An autotransformer is different than a standard type of transformer in that it only utilizes one winding in the design. A standard transformer uses a primary and secondary winding that are not connected electronically. With thea autotransformer, the winding is both the primary as well secondary, which allows for a smaller, lighter weight option.
The 3 phase autotransformer can be used to step down or step up voltages through the use of taps on the winding. Each of these taps has a terminal, as do the two ends of winding. These different taps are used in pairs to apply the primary voltage or take in the secondary voltage.
This results in windings in common, which allows the system to flow some of the currents from input to output while some will be transferred through induction. The different taps and configurations of the system can be used to create the necessary step up or step down capacity.
What to Consider
There will be several considerations when developing and designing a 3 phase autotransformer for a particular application. It will be essential to know the voltage requirements as well as where the taps will need to be positioned on the winding. Other issues such as power ratings, agency , and line frequency will also need to be considered during the development stage.
It will also be very important to consider the overall size of the devices as well as where the terminations will need to be in relation to the specifics of the installation. The 3 phase autotransformer will also need to be developed around the triple cores, and this will all need to match your requirements and specifications.
Finding a company that can produce custom three phase autotransformers will be the first step in the process. Make sure the company offers the full range of services from design and engineering through to full production to streamline the process and ensure quality control.
