277V Step down XFMR

[CliffD]

Hello all,
Any help on this would be appreciated.
If I put a 277V step down XFMR to 120V to feed some 120V fixtures (lightolier #7997) on the same circuit with 277V fixtures; will this work with two different voltages feeding back on the same neutral?
I found this transformer (see attached) that looks like will accomplish this, but all of my colleagues tell me it won't work due to the neutrals.
Any thoughts?

Thanks,
Cliff

 

[david luchini]

It appears you have a buck-boost autotransformer. The autotransformer will need an input fuse not greater than 1.8A per 450.4(A)Exc. Can't tell if its supplied with the transformer from the cuts.

But I don't see any reason that it wouldn't work together with other fixtures on the same 277V branch circuit.

 

[rcwilson]

That's a standard autotransformer setup. It will work.