1)Busbar Design Temperature rise considerations

Busbar Design Temperature rise considerations

Following are the points which need to be considered while designing the busbar system.

1) Material of busbar (e.g. For Aluminium final temperature is Limited to 85 °c
2) Shape of conductor
3) Arrangement of conductor(vertical or horizontal)
4) Volume of enclosure
5) Ventilation
6) Average ambient temperature
7) Material of insulating supports (e.g. SMC can safely withstand 150 °c).
8) Type of joint (e.g. plated joints can withstand higher temperature)
Kindly note that while claiming the ratings the manufacturer of the busbars made following assumptions

1) Ratings are for 50°c rise over 35 ° c ambient temperatures in still but unconfined air

2) For multiple bar arrangements, the space between bars is equal to the bar thickness

3) A.C. ratings are based on spacing at which proximity effect is negligible