For OEMs and for those developing systems that run off electric power, knowing the specific parts and components to use for the most effective operation can often be a challenge, particularly if electrical engineering is not part of your background.
One important factor is the choice of the transformer to be used in the system. There are two primary considerations, a single phase or a three phase transformer. Within these two groups, there are different designs, configurations, and features that can be customized to create the right transformer for the job.
What is the difference between a single phase and three phase transformer?
The difference between the three phase or single phase transformer is in the design and the type of application. Both are used to either step down or step up (decrease or increase) the voltage between the two sides of the transformer.
The single phase transformer is designed with a single primary and secondary winding around a core. The three phase design includes three of each, for a total of three primary and three secondary windings around respective cores. The number of connections is also much greater on three phase transformers with a total number of twelve.
What happens if one of the three phase transformers fail?
In the event of a failure in one of the sets of windings on the three phase transformer, the two existing sets of windings still continue to operate. In some cases, and depending on the use of delta or Wye connections and the type of component getting power from the transformer, there may be equipment failure, loss of motor power or the system may continue to operate as normal. This is particularly true when the equipment or motor is not under load, and the transformer is large enough to continue to provide the necessary power.