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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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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