Isolation transformers are widely used in various electronic products, and their main functions include: voltage conversion; Impedance transformation; Isolation; Stable voltage (magnetic saturation transformer), etc. There are two common causes of transformer damage: primary overvoltage and secondary short circuit. Both of these faults will cause a significant increase in the "copper loss" (heat consumption when current flows through the coil) and "iron loss" (losses caused by eddy currents) of the transformer in a short period of time, and lead to an increase in coil temperature. If not dealt with in a timely manner, it will reduce the insulation of the coil and even cause the transformer to burn out. If the transformer experiences the above faults and is not cut off in a timely manner, the related components in the circuit will also experience overload or overload operation. In severe cases, it may cause failure due to overheating, resulting in damage to local circuits.

One set of input 380V (red), two sets of output 220V/0.1A (yellow, green), 11V/1.2A, 11V/0.4A (blue brown), control cabinet input 380V connected to 201 and 205, output 216, 168, 223, 224 connected to 220V.