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I-0-II Manual Switch for Dual Power Supply: Switching switch designed for manual switching between main and backup power supply, with three stable I-0-II positions. The central position is OFF, useful for insulation and safety when manoeuvring. 1P, 2P and 4P variants, all from 63A: three versions of 63A to adapt to different system configurations. Ideal for switchboards where clear and reliable switching between two power lines is required. 35 mm DIN rail installation: compact structure for DIN rail mounting, practical for civil, technical and light industrial electrical panels. The catalogue also indicates clamps suitable for cables up to 25 mm². 240/415V, 50/60Hz, IEC 60947-3 compliant: manual switch for 240/415V~ systems, frequency 50/60Hz, with IP20 protection rating and construction complies with IEC 60947-3. Suitable for normal network and backup line or generator: the catalog shows typical usage with normal power supply and alternative power / generator set. It is indicated that the input circuit must be protected with an appropriate MCB.