Optical Current Transformers are based on the Faraday effect that causes a change in the polarization angle of the light when it crosses a magnetic field. Optical Current transformers stand-out in terms of accuracy range (which is virtually unlimited), safety (no risk of explosive failures), environmental protection (no SF6) and they are fully passive. The only active element in the system is the IEC61850 Merging Unit.
A modular optical current transformer that can be used for any voltage level. The device is based on three elements: an optical current transducer (SDO-ICT), the insulator and the merging unit (SDO MU).
the source is : https://www.arteche.com
the source is : https://www.arteche.com
