Three-phase oil transformers of hermetic design without oil conservators are designed to convert electricity in the networks of power systems and electricity consumers.

This series of transformers was developed in accordance with the standards of PJSC “ROSSETI” STO 34.01-3.2-011-2017 “Power distribution transformers 6-10 kV with a capacity of 63-2500 kV · A. Requirements for the level of losses of idling and short circuit”. The level of no-load and off-load losses in this series of transformers corresponds to the energy efficiency class X2K2.