(1) Firstly, it should be considered that the shutdown of this voltage transformer may cause malfunctions in related protections (such as distance protection) and automatic devices (such as auto-transfer). Therefore, it is necessary to apply for the shutdown of the relevant protections and automatic devices first. (2) Shutting down the voltage transformer includes operating the knife switch on the high-voltage side, disconnecting the secondary air switch or fuse to prevent reverse charging on the secondary side.