why isolation transformer is used in ups?

An isolation transformer is used in uninterruptible power supplies (UPS) to provide electrical isolation between the input and output circuits. This isolation enhances safety by protecting sensitive equipment from electrical faults and surges. Additionally, it helps reduce noise and interference, improving the quality of the power supplied to connected devices. By isolating the load from the mains supply, the transformer also minimizes the risk of ground loops and enhances overall system reliability.