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Selection & support
Plan the busbars, holders and device adapters of a low-voltage panel from one range.
LEIPOLE supplies the panel busbar system from one range: double-T copper busbars of 720 mm², LPSU busbar holders for flat bars 12 to 30 mm wide and 5 or 10 mm thick at 60 mm spacing, SU busbar terminals for cables of 1 to 185 mm², busbar adapters from 25 to 600 A that carry ABB, Schneider Electric, Siemens and Hager circuit breakers, connection modules and LPA NH fuse holders up to 630 A, busbar covers and copper earth bars.
See busbar terminalsA busbar system replaces many parallel cables with rigid copper bars. Circuit breakers and fuse holders clip onto the bars through adapters, so a panel needs less wiring time and space, has fewer and repeatable connections, and the large surface area of the bars helps heat dissipation. The current-carrying capacity depends on the cross-sectional area and the allowed temperature rise, which IEC 61439-1 verifies for low-voltage switchgear assemblies.
See busbar adaptersCopper conducts better: aluminium has about 61 % of its electrical conductivity, so an aluminium bar needs roughly 1.6 times the cross-section for the same resistance and voltage drop, and its joints need more care. Copper is the usual choice inside control panels. The LEIPOLE double-T busbars are copper and the ground busbars are tinned copper rated 225 to 375 A.
See copper earth bars