Transformer strips

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The transformer copper strips, or also called foils, have been one of our core products for many years. Sofia Med has been producing ETP copper strip for distribution transformers in accordance with all international standards, and even as per individual customer specifications.

We ensure consistent quality of our products by steadily investing in the latest technologies and great engineers. We are proud to be one of the most competitive European manufacturers at the global market!

Transformer strips Propertiesimage

With our transformer strips (foils) you get:

· clean surface, oil-free

· lab certified mechanical and chemical properties

· rounded burr-free edges from 0.30mm, and <0.30 minimal-burr precision slit edges

· surface inspection system of both sides of the strip

· high dimensional accuracy, exceeding the standards

· high electrical conductivity >100% IACS (in comparison to Al - it is 40% more)

· surface protection against oxidation

· pure Grade A copper material

· paper interleaving

· safe and secure packing for truck or container loading, with additional protection against oxydiation 

 

Dimensions

Thickness in mm  Width in mm Edge shape
0,10 - 0,19 10 - 1000 precision cut
0,20 - 0,29 10 - 1250 precision cut
0,3- - 0,39 200 - 1250 rounded - burr free
0,40 - 2,50 200 - 1250 rounded - burr free

 

Alloys according to EN 1652 standard

SM alloy Symbol Number Cu{%-min) Ρ (%-Range) Ο (%-max)
SM1100 Cu-ETP CW004A 99.90 - 0,040
SM1030 Cu-PHC CW020A 99.95 0,001-0,006 -
SM1031 Cu-HCP CW021A 99.95 0,002-0,007 -
SM1201 Cu-DLP CW023A 99.90 0,005-0,013 -
SM1220 Cu-DHP CW024A 99.90 0,015-0,040 -

 

Transformer strips Characteristicsimage

Physical Properties (at Ambient Temperature of 20 oC)

  CU
Density (gr/cm3) 8,93
Melting Point (L/S* ίπ oC) 1.083

* L/S = Liquid/Solid

 

Typical Mechanical Properties of Cu

Alloy Temper

Tensile Strength

(MPa)

Yield Strength

(MPa)

Elongation

(%)

Hardness

(HV)

Cu R200 200 - 250 100 max - -
R220 220 - 260 140 max 33 -

 

Transformer strips Downloadsimage

INDUSTRIAL APPLICATIONS

  • transformer_170x100_crop_478b24840a

    Transformers

  • transformer-bobbin_170x100_crop_478b24840a

    Transformer bobbins

  • transformer_170x100_crop_478b24840a

    Transformers