IEC 61757-7-3 Ed. 1.0 b:2024 PDF

IEC 61757-7-3 Ed. 1.0 b:2024 PDF

This part of IEC 61757 defines the terminology, structure, and performance characteristics of fibre optic voltage sensors using a polarimetric measurement method. The document specifies test methods and procedures for measuring key performance parameters of these sensors. It addresses only the voltage sensing element and not the additional devices that are unique to each application.

The document does not specify the required performance values of optical polarimetric fibre optic voltage sensors, because these specifications depend on the designated application of the sensor and are typically defined by the user of the sensor. The required performance values are usually defined when designing a sensor for a specific application.

This document is part of the IEC 61757 series, which is dedicated to fibre optic sensors. Generic specifications for fibre optic sensors are defined in IEC 61757. The individual parts of the IEC 61757 series are numbered as IEC 61757-M-T, where M denotes the measure and T the technology of the fibre optic sensor. The IEC 61757-7-T series is concerned with voltage measurements.

Voltage measuring techniques are essential for controlling and diagnosing apparatus that support industry and society. Optical voltage sensors based on electro-optic effects have been developed to serve as voltage measuring devices. These sensors enable advanced voltage measurements without encountering the issues related to conventional electrical voltage sensors. Hence, they have been applied in various fields including power systems. Given the expected potential of this new fibre optic voltage sensing technology, several kinds of optical voltage sensors covering a wide range of applications have been developed by various manufacturers. The design of these voltage sensors depends on the specific application, which determines the target voltage to be measured, the configuration of the sensor, the signal processing method, and the installation method. When developing a new optical voltage sensor, the sensor performance and characteristics have to be specified and evaluated.