transformer turn-to-turn insulation test

例句：

1. 1. The transformer is responsible for converting alternating current to direct current.
   变压器负责将交流电转换为直流电。
2. 2. The transformer's design is crucial for the power system's stability.
   变压器的设计对于电力系统的稳定性至关重要。
3. 3. The transformer was designed to improve the efficiency of the electrical grid.
   变压器被设计用来提高电网的效率。