icona trasformatori cobral

Electric transformers


Semi-finished aluminum and copper alloys for high conductivity

Cobral supplies semi-finished non-ferrous metals ideal for the production of electrical transformers obtained from raw materials with a high conductivity value since the origin. Cobral enjoys the UNI EN ISO 9001: 2008 Quality Management System Certification and operates only alumina and copper supplied in accordance with the UNI EN standards: UNI EN 485/2 485/3 485/4 UNI EN 573-3 UNI EN 14121 e UNI EN 13599

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The strips are the most demanding aluminum semi-finished products in the transformer industry

The high conductivity due to the purity of the raw material makes them particularly appreciated and ideal for this type of processing: in fact, Cobral-processed aluminum has a purity from 99.5% to 99.7%. To complete the quality of these aluminum laminates with a guarantee of more than 34.5 MS / m for material with physical status H0, are the production of un-flashed coils, narrow width tolerances, coiled cylindrical cardboard, with the possibility of adding the interlayers paper.

Care for small orders
The Cobral supply of aluminum and copper strips is also guaranteed for small orders, in full compliance with the lead time and requirements of each customer.

Variable widths and thicknesses
According to the customer specifications, the product is a commitment that the company carry out every day: Aluminum strips can have different widths, with a range from 8 mm to 1500 mm and thicknesses varying from 0.20 mm to 4 mm.

Customized diameters
Availability of internal ribbon diameters is 300/400/500 mm, while the outer one is available on request, as well as delivery on euro pallets.
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Copper strips for electrical transformer

Quality, speed and product customization

Copper strips are Cobral’s response to the electrical transformer market

By processing a raw material with a purity of 99.98%, copper strips have high electrical conductivity. The quality of these semi-finished copper with warranty 58 MS / m, is also given by a longitudinal cut without burrs and with narrow width tolerances, by a winding with turns aligned on cardboard core and paper interlayer. As with aluminum strips, also for copper ribbons Cobral offers its clients a customized service, starting with the physical state of the metal: physical state R220 – R240 on cooked material. Thickness ranges from 0.20 mm to 3 mm and width from 8 mm to 1500 mm.

The coil is supplied with 3 sizes internal diameters: 300/400/500 mm and the outer one on request.
Also in the case of small quantities, Cobral guarantees quality, speed and product customization, from the physical characteristics from the metal to the packaging.

Metal service Metal and processing