Information AboutBusbar |
| CATEGORIES ABOUT BUSBAR | |
| power components | |
| SHOPPER'S DELIGHT | |
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The size of the busbar determines the maximum amount of current that can be safely carried. Small Distribution Board s or Consumer Unit s may have busbars which have a cross sectional area of as little as 10 mm2 but large Electrical Substation s may use metal tubes of 50 mm or more in diameter as busbars. Busbars are typically either flat strips or hollow tubes as these shapes allow Heat to dissipate more efficiently due to their high Surface Area to Cross-sectional area Ratio . Additionally, the Skin Effect makes AC busbars more than about 8 mm (1/3 in) thick inefficient. Busbars may be used to carry phase (line, hot, live) voltage in which case they must be suitably Insulated . Such insulation may either completely surround the busbar, or alternatively the busbar itself may be uninsulated but physically mounted using an insulating material to keep it electrically separate from its support. In the latter case the busbar is protected from accidental contact either by being surrounded in a sheet metal enclosure or by being placed out of normal reach. Neutral busbars are also insulated. Earth busbars are typically bolted directly onto any metal chassis of their enclosure. EXTERNAL LINKS
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