Busbar
IEC 60617 (single-line diagram symbols)
Drawn as
A thick horizontal line with feeders dropping from it, labelled with the board name and voltage.
Meaning
Switchboard busbar section: main, essential and emergency boards. The busbar belongs to the switchboard (switchgear); it is not modelled separately.
Variants
- Bus couplers (ties) are drawn as a breaker linking two bars
- Double busbars are two parallel thick lines
Tags
BB
Not physical hardware. Read it, then skip it in the 3D model.