The core of the Electrical Insulation Crepe Paper Tube is flexible and folding resistant, with strong oil immersed insulation, good heat dissipation, high temperature resistance, chemical stability, and easy installation. It is specially designed for the insulation of high voltage leads, tap changers, and windings of oil immersed transformers/reactors.
High breakdown strength: The power frequency breakdown strength is ≥ 65 kV/mm, forming a "paper oil composite insulation" after oil immersion, and the breakdown voltage is increased by more than 50%.
Low dielectric loss and high resistance: volume resistivity>1 × 10 ¹Ω· cm, dielectric loss factor tan δ ≤ 0.003, low partial discharge, stable under high voltage.
Good oil compatibility: The porous structure quickly absorbs oil, the dielectric constant (3.5-4.0) matches the insulating oil, the electric field distortion is small, and it is not easy to climb.
2、 Strong mechanical flexibility and adaptability (installation/anti vibration key)
Flexible bending: The wrinkle structure has good lateral elasticity and can bend 360 ° without breaking or cracking layers, making it suitable for complex wiring and narrow spaces.
Expansion buffer: elongation rate of 15% -25% (flat paper only 3% -5%), can offset conductor thermal expansion and contraction, and prevent insulation cracking/detachment.
High adhesion: Soft and snug fit on the irregular surface of the conductor, with no gaps or air gaps, and no dead corners in insulation.
Sufficient strength: high tensile strength, hard to damage when winding/threading, vibration resistant and aging resistant.
High temperature resistance level: Standard A level (105 ℃), optional F level (155 ℃)/H level (180 ℃), short-term overload can reach 200 ℃.
High heat dissipation efficiency: The wrinkled structure increases the surface area by 20% -40%, with more oil storage and fast heat conduction, reducing operating temperature rise.
Thermal cycling resistance: repeated heating and cooling without deformation or delamination, suitable for long-term start stop conditions of transformers.
4、 Chemical stability and long lifespan (reducing operation and maintenance costs)
High purity without impurities: alpha cellulose ≥ 95%, low chlorine (≤ 25 ppm), low metal ions, non corrosive to copper conductors.
Oil and moisture resistance: long-term immersion in oil without swelling or degradation; When the moisture content is less than 0.5%, it is resistant to hydrolysis and has a lifespan of 20-30 years.
Flame retardant/arc extinguishing: A carbonized layer is formed on the lower surface of the arc to prevent arc diffusion and assist in arc extinguishing.
5、 Easy to install and cost-effective (production/maintenance friendly)
Easy to thread/wrap: lightweight and soft, no need for special tools, manual quick threading of leads and winding of windings.
Complete specifications: inner diameter of 4-50 mm, wall thickness of 1-6 mm, customizable length, suitable for multiple voltage levels.
High cost-effectiveness: cheaper than pure plastic/cardboard tubes, with long lifespan, low failure rate, and low overall cost.
6、 Typical application scenarios
Oil immersed transformer: high voltage leads, tap changer, winding ends, screw insulation.
Reactors and transformers: internal leads and inter turn insulation.
Other high-voltage equipment: scenes that require flexibility, oil resistance, and high-temperature insulation.
We use cookies to offer you a better browsing experience, analyze site traffic and personalize content. By using this site, you agree to our use of cookies.
Privacy Policy
