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For the switch disconnector 3KD frame size 4 and 5 (630 A to 1600 A), the AC-23 switching capacities have been improved significantly so that no derating is needed for all values up to 690 V. This makes it possible to choose eventually a smaller frame size that needs less space and also saves costs.
3KD switch-disconnectors according to IEC 60947-1 and 60947-3 with rated uninterrupted current from 16 A up to 1600 A are now available. They are designed for applications with high requirements and used as main, emergency stop or maintenace switches in industrial applications, infrastructur and ...