What is an isolation transformer?

The isolation referred to in an isolation transformer means that the secondary and primary windings are separated by insulation to electrically isolate them, and they maintain a safe distance from each other. The isolation isolates the currents of the primary and secondary coils. The function of an isolation transformer is based on the principle of electromagnetic induction as well. Since the secondary side is not grounded, there is no potential difference between any wire on the secondary side and the ground, which makes it safe to use. An isolation transformer is often used as a maintenance power supply.

In addition, not all isolation transformers refer to a 1:1 transformer. Control transformers and power supplies for electronical equipment are also isolation transformers, such as amplifiers, radios, oscilloscopes, and lathe machine tool control transformers. Isolation transformers are widely used, which are also used in air conditioners.