Measuring transformers are devices that transform, that is, convert measured voltages and currents to values that are suitable for powering measuring instruments, as well as regulatory and protective devices in the system. They are divided into current, voltage and combined. The installation of measuring transformers ensures the accuracy of measurements and the safety of the system. Environmental conditions such as temperature, humidity and potential mechanical vibrations should be taken into account when choosing measuring transformers. Also, the choice of installation location should be adapted so that the integration into the existing system is as simple as possible with minimal losses. Modern measuring systems enable precise monitoring of parameters and ensure the reliability of the power system. This confirms that the installation of measuring transformers ensures a sustainable and stable power system aligned with the needs of the modern electricity market.