Capacitors are essential components in electrical and electronic circuits, and their reliable operation is heavily dependent on the quality of the insulating oil used. This article focuses on the crucial specifications of capacitor insulating oil, with a particular emphasis on Phenyl Xylyl Ethane (PXE) Oil, and its diverse applications. Understanding these parameters is vital for selecting the right fluid for optimal capacitor performance.

The primary function of capacitor insulating oil is to provide electrical insulation. High dielectric strength is paramount, meaning the oil must resist electrical breakdown under high voltage stress. Specifications such as Breakdown Voltage, typically measured in kilovolts (kV), indicate this capability. For instance, PXE oil often exhibits a breakdown voltage of 70 kV or higher, ensuring robust insulation for high-voltage capacitors. Another critical parameter is the Dielectric Dissipation Factor (tan δ), which measures the energy lost as heat in the dielectric material. A lower tan δ value, often below 0.001 at 90°C for PXE oil, signifies higher efficiency and less heat generation.

The Volume Resistivity is another key specification, indicating the oil's resistance to direct current flow. High volume resistivity, typically in the order of 10^12 Ω.m for PXE oil, confirms its excellent insulating properties. The Relative Permittivity (or dielectric constant), usually around 2.40-2.50 for PXE oil, influences the capacitance of the device and is an important factor in capacitor design.

Physical properties also play a significant role. The appearance is usually described as colorless to pale yellow transparent liquid, free from suspended impurities. Density (at 20°C), often ranging from 0.970-0.990 g/cm³, and viscosity (Kinetic Viscosity at 40°C), typically below 7.0 mm²/s for PXE oil, affect its flow characteristics and heat transfer capabilities. A low pour point, such as -40°C for PXE oil, is crucial for ensuring operational effectiveness in cold climates.

The chemical stability of the oil is also essential. An Acid Number, usually very low (≤0.015 mg KOH/g), indicates minimal acidity, which prevents corrosion of capacitor components. The Flash Point, typically above 140°C, indicates the oil's resistance to ignition, contributing to safety.

The applications of PXE oil are primarily centered around its use as an impregnating agent for film-paper composite dielectric capacitors and low-voltage full film capacitors. Its excellent compatibility with polypropylene film is a major advantage in these applications, ensuring the longevity and stable performance of the capacitors.

When manufacturers look to purchase capacitor insulating oil, understanding these specifications is crucial. NINGBO INNO PHARMCHEM CO.,LTD. provides high-quality Phenyl Xylyl Ethane Insulating Oil that meets these demanding requirements. We offer detailed product data and support to help clients select the most suitable dielectric fluid for their specific capacitor designs, ensuring optimal performance and reliability.