Secretary of less active service, the Secretary for the system is imperfect, the lack of legal protection.

秘书主动服务少，秘书职业资格鉴定体系不完善、缺少法律保障等。

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Therefore it can be widely applied to fault detection, protection for power system and active power filter.

因此，它可应用于电力系统故障检测、保护和电力有源滤波器谐波电流检测中。

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An active optical fiber current transducer is an important device used in power system for measurement and protection.

有源型高压光纤电流互感器是电力系统计量、保护的重要设备。

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