PTFE High Voltage Insulation with Low Leakage Current and High Thermal Stability

Leakage current and thermal stability are two core indicators that determine the long-term operational efficiency and safety of high-voltage insulation systems. Excessive leakage current will lead to increased power loss, equipment heating and accelerated insulation aging, while poor thermal stability will cause insulation performance attenuation and structural failure under temperature fluctuation. In high-precision power equipment, high-voltage power transmission systems and energy storage equipment, low leakage current and high thermal stability insulation materials are essential to ensure equipment energy efficiency and operational safety. PTFE high voltage insulation materials stand out among various insulation materials by virtue of ultra-low leakage current and excellent wide-temperature thermal stability, becoming high-end insulation solutions for high-efficiency power systems PTFE TUBE.

PTFE has ultra-high volume resistivity up to 1×10¹⁶ Ω·cm, which is far higher than most engineering insulation materials, enabling it to effectively block current penetration and achieve extremely low leakage current performance. Under long-term high-voltage DC and AC working conditions, the leakage current of PTFE insulation is maintained at an ultra-low microampere level, which greatly reduces power transmission loss and avoids equipment overheating and insulation aging caused by leakage current accumulation. Different from traditional insulation materials whose leakage current increases sharply with the rise of voltage and temperature, the leakage current of PTFE materials has extremely low temperature and voltage sensitivity, maintaining stable low-loss performance in a wide working range.

In terms of thermal stability, PTFE insulation materials have unparalleled wide-temperature adaptive performance. The material does not undergo thermal deformation, molecular aging or performance attenuation in the temperature range of -200°C to 260°C, and can work continuously at 260°C for a long time. In the process of equipment load fluctuation and intermittent high-temperature operation, PTFE insulation can always maintain stable physical structure and dielectric properties, avoiding insulation failure caused by thermal expansion and contraction fatigue. Even in instantaneous ultra-high temperature impact environments, PTFE will not melt or decompose, effectively ensuring the continuous and stable operation of the insulation system PTFE SHEET.

The dual advantages of low leakage current and high thermal stability make PTFE insulation widely used in high-precision high-voltage equipment such as power capacitors, high-voltage transformers, precision power supplies and energy storage systems. PTFE sheets and tubes used for equipment insulation can effectively reduce system power loss, improve equipment energy efficiency, and extend the service life of electrical components. In addition, PTFE materials have excellent anti-aging and anti-pollution performance, which can resist the influence of environmental humidity, dust and corrosive media on leakage current, ensuring that the low-loss and high-stability performance of the insulation system does not decay with the extension of service time.

Comparative tests show that compared with rubber, PVC and epoxy insulation materials, PTFE high voltage insulation reduces system leakage current loss by more than 70%, and the thermal stability service life is increased by more than twice. In the context of energy conservation and high-efficiency operation of modern power systems, PTFE high voltage insulation materials with low leakage current and high thermal stability have become the preferred materials for high-end power equipment insulation, providing reliable guarantee for energy-saving, efficient and long-term stable operation of power systems.