Y-Y solidly grounded Primary and Secondary?

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Snowjob

Snowjob

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Transformer.jpg


Does this trasnformer have a Y-Y solidly grounded Primary and Secondary?
The only thing I can go by is the statement "tank must be solidly grounded"

225 KVA Westinghouse pad Mount
 
LarryFine

LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
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Electrical Contractor
Snowjob said:
Does this trasnformer have a Y-Y solidly grounded Primary and Secondary?
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I don't see any grounding of the neutral point in the diagram. It shows the primary neutral connected to the secondary neutral, but it's labeled 'neutral disconnect.'

In most uses, the primary's neutral point should be left floating, and connected as a Delta load, although the POCO doesn't seem to leave it floating in their installations.

I'd read the instruction book as recommended on the label. If you don't have it, contact Westinghouse.
 
J

jim dungar

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PE (Retired) - Power Systems
Snowjob said:
Does this trasnformer have a Y-Y solidly grounded Primary and Secondary?
The only thing I can go by is the statement "tank must be solidly grounded"

225 KVA Westinghouse pad Mount
Click to expand...
The nameplate only shows that a single H0/X0 bushing is available. It does not say that bushing needs to be solidly connected to ground. It really depends on the primary service. However, it would be very unusual, and present some issues, if this type of Y-Y connection is used on any system that is not solidly grounded on both the primary and secondary. But, if the H0/X0 neutral link was removed/broken, then the transformer could be used in almost any application.

The picture of the wiring compartment, leads me to believe the system is solidly grounded.
 
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