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Our Product Range

Precision-machined electrical-grade insulating pressboard components for transformers.

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Our Products

Transformer Insulation Component Range

All components manufactured from electrical-grade insulating pressboard with strict dimensional accuracy, surface finish, and insulation integrity checks.

Pressboard Components

Cylinders Pressboard Components
Cylinders

Sleeves wrapped around the core and between winding layers for primary electrical isolatio...

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Spacers Pressboard Components
Spacers

Machined parts that separate winding layers to create cooling oil ducts.

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Strips Pressboard Components
Strips

Plain, dovetail or trapezoidal profiles used between winding layers.

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End Strips Pressboard Components
End Strips

Edge-profile strips used at winding terminations.

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Rings Pressboard Components
Rings

Placed at the top and bottom of winding coils to provide uniform mechanical clamping.

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Blocks Pressboard Components
Blocks

Packing and support blocks secured against clamps and frames to handle axial forces.

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Phase Barriers Pressboard Components
Phase Barriers

Insulation barriers separating phases within the transformer winding.

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Angle Washers Pressboard Components
Angle Washers

Pre-formed segments that fit contours at the ends of windings for optimal electric field m...

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Custom Machined Components Pressboard Components
Custom Machined Components

Custom pressboard components machined as per customer drawings.

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Pressboard Components Specifications

A. Pressboard Components

Cylinders – Sleeves wrapped around the core and between winding layers for primary electrical isolation.
Spacers – Machined parts that separate winding layers to create cooling oil ducts.
Strips – Plain, dovetail or trapezoidal profiles used between winding layers.
End Strips – Edge-profile strips used at winding terminations.
Rings – Placed at the top and bottom of winding coils to provide uniform mechanical clamping.
Blocks – Packing and support blocks secured against clamps and frames to handle axial forces.
Phase Barriers – Insulation barriers separating phases within the transformer winding.
Angle Washers – Pre-formed segments that fit contours at the ends of windings for optimal electric field management.
Custom Machined Components – Custom pressboard components machined as per customer drawings.

Technical Reference

Typical Dimensional Range

Indicative specification ranges — exact tolerances confirmed per drawing at order stage.

ComponentMaterialThickness / Size RangeStandard
Pressboard Components Pressboard Components 1mm – 50mm IEC 60641-3-1

Paper Products

Kraft / Press Paper Paper Products
Kraft / Press Paper

High-purity wood pulp used for direct turn-to-turn and layer-to-layer conductor wrapping i...

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Crepe Paper Paper Products
Crepe Paper

Wrinkled, highly flexible paper designed to wrap curved or irregular surfaces without tear...

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Crepe Tubes Paper Products
Crepe Tubes

Engineered to insulate lead-out wires, terminal connections, and busbars, offering dielect...

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Diamond Dotted Paper (DDP) Paper Products
Diamond Dotted Paper (DDP)

Dotted adhesive paper used for bonding conductor layers.

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Thermally Upgraded Paper Paper Products
Thermally Upgraded Paper

Available on request for higher thermal-class applications.

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Nomex Paper Paper Products
Nomex Paper

Available on request for high-temperature insulation applications.

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Paper Products Specifications

B. Paper Products

Kraft / Press Paper – High-purity wood pulp used for direct turn-to-turn and layer-to-layer conductor wrapping in oil-immersed transformers.
Crepe Paper – Wrinkled, highly flexible paper designed to wrap curved or irregular surfaces without tearing during expansion and contraction.
Crepe Tubes – Engineered to insulate lead-out wires, terminal connections, and busbars, offering dielectric strength and flexibility.
Diamond Dotted Paper (DDP) – Dotted adhesive paper used for bonding conductor layers.
Thermally Upgraded Paper – Available on request for higher thermal-class applications.
Nomex Paper – Available on request for high-temperature insulation applications.

Technical Reference

Typical Dimensional Range

Indicative specification ranges — exact tolerances confirmed per drawing at order stage.

ComponentMaterialThickness / Size RangeStandard
Paper Products Paper Products 0.05mm – 0.50mm -

Densified Wood Components

Rings Densified Wood Components
Rings

Provide uniform downward compression to transformer windings to prevent axial movement und...

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Blocks Densified Wood Components
Blocks

Positioned at the top and bottom of coils to absorb mechanical stress and support the wind...

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Edge Strips Densified Wood Components
Edge Strips

Structural edge-support strips used within the winding assembly.

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Cleats Densified Wood Components
Cleats

Support fittings used for securing internal transformer components.

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Custom Machined Components Densified Wood Components
Custom Machined Components

Custom densified wood components machined as per customer drawings.

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Densified Wood Components Specifications

C. Densified Wood Components

Rings – Provide uniform downward compression to transformer windings to prevent axial movement under short-circuit conditions.
Blocks – Positioned at the top and bottom of coils to absorb mechanical stress and support the winding structure.
Edge Strips – Structural edge-support strips used within the winding assembly.
Cleats – Support fittings used for securing internal transformer components.
Custom Machined Components – Custom densified wood components machined as per customer drawings.

Technical Reference

Typical Dimensional Range

Indicative specification ranges — exact tolerances confirmed per drawing at order stage.

ComponentMaterialThickness / Size RangeStandard
Densified Wood Components Densified Wood Components 10mm – 100mm -

FRP Components

Threaded Rods FRP Components
Threaded Rods

High-tensile, non-conductive rods used to clamp and secure the transformer core.

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Nuts FRP Components
Nuts

FRP fasteners used in place of metal to ensure complete dielectric isolation.

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Fasteners FRP Components
Fasteners

General FRP fastening components for dielectric-isolated assembly.

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Cylinders / Tubes FRP Components
Cylinders / Tubes

FRP tubes insulate copper conductors and surround tie-rods to provide core-to-winding and...

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Phase Barriers FRP Components
Phase Barriers

Insulation barriers separating phases, built in FRP for added mechanical strength.

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Blocks FRP Components
Blocks

Structural FRP blocks used for spacing and support.

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Custom FRP Components FRP Components
Custom FRP Components

Custom FRP components machined/moulded as per customer drawings.

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FRP Components Specifications

D. FRP Components

Threaded Rods – High-tensile, non-conductive rods used to clamp and secure the transformer core.
Nuts – FRP fasteners used in place of metal to ensure complete dielectric isolation.
Fasteners – General FRP fastening components for dielectric-isolated assembly.
Cylinders / Tubes – FRP tubes insulate copper conductors and surround tie-rods to provide core-to-winding and phase-to-phase insulation.
Phase Barriers – Insulation barriers separating phases, built in FRP for added mechanical strength.
Blocks – Structural FRP blocks used for spacing and support.
Custom FRP Components – Custom FRP components machined/moulded as per customer drawings.

Technical Reference

Typical Dimensional Range

Indicative specification ranges — exact tolerances confirmed per drawing at order stage.

ComponentMaterialThickness / Size RangeStandard
FRP Components FRP Components As per drawing IEC 60076
FAQs

Common Questions

Yes. Share your drawings and specifications and we manufacture components to your exact dimensions and tolerances.

MOQ varies by component type and size. Share your requirement on our enquiry form and we'll confirm the best quantity and pricing for your order.

Standard components typically ship within 1–2 weeks. Custom/large orders depend on quantity and specification — we confirm exact timelines at enquiry stage.

We exclusively use Hitachi Energy India Insulation Pressboard (formerly ABB / Raman Board) for dimensional stability and reliable insulation performance.

Yes, we supply across India from our Bengaluru and Hyderabad units, and have fulfilled export enquiries on request.

Need custom components as per your drawings and specifications?

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