Product Description

Three Phase Transformers Three phase transformers are designed to supply electric power to three-phase systems. These electrical devices have three circuit conductors and may or may not have a neutral wire. Three phase power is used by electric power distribution girds and to power large motors and other larges loads. Three phase transformers carry many products specifications, including transformer type, winding turns, cooling method, core type, and mounting style or form factor. Performance specifications, regulatory approvals, and special features are also important parameters to consider. Three are many types of three phase transformers. Products include Resin cast Coil, High Voltage, Industrial Control, and Inverter Transformers. Categories of three phase transformers also include isolation, multi-ratio, neutral grounding, power, rectifier, resonant, and substation transformers. Autotransformers are used mainly in low-power applications. They include variacs or variable autotransformers. Like other types of transformers, three phase transformers are used to increase or decrease the voltage from one side of the transformer to the other. The turn ratio or number of windings on the primary and secondary sides of the device determines the change in voltage. One-to-one three phase transformers have a tum ratio of 1:1 or near 1:1. Variable transformers are three phase devices with a setting for changing the tum ratio as needed. Step-up transformers produce a secondary voltage that is larger then the primary voltage. Step-down transformers have a secondary voltage that is smaller then primary voltage. Core Type, Cooling Method, Output Voltage and mounting or factor are additional product specification to consider when selecting Three Phase Transformers. Core Types are listed as EI laminated, Trips, Toroidal, Rectangle and other. There are four choices for cooling method: Dry Type, Natural Air Cooled, Forced Air cooled, Oil Cooled, and other. There are a variety of from factors or mounting styles to choose from. Choices for three phase transformers include Chassis Mount, H-Frame, Modular Jack, Pad Mounted, Printed Circuit Board (PCB), and Pole Mounted. Selecting three phase transformers requires an analysis of performance specifications, device configuration, features, and approvals. Performance specifications include: - 1) Rated Power, 2) Primary Voltage (at no-load), 3) Secondary Voltage (at no-load), 4) Voltage Tapping Range, 5) Secondary Current Rating, 6) Operating frequency, 7) Vector Group, 8) Impedance, 9) Ambient Temperature, *0) With or Without Enclosure. Configuration styles for three phase transformers consist of delta – delta, delta – wye (Y), wye-wye(Y-Y), wye-delta. With regard to features, some three transformers are waterproof or rated for outdoor use.