Transformer accuracy testing

Developing and production of measuring systems for accuracy testing of instrument transformers in the Electrical Engineering institute Nikola Tesla (EEINT) have been last for more than 60 years. The measuring systems for accuracy testing and calibration of current and voltage transformers are based on methods and devices that are developed in the EEINT. These systems are used for calibration of high accuracy standard transformers, as well as for ratio and phase displacement measurement of instrument transformers installed in the power and distribution utilities. The concept of these measuring systems fulfils the requirements of international standards: IEC, IEEE, ANSI and CAN/CSA. In the EEINT new generation of various devices and systems for the wide variety of instrument transformers testing application have been developed and built from 2002. to 2020.