Description
保安电源子组项：该子组项包括保安段的工作及备用进线的断路器、仪控变进线断路器及仪控分段断路器等；
厂用电快切子组项：该子组项包括厂用电正常快切装置功能。
（3）厂用公用及备用电源功能组，它包括下列顺序控制子组项：
高压启动／备用电源子组项：该子组项包括启／备变高压侧断路器、隔离开关及6kV侧断路器、启／备变有载调压开关等；
低压厂用公用段子组项：该子组项包括6kV所联接的变压器6kV侧断路器、380V侧断路器及380V侧分断路器等。
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