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According to IEC 60641 – 1 Type B 4.1

Made of transformerboard

Molded insulation components which are produced in a Wet molding process are used in high Voltage windings to complete the insulation system. These components are manufactured According to customer drawings in various shapes and sizes.

Lead exits are special insulation systems used in large power transformers high voltage side to lead conductors through tank walls from the windings to the bushing in high safety factors. Lead exit design is based on an electrode as a metal core insulated by high quality formed transformer board with several numbers of barriers. The number of barriers depends on maximum field stress in the oil gaps and it is designed with consideration of maximum safety factors.

Made of Transformerboard

Snout & Chimney Sectors are required in high voltage windings to insulate the terminal leads (Center of top). The snouts and chimneys, which can be produced in any shapes or sizes, are combined without difficulty with angle rings and caps, with an optimized, scarfed overlap.

Made of transformerboard

According to IEC 60641 – 1 Type B 4.1

The use of angle rings and caps of TRANSFORMERBOARD relieves the electrical stress on adjacent oil channels and increases the partial discharge inception voltage. They are dimensionally stable and thus can be quickly and safely installed as a 360° component. The radii can be chosen so that they correspond as closely as possible to the electric field pattern.

Made of

Frame: Transformerboard according to IEC 60641 – 1 Type B 3.1

Metallization :                Cupper Strip

Insulation :                    Crepe Paper

Metallized shield rings with a pressboard core are insulated with crepe paper wrapped in several layers after being covered with a special meta bandage.

According to IEC 60641 – 1 Type B 3.1

These insulation assemblied made of sheets of insulation material, with spacers to channel the oil flow and as dielectric barriers at the ends of windings in axial long oil gaps. They also contribute in clamping of the winding by clampingrings.

According to IEC 60641-1 Type B 3.1

Rectangular strips are fitted in axial oil channels as spacers for the cylinders. Special strips are used between supporting cylinders and windings, which act as spacers between cylinder and winding (for cooling of winding) and make the radial spacers mechanically fixed.

Since the strips are exposed to strong electric fields, a tissue free surface and specific rounded edges strips are of great importance to maintain dielectric strength of the overall arrangement.

Spacers made of high density boards with high short- circuit strength are used in windings. They can be supplied in final milled states. Milled spacers and strips with rounded edges prevent damages to the wire insulation. In contrast to punched spacers, milled spacers release substantially less cellulose fiber to the oil, witch has a positive effect on the dielectric strength of the coolant.

According to IEC 60641 – 1 Type B 3.1

Due to its high mechanical strength, it is possibleto use cylinders directly on the winding mandrel as supporting cylinders for coils,even for limited-rating transformers. These cylinders can be impregnated completly without difficulty. The danger of air or water insulations, cannot be avoided with hard paper cylinders.

Although cylinders of TRANSFORMERBOARD behave similarly to soft paper insulation with regard to dielectric properties, they are dimensionally stable and can be loaded without mechanical problems.

According to IEC 61061

Clamping rings of transformerwood are designed to withstand high axial forces generated in the windings during short circuit.

Good dielectric properties also lead to reduced design clearances and less chance of partial discharge at the end of the winding assembly.

Numerous design shapes and configurations are offered.

Made of

Transformerboard

      According to IEC 60641 – 1 Type B 3.1

Glued to transformer

Presspaper

      According to IEC 60641 – 1 type 2.1

In many cases, Clackband, Thermo-Flow or ladders enable a particularly efficient winding construction. These can be quickly supplied in all required dimensions.