Accessories for 3KC4, 3KC8 auxiliary switches include 2 changeover contacts: 1 changeover contact for POS I, II for 250-630A leading includes 1 piece including screw set 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.