S1 S1 S1 S1 S2 S2 S2 S2 S2 S2 S2 S2 S2 S2 S2 S2 S2 S2 S2 Type KG10A/KG10B KG20A/KG20B KG32A/KG32B KG41/KG41B KG64/KG64B KG80 KG100 KG105 KG125 (Tunnel) KG126 (Lugs) KG127 (Both) KG160 (Tunnel) KG161 (Lugs) KG162 (Both) KG210 (Tunnel) KG211 (Lugs) KG212 (Both) KG250 (Tunnel) KG251 (Lugs) KG252 (Both) KG315 (Tunnel) KG316 (Lugs) KG317 (Both) FOR HIGHER CURRENT RATINGS Please contact your nearest KRAUS & NAIMER stockist. S2 = 88mm x 88mm S1 = 64mm x 64mm S0 = 48mm x 48mm Cable Size mm2 2.5 6 6 16 16 50 50 50 95 M10 Both 95 M10 Both 185 M12 Both 185 M12 Both 185 M12 Both IEC 60947-3/VDE 0660, part 107 Rated Values Thermal Operational Utilization Category Current Current AC-23A AC-3 Iu/Ith AC-21A 3 x 380 V - 440 V A A kW kW 20 20 5.5 3.7 25 25 7.5 5.5 32 32 11 7.5 40 40 15 11 63 63 22 18.5 80 80 30 22 100 100 37 30 125 125 45 37 125 125 45 37 160 160 55 45 200 200 75 55 250 250 90 55 315 315 110 75
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