ABB MNS R System Manual

Also see for MNS R: Installation manual

ABB SACE 7Busbar compartmentThe busbar compartment is locatedin the middle section of theswitchgear. Main busbars can be lo-cated at the top, in the centre or atthe bottom of the panel depending onthe selected design and they distrib-ute the power to the variousswitchgear panels. In some of the ex-isting configurations main busbarscan be directly connected to a circuit-breaker as well. Distribution busbarsare located into the single column andpositioned vertically to feed panel cir-cuit-breakers. The busbar system canbe composed by 1, 2 or 3 busbarsper phase, according to requestedrated current, short-circuit level andoperational ambient conditions interms of temperature, altitude andhumidity. Busbars are normally barecopper made, on request can be suit-ably treated with tinning, silver-platingand/or sheathing.Main busbar system with connections for incoming busbars and bus-tie from the topMain busbarsMNS R main busbars are available forcurrents up to 6300 A. Main busbars,as well as distribution busbars, can becompletely segregated. Each MNS Rpanel can be fitted with three busbarsystems at the same time (top-cen-tre-bottom) each segregated from theothers.Detail of a compartment with entry from the top and connection on the main busbar system