When you may need an isolation transformer
An isolation transformer is designed to provide electrical isolation between the input and output circuits, typically by using a transformer with a 1:1 ratio. This isolation helps to prevent electrical noise, including RF power noise, from traveling between circuits.
When RF power noise is present in an electrical system, it can cause interference and disrupt the operation of electronic devices, such as computers, televisions, and radios. By using an isolation transformer, this noise can be filtered out, resulting in a cleaner electrical signal.
However, it's important to note that while an isolation transformer can help reduce RF power noise, it may not be effective in all situations. The effectiveness of an isolation transformer will depend on the specific source and characteristics of the noise, as well as the design and quality of the transformer itself.