Instrument transformers

Instrument transformers

General description
Technical information

General description

Electroshield Samara produces a full range of instrument current and voltage transformers for indoor and outdoor installation.

During the production, the major focus is put on the quality of the components. They are subject to thorough incoming inspection before production start-up.

The professionalism of personnel and well-established design and production process make it possible to manufacture transformers by individual specifications in the shortest possible time.

Scope of application

  • Industrial enterprises.
  • Switchgear and control gear manufacturers, installation organizations.
  • Transportation organizations.
  • Companies working in the field of oil and gas extraction, electric-power industry.

The company constantly improves the products, expands the range of current transformers. Our new product is – a series of small-size current transformers TOL-SESH-10. Instrument transformers can be manufactured with insulation level "a" or "b" in accordance with GOST 1516.3-96.

Transformers of outdoor installation can operate at the environmental pollution rate (PR) of 4PR as specified by "Electrical Installations Code" for transformers with the category of creepage distance IV under GOST 9920-89.


Equipment certification:

  • Instrument transformers are provided with declaration of conformity.
  • Transformers have certificates of conformance with technical requirements of Rosseti, PJSC.

Technical information


Current transformers


Product type TOL-SESH TOL-SESH TOL-SESH TOL-SESH TOL-SESH TOL-SESH TOL-SESH
Brief Description support-type; metal foundation frame; indoor support-type; rated primary current up to 2000A; indoor support-type; rated primary current up to 3000A support-type; small size; indoor support-type; indoor support-type; indoor support-type; outdoor
Rated voltage 10 10 10 10 10 10 10
Design variants 01; 02; 03; 04; 05; 06; 07; 08; 09 11; 12; 13; 14; 21; 22; 23; 24; 31; 32; 33; 34; 51; 52; 53; 54; 61; 62; 63; 64; 71; 72; 73; 74; 81; 82; 83; 84 11-1; 12-1; 13-1; 14-1; 21-1; 22-1; 23-1; 24-1; 31-1; 32-1; 33-1; 34-1; 51-1; 52-1; 53-1; 54-1; 61-1; 62-1; 63-1; 64-1; 71-1; 72-1; 73-1; 74-1; 81-1; 82-1; 83-1; 84-1 11М; 21М; 31М; 41М 101; 102; 103; 104 201-11, 201-21, 201-31, 201-41; 201-12, 201-22, 201-32, 201-42; 201-13, 201-23, 201-33, 201-43; 201-14, 201-24, 201-34, 201-44 01; 02; 03
Secondary lead with flexible cables available No Yes Yes Yes No Yes No
Rated metering precision class 0,2; 0,2S; 0,5; 0,5S; 1; 3; 5; 10 0,2; 0,2S; 0,5; 0,5S; 1; 3; 5; 10 0,2; 0,2S; 0,5; 0,5S; 1; 3; 5; 10 0,2; 0,2S; 0,5; 0,5S; 1; 3; 5; 10 0,2; 0,2S; 0,5; 0,5S; 1; 3; 5; 10 0,2; 0,2S; 0,5; 0,5S; 1; 3; 5; 10 0,2; 0,2S; 0,5; 0,5S; 1; 3; 5; 10
Rated protection precision 5P; 10P 5P; 10P 5P; 10P 5P; 10P 5P; 10P 5P; 10P 5P; 10P
Sec. winding rated load at cosȹ=1, VA 1; 2; 2,5 1; 2; 2,5 1; 2; 2,5 1; 2; 2,5 1; 2; 2,5 1; 2; 2,5 1; 2; 2,5
Sec. winding rated load at cosȹ=0,8, VA 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60
Rated primary current, A 5-2 000 5-2 000 5-3 000 5-2 000 5-2 500 5-2 000 5-2 000
Rated secondary current, A 1; 5 1; 5 1; 5 1; 5 1; 5 1; 5 1; 5
Qty. of secondary windings Up to 5 Up to 4 Up to 5 Up to 2 Up to 4 Up to 4 Up to 3
Rated safety factor of sec. winding for metering 2-35 2-35 2-35 2-35 2-35 2-35 2-35
Rated safety factor of sec. winding for protection 2-35 2-35 2-35 2-35 2-35 2-35 2-35
Climatic a placement category U2; UHL2; T2 U2; UHL2; T2 U2; UHL2; T2 U2; UHL2; T2 U2; UHL2; T2 U2; UHL2; T2 UHL1; T1
Product type TOL-SESH TOL-SESH TOL-SESH TOL-SESH TOL-SESH TOL-SESH
Brief Description support-type; metal foundation frame; indoor support-type; indoor support-type; indoor support-type; plug-in primary contact; indoor support-type; round; indoor support-type; elliptic; outdoor
Rated voltage 20 20 35 35 35 35
Design variants 01; 02; 03; 04; 05; 06; 07; 08; 09; 31; 32; 33; 34; 35; 36; 37; 38; 39; 11; 12; 13; 14; 15; 16; 17; 18; 19; 21; 22; 23; 24; 25; 26; 27; 28; 29 01; 02;03; 04; 05; 06; 07; 08; 09 101; 102; 103; 104; 105; 106 01; 02; 03 04; 05; 06; 14; 15; 16
Secondary lead with flexible cables available No Yes No Yes No No
Rated metering precision class 0,2; 0,2S; 0,5; 0,5S; 1; 3; 5; 10 0,2; 0,2S; 0,5; 0,5S; 1; 3; 5; 10 0,2; 0,2S; 0,5; 0,5S; 1; 3; 5; 10 0,2; 0,2S; 0,5; 0,5S; 1; 3; 5; 10 0,2; 0,2S; 0,5; 0,5S; 1; 3; 5; 10 0,2; 0,2S; 0,5; 0,5S; 1; 3; 5; 10
Rated protection precision 5P; 10P 5P; 10P 5P; 10P 5P; 10P 5P; 10P 5P; 10P
Sec. winding rated load at cosȹ=1, VA 1; 2; 2,5 1; 2; 2,5 1; 2; 2,5 1; 2; 2,5 1; 2; 2,5 1; 2; 2,5
Sec. winding rated load at cosȹ=0,8, VA 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 
Rated primary current, A 5-2 500 5-2 500 5-2 500 5-2 500 5-1 200 5-1 200
Rated secondary current, A 1; 5 1; 5 1; 5 1; 5 1; 5 1; 5
Qty. of secondary windings Up to 5 Up to 4 Up to 5 Up to 4 Up to 4 Up to 6
Rated safety factor of sec. winding for metering 2-35 2-35 2-35 2-35 2-35 2-35
Rated safety factor of sec. winding for protection 2-35 2-35 2-35 2-35 2-35 2-35
Climatic a placement category U2; UHL2; T2 U2; UHL2; T2 U2; UHL2; T2 U2; UHL2; T2 UHL1; T1 UHL1; T1
Product type TSHL-SESH TSHL-SESH TSHL-SESH TSHL-SESH TPL-SESH TPL-SESH
Brief Description Busbar-type; indoor Busbar-type; indoor Busbar-type; indoor Busbar-type; indoor bushing-type; rated primary current 20-300 A bushing-type; rated primary current 300-2000 A
Rated voltage 0,66 0,66 10 20 10 10
Design variants 01; 02; 03; 04 11; 12; 13; 14; 15; 16 01; 02; 03; 04; 05 01; 02; 03; 04 01; 02; 21; 22 11; 12; 31; 32
Secondary lead with flexible cables available No No Yes No No No
Rated metering precision class 0,2; 0,2S; 0,5; 0,5S; 1 0,2; 0,2S; 0,5; 0,5S; 1 0,2; 0,2S; 0,5; 0,5S 0,2; 0,2S; 0,5; 0,5S 0,2; 0,2S; 0,5; 0,5S 0,2; 0,2S; 0,5; 0,5S
Rated protection precision 5P; 10P 5P; 10P 5P; 10P 5P; 10P 5P; 10P 5P; 10P
Sec. winding rated load at cosȹ=1, VA 1; 2; 2,5 1; 2; 2,5 1; 2; 2,5 - 1; 2; 2,5 1; 2; 2,5
Sec. winding rated load at cosȹ=0,8, VA 3; 5; 7,5; 10; 15; 20 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 30; 50; 60; 75; 100 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60
Rated primary current, A 150-5 000 300-5 000 1 000-6 000 3 000-8 000 20-300 300-2 000
Rated secondary current, A 1; 5 1; 5 1; 5 1; 5 1; 5 1; 5
Qty. of secondary windings 1 1 up to 5 up to 4 up to 4 up to 4
Rated safety factor of sec. winding for metering 5-18 5-18 2-35 15-30 2-35 2-35
Rated safety factor of sec. winding for protection 5, 10, 15 5, 10, 15 2-35 15-30 2-35 2-35
Climatic a placement category U2; T2 U2; T2 U2; T2 U2; T2 U2; T2 U2; T2
Наименование TPL-SESH TPL-SESH TPL-SESH TV-SESH TV-SESH
Brief Description bushing-type transformer rated primary current 20-300A; opportunity to manufacture secondary terminals with flexible wires; internal installation bushing-type transformer rated primary current 300-2000A; opportunity to manufacture secondary terminals with flexible wires; internal installation bushing-type Integrated Integrated
Rated voltage 10 10 10 10; 20; 35 10; 20; 35
Design variants 41; 42; 43; 61; 62; 63 51; 52; 71; 72 81 - -
Secondary lead with flexible cables available Yes Yes No Yes No
Rated metering precision class 0,2; 0,2S; 0,5; 0,5S 0,2; 0,2S; 0,5; 0,5S 0,2; 0,2S; 0,5; 0,5S 0,2; 0,2S; 0,5; 0,5S 0,2; 0,2S; 0,5; 0,5S; 1; 3; 10
Rated protection precision 5P; 10P 5P; 10P 5P; 10P 5P; 10P 5P; 10P
Sec. winding rated load at cosȹ=1, VA 1; 2; 2,5 1; 2; 2,5 1; 2; 2,5 1; 2; 2,5 1; 2; 2,5
Sec. winding rated load at cosȹ=0,8, VA 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60 3; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60
Rated primary current, A 20-300 300-2 000 5-2 000 50-6 000 50-5 000
Rated secondary current, A 1; 5 1; 5 1; 5 1; 5 1; 5
Qty. of secondary windings up to 4 up to 4 up to 4 1 1
Rated safety factor of sec. winding for metering 2-35 2-35 2-35 3-25 3-50
Rated safety factor of sec. winding for protection 2-35 2-35 2-35 3-50 3-50
Climatic a placement category U2; T2 U2; T2 U2; T2 O4 UHL1; T1

Voltage transformers

Product type NOL-SESH 6,10,20,35 kV ZNOL-SESH 6,10,15,20,35 kV
Brief Description supporting internal or external installation supporting internal or external installation
Rated voltage 6, 10, 20, 35 6, 10, 15, 20, 35
Rated voltage of primary winding, kV 6/√3 ...35/√3 6/√3 ...35/√3
Rated voltage of primary secondary windings, V 100/√3 100/√3
Nominal voltage of additional secondary winding, V 100/3, 100 100/3, 100
Classes of accuracy of primary secondary winding 0,2; 0,5; 1,0; 3,0 0,2; 0,5; 1,0; 3,0
Classes of acuracy of additional secondary winding 3, 3Р, 6Р 3, 3Р, 6Р
Climatic and placement category U2; UHL2; T2; UHL1; T1 U2; UHL2; T2; UHL1; T1
Product type 3хZNOL-SESH 6, 10 kV NALI-SESH 6, 10, 35 kV
Brief Description Three-phase internal installation group Three-phase group, indoor or outdoor
Rated voltage 6, 10 6, 10, 35
Rated linear secondary voltage, V 100 100
Nominal voltage of additional secondary winding, V 0,2; 0,5; 1,0; 3,0 0,2; 0,5; 1,0; 3,0
Accuracy class of additional secondary winding 3, 3Р, 6Р 3, 3Р, 6Р
Classes of accuracy of primary secondary winding U2; UHL2; T2 U2; UHL2; T2; UHL2; T2
Accuracy class of additional secondary winding 3, 3Р, 6Р 3, 3Р, 6Р
Climatic and placement category U2; UHL2; T2; UHL2; T2 U2; UHL2; T2; UHL2; T2

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443048, Самарская область, г.о. Самара, вн. р-н Красноглинский, п. Красная Глинка, кв-л 2, зд.37, офис 221
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