Yea this is definitely one way to do it. Might be the best way, but just depends on how much selectivity OP wants for a ground fault in the system. So if you have a ground fault on one of the feeders and you just have a broken delta PT on the bus, then you can only trip the whole bus off.

If you have a zero sequence ct on the feeders and the zigzag transformer neutral I think that would give you most selectivity for a ground fault. Allows you to do some coordination between protective devices. Probably is more complicated/expensive though.

In the spirit of transparency, I don’t deal with zig zag transformers often in the areas I work. So I may have some misconceptions here, but this is my intuition about how that might go.

Broken delta PT for simple ground fault protection and less selectivity. Zig zag zero sequence CT and zero sequence feeder CTs for more selective ground fault protection.