Transformer Primary and Secondary Grounding

[holysmart1]

I am trying to understand proper transformer grounding. I have a single phase 480v to 120/240 volt transformer. The secondary side neutral is bonded to the ground on the secondary side, which is bonded to the ground on the primary side. Is this grounding correct? Wouldnt this make the primary ground a current carrier since it is tied to the secondary neutral? Or am I completely misunderstanding how transformers work? I will admit my knowledge of transformers is lacking a bit.

 

[jim dungar]

Or am I completely misunderstanding how transformers work?

You may be misinterpreting how grounding, grounded, and bonding conductors work.
Bonding the neutral simply provides a point of reference so that fault/unintended current can return to its source.

 

[electrofelon]

Note that every grounded system is connected to every other grounded system. You cant have two grounded systems that are isolated, unless you get into different planets or moons. Also remember a transformer makes a new electrical source, so the current is returning to its source, the transformer, not another source such as the one supplying the transformer.

 

[infinity]

Wouldnt this make the primary ground a current carrier since it is tied to the secondary neutral?

No. There is no current on any EGC's under normal conditions.

 

[holysmart1]

That all makes perfect sense. Thank you so much everyone!