Bus bar

Description/ Specification of Bus bar

Bus bars used in electrical power systems are conductors with large current carrying capacity. Bus bars are installed in switch yards, indoor switch gear panels, distribution boards, near battery banks etc. Typically, a bus bar has many incoming and outgoing feeders connected to it. Therefore, they receive power from different sources like generators, incoming lines etc and dispatch an equivalent amount of power through different outgoing lines to points of consumption or for further transmission. Bus bar conductors are usually made of copper or aluminium. Indoor panel mounted bus bars are generally solid bars of copper running along the distribution boards. The various tappings (outgoing and incoming) are bolted or welded to it, Bus bars are supported on insulators and sufficient clearance is kept from the metal enclosure walls. Busbars may be arranged in separate sections with provision of isolation for doing maintenance. Outdoor bus bars in switch yards are usually of hollow tubular construction to minimize corona loss. These bus bars are made of aluminium as it is economic and has excellent corrosion resistant properties. However, for enclosed applications such as in switchboards, copper is the preferred material due to better electrical conductivity. Bus bars being the heart of power distribution/transmission centres, elaborate protection and interlock arrangement is configured for them for protection during electrical faults or disturbances. As they conduct very high amount of power, heat is generated and hence appropriate cooling arrangement is provided. Bus bars which run inside metallic enclosure such as those taking out or bringing in bulk power to from outside transformer may require special cooling and dehumidification arrangement, as moisture deteriorate the insulating property of air inside. This page shows the catalogues of companies offering bus bars.

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