Vertically Mounted PT's in ME switchgear?

[mosesnbklyn]

Anyone seen this before? I can't find a code reference but I can't confirm the OEM approves either. They are cast coil GE PTG5 2-fuse type.

Matt

M. Nissen,P.E.
Senior Electrical Engineer
Waldron Engineering & Construction

 

[dpc]

Do you have a specific concern? mounting orientation will have no effect on the PT itself. I'd contact GE (or whomever it is today) if you want to be sure.

 

[mosesnbklyn]

I reached out to GE - no response yet. Main concern are fuses, cables, mounting coming loose.

Matt Nissen, P.E.
IEEE Senior Member

 

[thermionic1]

Are these fixed units or draw out? What voltage class? If horizontally vertically mounted, how are the VT's removed from the circuit for inspection, test or maintenance?

 

[mosesnbklyn]

All 15kV fixed mounted. Original design had bolted covers for access, with the PTs mounted behind a load-break switch. Ideally they would be in a separate compartment, with a hinged access door. The LBS cubicle is very narrow. Not sure draw-out design is possible with metal-enclosed gear - standards dont seem to address some of these details. I would be comfortable with a wider design LBS cubicle accomodating horizontally mounted PT's, even if they are on 2 elevations.

Matt Nissen, P.E.
IEEE Senior Member

 

[stevenal]

Those look horizontal to me.

 

[mosesnbklyn]

Official response from GE: these PTs can be mounted in a vertical position as long as there is NO vibration. Probably not behind an LBS!

Matt Nissen, P.E.
IEEE Senior Member

 

[waross]

Elevations, not plans.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[dpc]

Thanks for letting us know what GE told you.

Dave