BUSBAR TRUNKING SYSTEM involves distribution of electrical power using set of copper/Aluminum bus bars enclosed in suitable encloser with high degree of protection against any ingress of foreign bodies.
Following are some advantages of Bus bar trunking system over normal cabling system:-
Busbar versus Cables for Riser Applications:
|1||Number of circuits||One circuit per floor. Hence for a 20-floor building, you need 20 circuits.||Just one circuit can cover all floors.|
|2||Main Switchboard||Need 1 outgoing for each circuit. Hence 20 nos. MCCB outgoings. Higher cost and larger space requirement in electrical room||Need only 1 outgoing for each riser. Lower cost and size of main panel.|
|3||Shaft Size||Using 4 core cables, and considering 1 cable per feeder, you need 20 cables on the lowest floor. Large space required for cables/ cable tray.||Typical size of 1600A riser is 185mm x 180mm. Leads to big savings on riser shaft size, and hence more usable floor area on every floor.|
|4||Fire & safety||The high concentration of insulating materials used in cables and conductors involves a very high level of combustive energy.||The volume of insulating materials used in trunking is reduced to a minimum so combustive energy is considerably lower than cables. The insulating materials used do not release corrosive or toxic gases in the event of a fire. Once the source of the fire is removed, these materials are extinguished in a few seconds so that the effect of the fire is minimised.|
|5||Combustive Energy – see table enclosed||1600A – approx 60 kWh/sq.m||1600A – approx 5 kWh/sq.m.
Combustive energy is typically 80% -90% less than cables.
|6||Future expansion||If load on any floor exceeds initial plan, owner has to run an additional cable from a spare feeder on main board to that floor.||By providing extra tap off slots on each floor at the design stage, owner only has to procure a tap off box and plug it in wherever additional load is required. As the plug in can be done live, there is no shut down required for any of the existing clients / circuits. Future Flexibility.|
|7||Fault withstand levels||Limited by conductor size of each circuit.||Much higher – typically a 1600 A riser has a fault withstand capability of 60 to 70 kA. Safer in an electrical fault.|
|8||Installation time||Much longer||Each riser on a 20-floor building can be installed in approximately 2 to 3 days.|
|9||Voltage drop||High impedance if you choose cable size based on each floor current rating.||Much lower impedance. Hence substantially lower voltage drop.|
Dear Sir/Madam, I liked your information about rising main but we need some comparison with FACTORY AREA having 280 machine and haveing 4 trasnformer connection its spinning mill . Please give more detail about your company have bussiness in common.
For busbar trunking system is really critical preliminary engineering work.
I want know BBT.
Thank you very much to the information you have given, a knowlege that I will treasure,please i would like to request a simple design how big is the bus bar if I put a certain power from supply side to load side
Thaank you very much
I am a electrical design enginner currenly involved with electrical system design of an international airport. I need information of a LV enclosed bus bar trunking system to coonect LV side of a 11kV/400V 1250 kVA transfor and 2000A, 400V ACB. Would you please mail me its detail and price per meter of such system.
Good general knowledge. We can use in setting up of our new plant especially from safety viewpoint and ease of maintainence. Thank you for summarizing so aptly.
BUSBAR TRUNKING RATE OF CUPPER BAR