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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 grids and to power large motors and other large loads. Three phase transformers carry many product specifications, including transformer type, winding turns, cooling method, core type, and mounting style. Performance specifications, regulatory approvals, and special features are also important parameters to consider. Performance specifications include operating frequency range, maximum primary voltage rating, maximum secondary voltage rating, maximum secondary current rating, power rating and operating temperature. Configuration styles for three phase transformers consist o f delta delta, delta wye (Y), wye (Y) wye (Y), wye (Y) delta, wye (Y) single phase, delta single phase.
Single phase transformers may be 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. Step-up transformers produce a secondary voltage that is larger than the primary voltage. Step-down transformers have a secondary voltage that is smaller than the primary voltage. Variable single phase transformers are devices with a setting for changing the turn ratio as needed. One-to-one transformers well known as Isolation Transformer are single phase transformers with a turn ratio of 1:1.
Akurdi, Pune, Maharashtra 