IEC 61757-4-3:2020定义了使用偏振法的光学电流传感器的术语、结构和特性测试方法。它只针对电流传感元件，而不是针对每个应用程序唯一的附加设备。IEC 61757中定义了光纤传感器的通用规范。由于每个用户所需的旋光光纤电流传感器的规格因应用而异，因此本文件未定义所需的性能值。根据具体应用设计传感器时，会定义所需的性能值。

IEC 61757-4-3: 2020 defines terminology, structure, and a characteristic test method of an optical current sensor using the polarimetric method. It addresses the current sensing element only and not the additional devices that are unique to each application. Generic specifications for fibre optic sensors are defined in IEC 61757. As the specifications of optical polarimetric fibre current sensors required by each user vary depending on the application, this document does not define the required performance values. The required performance values are defined when designing a sensor according to the specific application.