I know how CTs work.I also know that in all my years of design and application, your concern of a 'right angle' has never been part of any 'mounting instructions' that I have seen.
http://www.gedigitalenergy.com/products/specs/it_basic.pdf

Do you have a reference, or is this something you have made up?

It is quite apparent that you are not familiar with a corner-grounded system. There is no neutral, however because one phase is intentionally grounded, the NEC requires it it to be white.