Pode-se usar bus-bar, bus bar ou busbar, para barra/barramento. Chaves, neste contexto, é switchgear. Alguns exemplos:

Switchgear, boards, relays & motors engineering - single busbar or ...
... Please can anyone tell me where it is preferable to have double bus bar over
... Double bus bar enables planned shut down of one bus bar at a time for ...
www.eng-tips.com/viewthread.cfm?qid=119548&page=1

GIS : Gas Insulated Switchgear
... Dimensions per double bus bar bay <Height> (approx. m), 4.0, 4.2, 4.8.
Dimensions per double bus bar bay <Depth> (approx. m), 4.7, 5.7, 6.5 ...
www.tic.toshiba.com.au/website/newtic/gis_1.htm

[PDF] MNS – Modular Low Voltage Switchgear System
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... The busbar material is aluminium or copper depending. on the rated current. ... Each of the four switchgear buses can have up. to 32 motors connected. ...
www.abb.fi/.../viewunid/BE6729D85EE55A94C2256C410027B430/ $file/MNS%20-%20Brochure%20-%20English.pdf - Similar pages

Summary of Work - STP Module 4: Substations
... Deliverable:. Amended report S0409 for four switchgear manufacturers included in the study ... S4123: HV Metalclad Busbar Maintenance. Deliverable: ...
www.eatechnology.com/STP_LearnMore_Substations.asp