Accessories for 3KD BG1/2, 3KF BG1 3KC0 size 1/2, auxiliary switch 1 changeover contact, electronically compatible with 500mm connecting cable. Comprehensive accessories for increased flexibility. From connecting bridges and auxiliary switches to various drives, fourth poles or contact covers: With a wide range of accessories, the load disconnectors and mains transfer switches can be used for different requirements and retrofitted at any time.