Therefore, the electric power system needs a standard urgently of the open type transformer substation automation correspondence system.
因而，电力系统火急需求一个规范地开放式变电站主动化通讯系统。
The current transformer is open-close type.
本型电流互感器为开合式。
The zero sequence current transformer is open-close type.
本型零序电流互感器为开合式。
The zero sequence current transformer is open-close type.
本型零序电流互感器为开合式。
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