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Delta-Delta Transformer Question

2K views 16 replies 5 participants last post by  testify 
#1 ·
Hello,

I am installing a repurposed 600V-208V 75kva delta-delta transformer that the client had in their shop. I am feeding a small panel for some general 120v receptacles. I understand that I can get 120v by tapping between 2 of the phases, but how do I see that in this transformer? Whoever had used this previously has this cable taped white which initially made me think that this was the neutral tap, but looking at where it is tapped it just seems like a ground to me? Can anyone offer me any assistance? Thanks!

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#3 ·
That’s a 208 star, not a 208 delta, the neutral-center point of the connection should be grounded. A 208 delta would be a real rare item.
You will see 120 vac from blue black and red to the white neutral.
Pet peeve time here, set the tap so you have 208 vac at the secondary and not 220 or 200, rant off.
Oh sweet, thanks!

Weird how the side of the unit just says 208, where other wyes I've seen say 120/208

Appreciate your time
 
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