The instrument allows measuring the following parameters for the transformers of all the circuits and groups of connections according to GOST 30830 - Transformation rate; - No-load operation loss at the low voltage; - Short circuit impedance; - Voltage and current - Power factor; - Measured current (voltage) frequency; - Phase displacement angle between the voltage and current. - Effective (root-mean-square) voltage. It is manufactured in two hardware versions: - Standard (operating temperature range: from 5 °C to 40 °C); - North (operating temperature range: from minus 15 °C to 55 °C).