取样信号板上T3为取样变压器，将整流变压器一次电压(0 ~ 380v)变为0 ~ 10v交流电压。

T3 on sampling signal panel is sampling transformer, which can convert primary voltage (0 ~ 380v) of primary transformer into 0 ~ 10v AC voltage.

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并以额定一次电压35KV，额定二次电压100V，额定频率50HZ的电压互感器为例，进行了有限元分析计算和优化设计。

As an example, Finite element analysis and optimization design are made to a voltage transformer of rating primary voltage 35KV, rating secondary voltage 100V, rating frequency 50HZ.

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当电容器电压达到一定程度，它便会激活晶体管；晶体管打开，雨刷运转一次。

When the voltage in the capacitor reached a certain level, it triggered the transistor; the transistor turned on, and the wipers wiped once.

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