United Rentals is a leading supplier of transformers for rent, designed for efficient and consistent power conversion and distribution. These temporary power supply transformers are designed for safe and easy installation through industry-standard connectors. Our fleet has reliable single- and three-phase transformers that are excellent for powering jobsite trailers and loads from the same power source and are complete with step-down and step-up options for power conversion. Transformer rentals are commonly used in various industries, like construction, entertainment, sports and more. Our inventory has a range of units, including this 2,500 kVA step-down transformer, designed for heavy-duty power needs, as well as this 15 kVA transformer for smaller applications.
Learn more about transformers in our FAQ section below.
To determine what size transformer you need, analyze your existing power system and use that information to calculate a corresponding transformer. When sizing your transformer, it's important to consider input and output voltage, as well as the VA rating that your specific worksite requires. Additionally, to find the kVA you’ll have to make a series of calculations based on your electrical schematics. Need more help? Contact one of our equipment experts for further guidance.
United Rentals offers three different types of electrical transformers: step-up, step-down and isolation transformers. Step-up transformers are designed to increase voltage. Step-down transformers decrease voltage. Isolation transformers have isolated primary and secondary windings to reduce voltage spikes in the supply line. Transformers commonly employ multiple types at once. For example, isolation transformers are capable of both stepping up and down voltage levels.
A step-up transformer increases from input to output voltage and is typically used for enhancing and boosting voltage for power equipment with higher voltages. A step-down transformer decreases from input to output voltage, making transmission power cheaper and safer.