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    3-Phase Transformers

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    3-Phase Transformers

    Why use a 3 phase transformer?

    When you’re using a 3 phase supply, it only makes sense to use a 3 phase transformer. These transformers are used to convert the supply voltage from one type to another. They also have isolating capabilities.

    Technically speaking, and when looking at a transformer wiring diagram, it is possible to connect three separate single phase transformers to service a 3 phase supply; however, 3 phase transformers are built specifically for these tasks, and require far less energy, effort, material and money to operate. The most obvious difference between a single phase transformer and a 3 phase transformer are the windings. A 3 phase transformer is composed of three sets of single phase windings together on a single core, and not 3 separate devices connected together.

    When should I use a 3 phase transformer?

    3 phase transformers are used to handle heavy electrical loads. One of the most common usages of 3 phase transformers are motor applications since they can effectively handle the heat, vibration, and voltage of these heavier motor loads. 3 phase transformers are also used throughout industrial and commercial sectors for power generation, motor applications, and any other industry that deals with 3 phase power.

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    Your one-stop shop for 3 phase transformers.

    When you’re looking to purchase a 3 phase transformer, Bay Power is all you need. From 30 kVA, 45 kVA, and 75 kVA 3 phase transformers to 3 phase step up and step down transformers, you can count on us for all your 3 phase transformer needs. Discover our expert service and expansive selection of 3 phase transformers today.

    Step-Up 3-Phase Transformers

    These transformers are a type of buck boost transformer that only increase the voltage in small increments. The current going through the secondary winding of these transformers are larger than the current going through the primary winding. Step up transformers can be used for applications as big as power plants to those as small as x-ray machines or even microwave ovens.

    Step-Down 3-Phase Transformers

    The complete opposite of step up transformers, these decrease the voltage in small increments. The outgoing current of these 3 phase electrical transformers is ultimately less than the supply current. 3 phase step down transformers are commonly used for domestic equipment and smaller appliances to provide safe voltage levels for everyday use.

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    Why Bay Power

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    Fill your wallet, not the landfill.

    Have any old or unused 3-Phase Transformers lying around? Don’t get rid of them just yet. While we stock a wide range of quality electrical products and solutions, both new and reconditioned, we also buy back your unwanted equipment. So, before deciding what to do with your old 3-Phase Transformers and components, have one of our expert technicians take a look to see if we can save a few parts, save the environment, and save you some cash.

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    Great service shouldn’t end after the purchase. We pride ourselves on the relationships we build with our customer-first mentality and the quality of our 3-Phase Transformers and components. That’s why we offer a 1-year replacement warranty on all of our electrical products and solutions from the top manufacturers. Because when you buy with Bay Power, you buy with confidence.

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    Product Condition FAQ

    We are proud to stock a variety of competitively priced, new and reconditioned components from the leading manufacturers of 3-Phase Transformers.


    Thanks to our extensive inventory of 3-Phase Transformers and components, our resourceful and expertly trained staff will always be able to get the products that you need. Through our extensive network of suppliers, we are able to carry and acquire a huge variety of electrical products and solutions, so chances are if you need it, we can get it.


    Bay Power’s priority is providing you with reliable, high quality electrical hardware. That’s why our mission is to make sure our reconditioned electrical products and solutions function as perfectly as the day they were built. Because while the quality is high, the cost of 3-Phase Transformers shouldn’t be.

    New Surplus

    Our selection of new surplus 3-Phase Transformers may not arrive brand new in a box, but they function just as well, and have never had electricity run through them. All of the quality, none of the packaging, always with our 1-year replacement warranty.