Two independent busbars in one board. A feeder can be moved from one bus to the other, so a bus can be taken out for maintenance without dropping the load.

Rating plate
Double Busbar Panel
The double busbar is the answer to a plant that cannot be switched off. Each outgoing feeder has a selector that connects it to bus A or bus B; maintenance on one bus is done with the other carrying the site.
At 8000 A the constraint stops being the breakers and becomes the busbar itself — bracing, joint torque and temperature rise are what the type tests are actually proving.
The assembly is ours; the switchgear inside it is genuine, authorised-channel product from the makes you specify.
Built to the same standard, and able to share a lineup with this one.

PCC · 6300 A · Form 3b/4

MCC · 4000 A · Draw-out

PMCC · Combined

Chiller · AHU · BMS-ready
A drawing, a load list or a BOQ is enough to start. You'll get the ratings checked against the actual fault level, a general-arrangement drawing to approve, and a fixed price.