Advantage on Single Busbar Design

You're the designer; you tell me.

What have you got so far?

I need to convince my Client that single busbar configuration is as good as double busbar.

At the moment i know advantage for single busbar is lowest cost compared to other configuration. For double busbar, ease of maintenance and higher reliability.

Is there any other advantages i missed out.

Have you considered bus bar mounting hardware in the advantage/disadvantage equation?

What about bus bar support hardware (which may differ between single and double bus bar arrangements)?

In the end, cost and maintenance downtime are likely going to be the key points the customer is interested in, with everything else being a 'feature' or 'nice to have'.

Also, have another look at maintenance as you may find that there is not much difference in maintenance advantage between single and double bus bar systems, a single bus bar is heavier but double bus bar has more connections to check and remove.

Also I would argue that double busbar arrangement doesn't have higher reliability for the same reasons and the fact that unless one of the bus bars in the double bus bar system is redundant and the other can handle the full rating of the substation, you are not gaining an increase in reliability over a single bus bar.