Custom Electrical Pressboard Parts & Transformer Insulation Components Paperboard
We specialize in the precision engineering and fabrication of Electrical Pressboard Components and Parts designed for oil-immersed power transformers and distribution transformers. Utilizing 100% premium unbleached sulfate wood pulp pre-compressed paperboard, our components deliver exceptional dielectric stability, high mechanical rigidity, and low compressibility.
Equipped with advanced CNC machining, milling, and molding capabilities, we convert raw electrical insulation board into highly precise, ready-to-install insulation kits tailored to your exact transformer design and electrical clearances.
We fabricate a diverse range of standard and custom-shaped insulation parts:
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Insulation Cylinders: High-strength barriers providing primary core-to-winding and winding-to-winding phase insulation.
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Collars with Spacers & Winding End Rings: Heavy-duty structural rings positioned at the coil ends to withstand axial short-circuit electro-dynamic forces.
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Oil Ducts & Strips: Precision-cut axial and radial spacing strips that maintain consistent cooling channels for transformer oil.
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Swallow-tail & Dove-tail Spacers: Interlocking geometric spacers designed to secure vertical oil paths without shifting during operation.
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Corrugated Paperboard: Flexible, high-surface-area insulation ideal for cooling duct systems and flexible barrier configurations.
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Angle Rings & Cap Seals: Molded or machined insulation profiles configured to isolate high-voltage lead exits and coil end segments.
| Parameter / Capability | Specification Profile |
| Base Material Type | 100% Unbleached Sulfate Wood Pulp Pressboard (PSP) |
| Material Thickness Range | 1-10mm (Layered thicker configurations available) |
| Density Compatibility | 1.0-1.3g/cm3 |
| Machining Capabilities | CNC Routing, Milling, Punching, Die-cutting, Forming, and Assembly |
| Drawing Formats Accepted | .dwg, .dxf, .step, PDF |
| Application Standards | Fully compliant with IEC 60641-3 requirements |
Core Application Benefits
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Optimized Field Distribution: Eliminates electrical stress concentrations in high-voltage and low-voltage winding gaps.
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Enhanced Thermal Management: Precise dimensions of swallow-tail/dove-tail spacers and corrugated boards ensure uncompromised oil circulation.
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High Short-Circuit Resistance: Low-compression material profiles ensure the transformer clamping mechanism remains tightly secured over decades of thermal cycling.