TVSS Mounted to the side of a Transformer

[ed downey]

I was walking a project today and noticed that the TVSS for the branch circuit panelboards have been (Factory) mounted to the side of the 75KVA Harmonic Mitigating transformer (Manufactured By Hammond).

I am not sure how this can be done since there is not any overcurrent protection for this unit.

Has anyone ever seen this before?

-Ed

 

[bdarnell]

Maybe the unit was internally fused. We order ours that way. Either way, there has to be a disconnect somewhere. You are permitted to connect them to the supply side of a service, but you still have to have OCP and a disconnect.

 

[ryan_618]

Was it dual listed as a surge arrestor?

 

[ed downey]

I am not sure. I have asked the Project Manager for a copy of the Submittal to review the manufacturers literature.

-Ed