OLTC voltage regulators serve to maintain the required voltage at the terminals of the secondary winding of a transformer with an on-load tap-changer in automatic mode. In addition, the functionality of the REGSys ™ automatic voltage regulator range can be significantly extended with additional features. Key features and benefits: Large graphic LCD display, which displays all the necessary information: the position of the on-load tap-changer, voltage and other indicators. Measured values: U, I, P, Q, S, cosφ, sinφ, f. Multi-channel parameter recording function in the log. Accounting and statistics functions: total number of switchings, number of switchings by positions. Additional functions for monitoring the hottest point and lifetime. Freely programmable binary inputs and outputs. Direct Pt100 input. Voltage control of three-winding, phase-shifting transformers and transformer groups. Support for communication protocols IEC 60870-5-101 / 103/104; IEC 61850; LON; DNP 3.0; Profi bus DP; MODBUS RTU; SPABUS. Monitoring of transformers in accordance with IEC 60354/60076. Possibility of programming the device for specific customer requirements. All SCADA system capabilities (including IEC 61580) .

Three-phase oil transformers of hermetic design without oil conservators are designed to convert electricity in the networks of power systems and electricity consumers. The level of no-load and short-circuit losses in this series of transformers corresponds to the CENELEC recommendations. Input of the neutral side of the low voltage transformer is designed for continuous load current equal to 100% of the nominal current of the low voltage winding.

Three-phase oil transformers of hermetic design without oil conservators are designed to convert electricity in the networks of power systems and electricity consumers. The level of no-load and short-circuit losses in this series of transformers corresponds to the CENELEC recommendations. Input of the neutral side of the low voltage transformer is designed for continuous load current equal to 100% of the nominal current of the low voltage winding.

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.

Three-phase oil transformers of hermetic design without oil conservators are designed to convert electricity in the networks of power systems and electricity consumers. The level of no-load and short-circuit losses in this series of transformers corresponds to the CENELEC recommendations. Input of the neutral side of the low voltage transformer is designed for continuous load current equal to 100% of the nominal current of the low voltage winding. These transformers are made in accordance with IEC requirements for no-load and off-load losses - EcoDesign.

Three-phase oil transformers of hermetic design without oil conservators are designed to convert electricity in the networks of power systems and consumers. The input of the neutral side of the low voltage transformer is designed for a continuous current load equal to 100% of the nominal current of the low voltage winding.

Transformers TMG 21 are three-phase oil transformers. Transformers are manufactured with a combination of 6 / 0.4 kV, 6.3 / 0.4 kV, 10 / 0.4 kV, 10.5 / 0.4 kV, 35 / 0.4 voltages with diagrams and winding connection groups D / Yn-11 and Y / Yn-0. The low voltage winding of transformers of this series is made not of aluminum wires, but of aluminum foil, which combines ease of winding with a high level of reliability. The width of aluminum tape is equal to the height of the low voltage winding - this significantly reduces the axial dynamic forces in transformer. DDP paper was used as an interlayer insulation, which is sintered during the drying process of the windings. In this way, a dense, holistic design is created, with increased resistance to radial forces.

Three-phase oil immersed transformers with output from 6,3 to 450 MVA, nominal voltage up to 525 kV. Transformers by individual customer request with different type of the winding and special dimensions.

One-phase oil transformers with total output of a three-phase set up to 1200 MVA and voltage up to 525 kV. Transformers can be build according to individual customer request with different type of winding, cooling and specific dimensions.

Autotransformers are specific by having two coils, while one has dual use. Autotransformers are smaller, lighter and having lower losses. ETD offers autotransformers with output up to 450 MVA and voltage 525 kV.