The applicable input AC voltage range of an ordinary transformer is plus or minus ten percent of the working voltage. It is 242V-198V. If it exceeds it, it will damage the Zhuan. The voltage will not be damaged, but the output voltage will decrease.
The switching transformer of the switching power supply adapts to a wide voltage range. The general input voltage is 160-270V. The new switching current is 90-270V.
For example, the power supply of various electronic devices such as the computer is switching power supplies.