In section Products you can find information about range of products manufactured by the plant. In case you have any questions to the plant’s employees, or you would like to place an order, kindly complete the form at the foot of the page and specify the product you are particularly interested in. Kindly note that minimum performance specifications are presented in the section. In case you need more detailed engineering and reference information kindly refer to section “Documents”.

Current transformers SF6

Current transformers SF6 are meant for measurement data signal transmission to measuring, protection and control devices in alternating current installations with frequency of 50 Hz or 60 Hz.

Instrument current transformers can be manufactured SF6-filled, with silicon external insulation.

Current transformers SF6 series ТОГ

Current transformers SF6 series TOG

Application

Instrument current transformers with SF6 insulation ТОГ are designed for alternating current electrical nets frequency 50 or 60Hz in order to transmit measurement data signal to measuring, protection, automation, alarm and control devices in alternating current electrical nets with frequency of 50 Hz or 60 Hz.

The transformers are SF6-filled and are equipped with pressure control unit and warning device. If required by a customer, SF6 density transmitter with top and bottom level alarm can be additionally installed.

Design

Transformer design provides for protecting units that prevents from gauge pressure increase higher then 7 atmg inside the transformer. Gas emission through the protecting device is upwards directed, out of the maintenance staff area.

Transformers are external mechanical impact resistant in accordance with GOST 17516.1 and endure seismic vibrations up to 8 scores.

Transformers completely replace oil-filled transformers in strict observance of all specifications and coupling sizes.

Specifications

In addition to the below-mentioned technical characteristics, the transformers can be customized:

  • with different quantity of secondary windings;
  • accuracy rating is 0,2; 0,2S; 0,5; 0,5S; 1; 5P; 10P;
  • with secondary windings’ modified power rating in accordance with DSTU GOST 7746-2003 for current transformers and DSTU GOST 1983-2003 for voltage transformers in case accuracy rating is observed.

Current transformers can be manufactured in two current versions with external changeover using jumper straps, and the third version on the low voltage side in the secondary lads’ box making tips on the measuring winding.

Voltage transformers have one or two main secondary winding which provides for the highest accuracy rating in case of simultaneous turn-on.

Maintenance

Transformers show stable insulation behavior within the whole service lifetime and do not require medium and major repairs with insulation drying or replacement.

Transformers are explosion- and fireproof: metal structures are not destroyed and there is no short-circuit fire.

SF6 pressure control is carried out visually using control units and using the access to the control panel with upper level alarm, rated pressure and SF6 pressure lower level.

Documents and warranties

Transformers meet the requirements of DSTU GOST 7746-2003 for the current transformers and DSTU GOST 1983-2003 for voltage transformers, specifications and working drawings.

Provided a customer strictly observes the terms of transportation, storage, installation and operation, the company undertakes to replace or repair faulty transformer free of charge within the warranty period, considering the requirements of the operations’ manual.

Transformers comply with the following criteria:

  1. Average service lifetime is 30 years;
  2. Assured Shelf life is 1 year;
  3. warranty use period:
    • from the time of commissioning - 3 years;
    • from the date of shipment from the manufacturer’s site - not more than 3,5 years.
Item Rated primary current, А Rated secondary current, А Number of secondary windings Short-time thermal current, kA Short-time electrodynamic current, kA Order products Quantity, pcs.
for protection for measurement
ТОГ 123-II-II У1 300-600; 400-800; 500-1000; 600-1200; 750-1500; 1000-2000; 1 or 5 3 or 4 1 or 2 30 – 60; 100 – 200;
1500-300035 - 70120 - 240
ТОГ 123-II-IV У1 50; 75; 100; 150; 200 1 or 5 3 or 4 1 or 2 3; 4; 6; 8; 10 10; 15; 20; 30; 40
ТОГ 170-II-I У1 300-600; 600-1200; 1000-2000 1 or 5 3 or 4 1 or 2 18,5 – 37 60 - 120
ТОГ 245-II-I У1 300-600; 400-800; 500-1000; 600-1200; 1000-2000; 1500-3000 1 or 5 3 or 4 1 or 2 31,5 – 63 80,5 - 161
ТОГ 362-II-I У1 1000-2000; 1500-3000; 2000-4000 1 4 or 5 1 or 2 31,5 - 63 80,5 - 161
ТОГ 362-II-II У1 1000-2000; 1500-3000; 2000-4000 1 4 or 5 1 or 2 31,5 - 63 80,5 - 161
ТОГ 525-II-I У1 1000-2000; 1500-3000; 2000-4000 1 4 or 5 1 or 2 31,5 - 63 80,5 - 161
ТОГ 525-II-II У1 1000-2000; 1500-3000; 2000-4000 1 4 or 5 1 or 2 31,5 - 63 80,5 - 161
ТОГ 765-II-I У1 1000-2000; 2000-4000; 1500-3000 1 4 or 5 1 or 2 84 214
ТОГ 765-II-II У1 1000-2000 1 4 or 5 1 or 2 84 214

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