| Auto Transformers do not provide the isolation between primary and secondary, which is provided by an Isolation Transformer. Auto transformer is not a solution for all applications. Check with your electrician and city codes to see if an auto transformer is suitable for your application. There are instances, when a distribution transformer output is lower than nominal. One solution is to replace the Distribution transformer with a new one. This can be costly. Auto Transformers are very useful in such applications. Auto Transformer is able to boost the output to the nominal value. The distribution transformer provides the necessary isolation, and auto transformer remedies the drop in the output voltage. This results in huge savings. Want to learn about Three Phase Autotransformer,please see following or click Single Phase Autotransformer | 
