Busbar support for distribution system EP, 60 mm system, rated operating current Ie=630A, poles=3, usable for 30x10, thermoplastic, silicone-free, chlorine-free, halogen-free, busbar support spacing according to short-circuit strength diagram of the distributor, expandable to 4 and 5 poles by plugging in the 1-pole SLPEN support at the top and bottom