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Every once in a while, in Tech Support, we get a call from one of our customers asking which wires to connect to our multi-tap transformers. This is understandable considering all the wires involved, but luckily the solution is an easy one to remember once you know it. A large part of being able to figure this out is knowing how your 3-phase incoming power is set up. The wye configuration also looks a bit like a flux capacitor from Back to the Future if that helps. Please note that not every delta or wye set up will have these voltages, these are just two examples.
The main point to get from this is that your incoming power typically has three phases and one neutral. This allows each configuration to provide two to three different voltages. Usually, between neutral and a phase is a smaller voltage, and between two different phases is a larger voltage.
Knowing which voltage is between which two wires is key when installing one of our multi-tap transformers. Then separately insulate each of the unused wires. Take a look at the wiring diagram for our TR50VA :. If you wanted to use Vac on the primary, you would take any two of the three phases and connect them to the orange and black wires on the transformer.
For the above wye configuration, you would connect your neutral GRAY and any phase to the black and brown wires on the transformer for a Vac primary. Similarly, any two phases on the wye configuration should be connected to the gray and black wires on the transformer for a Vac primary. Hopefully this clarifies how to wire one of our transformers. Tym Moore is an Electrical Engineer who hails from the best state of Colorado.
He graduated from Colorado State University in and moved to Indiana shortly afterward to marry his now wife. Outside of work, Tym spends most of his time driving back home, and complaining about how flat Indiana is. Be sure to give Tym a call for tech support.
He will always do his best to find a solution for you. Author: Tym Moore. Category: Tech Tuesday. Facebook Twitter LinkedIn Reddit.Power transformer hook up
email: [email protected] - phone:(220) 841-9322 x 3025
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