what is the use of isolation transformer in ups?

An isolation transformer in an uninterruptible power supply (UPS) serves to separate the output power from the input power source, providing electrical isolation. This enhances safety by protecting sensitive equipment from voltage spikes and noise. Additionally, it helps in reducing ground loops and improving overall power quality. By isolating the load from the mains, the transformer ensures that any disturbances on the input side do not affect the connected devices.