Freeze-thaw-stable TSL transformers


Freeze-thaw-stable TSL transformers (climatic category UKhL3) can operate at ambient temperatures from -60 to +40°C, while the TSL standard design version (climatic category U3) is designed for operation at ambient temperatures from -25 to +40°C.

Freeze-resistance is ensured due to the use of a special cast insulation composition and special manufacturing technology. 

“Transformer” freeze-thaw-stable dry-type power transformers have brown windings. The basic specifications, overall dimensions, and connection sizes of the freeze-thaw-stable TSL transformers do not differ from those of the standard design version.

Transformer type

Transformer capacity,
kVA

Rated higher
voltage, kV

Rated low
voltage, kV

Wiring and vector
group

impedance voltage, 
%

Inl, %

NL Losses
, W

SC Losses
, kW*

Weight, kg

TSL 25

25

10

0.4

D/Un-11
U/Un-0

4

4

195

450

280

TSL 40

40

10

0.4

D/Un-11
U/Un-0

4

3

230

780

350

TSL 63

63

10

0.4

D/Un-11
U/Un-0

4

3

300

1,350

450

TSL 100

100

4

3

D/Un-11
U/Un-0

6

1.5

420

2,100

550

TSL 160

160

10

0.4

D/Un-11
U/Un-0

6

1.5

600

2,700

770

TSL 250

250

10

0.4

D/Un-11
U/Un-0

6

1

750

3,700

930

TSL 400

400

10

0.4

D/Un-11
U/Un-0

6

1

1,150

5,900

1,300

TSL 630

630

10

0.4

D/Un-11
U/Un-0

6

0.8

1,300

7,100

1,750

TSL 1000

1,000

10

0.4

D/Un-11
U/Un-0

6

0.8

2,000

8,900

2,500

TSL 1250

1,250

10

0.4

D/Un-11
U/Un-0

6

0.8

2,600

11,400

2,850

TSL 1600

1,600

10

0.4

D/Un-11
U/Un-0

6

0.6

3,300

11,500

3,800

TSL 2000

2,000

10

0.4

D/Un-11
U/Un-0

6

0.6

3,300

15,000

4,050

TSL 2500

2,500

10

0.4

D/Un-11
U/Un-0

6

0.6

4,100

19,500

4,900

TSL 3150

3200

10

0.4

D/Un-11
U/Un-0

6

0.6

4,600

24,000

5,600

We offer reliable and long-lasting freeze-thaw-stable dry-type cast resin power transformers. Those are standard TSL transformers manufactures in the climatic category UKhL3 design version. 
These freeze-thaw-stable TSL transformers rated for 25-3200 kVA are always in stock. Rated HV — 4-10 kV; rated LV – 400 V.

Design features of freeze-thaw-stable TSL transformers

The transformer winding is brown. In terms of operational characteristics, the freeze-thaw-stable TSL transformers are no different from standard TSL transformers manufactured in the climatic category U3 design version. The same applies to the dimensions and connections. 
The cast resin TSL transformers have an important advantage, they are completely protected against fire, since the compound made of epoxy resins is fire-retardant, smolder-resistant, and does not release toxic substances even when heated to high temperatures (complete environmental friendliness is guaranteed). 
For this reason, these units for converting high-voltage electrical energy into currents suitable for domestic use can operate in offices and even residential buildings. It is TSL transformers that are used at chemical, metallurgical and nuclear facilities.

Operating conditions of freeze-thaw-stable TSL transformers

Freeze-thaw-stable TSL transformers manufactured in climatic category KhL3 design version can operate at ambient temperatures from -60 to +40 °C. For comparison, the minimum operating temperature for TSL transformers is -25 °C. This advantage is possible due to the use of cast epoxy insulation and step-lap core manufacturing technology.

Main advantages of freeze-thaw-stable TSL transformers

  • Can be installed in built-in substations.
  • Protected against fire — self-extinguishing and fire-retardant epoxy resin insulation.
  • Environmental safety — releases no harmful or toxic substances when heated.
  • Low noise level (compared to other design versions).
  • Resistant to moisture, dust, or mold formation.
  • Low operating costs.