Introducing the Solution: Delta-Wye Dry-Type Transformer

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Master Electrician Teaches his Son the Basics of 480-277 Volt Vs. 120-208 Volt Systems, Thoughts?

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What happens here

To overcome the voltage incompatibility, the solution involves installing a Delta-Wye dry-type transformer. These transformers are strategically placed throughout the facility where 120V or 208V power is needed. The video shows an example of such a transformer unit.

Goal: Understand the role of a Delta-Wye dry-type transformer in commercial electrical systems.

Tools and materials

Delta-Wye Dry-Type Transformer — Illustration of the transformer used for voltage conversion

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The majority in the United States, the standard is 480 volt four wire system. >> Okay. >> Brown, orange, yellow, gray. Yeah. Right. Then what happens? You cannot use 277 volt for a standard receptacle. What do we need to do? We need to put in a deltay dry type transformer throughout the facility where needed. Oh, we're going to tap off the 480 volt with a circuit breaker that's going to feed a transformer that's going to step that power down to 12208.

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