Creating a concept design for a power supply system not only involves observing applicable standards and regulations, but also examining and clarifying economic and technical requrements. For electrical equipment selection should be based on whether the entire system can achive the best configuration, but not limited to the integral features of equipments. For example, in choosing of connection between cabinets and transformers for the distribution, it should take into account the connections between devices as a whole. rather than individual choice Comonents should not only be appropriate for rated operation, but should also be suitably dimensioned to witstand faults situations. A power distribution concept should also take the following points into consideration.
. Building type, use and form (for example, highrise building, flat buildings and number of floors)
. Load centers and possible supply and location for transformers and main distribution boards.
. Regulations and guidelines of building an authorities.
. Power supply company guidelines.
There will always be more than one possible solution which will have to be assessed in terms of its technical and economic advantages and disadvantages. In making this assessment, the following requirements should be a priority.
1-Simple and transparent design.
2-Long service life
3-High availability
4-Low fire load
5-Flexible adaptation to building modifications.
The above problems are frequently encountered in projects. bus bar system are able to meet requirements above thanks to its features, therefore more and more engineers increase their favor of busway system over cable for power transmission, PTC provides bus bar system with current rating rating from 25A to 5000A
