Opening and closing of the contact points creates induced voltage.

触接点的开启与闭合产生感应电压。

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The driving voltage is the major factor for shortening the closing time.

发现影响电磁阀关闭速度的主要因素是驱动电压的大小；

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At rated control supply voltage less than 35% under-voltage should prevent breaker from closing.

在额定控制电源电压低于35%时，欠电压脱扣器应防止断路器合闸。

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