Home > Product Center > Electrical insulating oil > Transformer Oil
Transformer Oil
Electrical insulating oil

Transformer Oil

U / T / I Series

Electrical Insulation Cooling and Heat Dissipation High Pressure -10°C ~ -40°C

Excellent electrical insulation and heat dissipation performance, combined with good oxidation stability and low-temperature fluidity, ensuring long-term stable operation of electrical equipment.

Electrical Insulation High breakdown voltage
Cooling and Heat Dissipation Effective heat transfer
Oxidation Stability Extended Service Life
Low-Temperature Flow Good low-temperature startability
Get Quote

Product Description

Excellent electrical insulation properties, high breakdown voltage, low dielectric loss factor, effectively preventing discharge phenomena and power loss in high-voltage electric fields; good thermal and oxidation stability, preventing acid and sludge formation during use, extending the service life of electrical equipment; low viscosity providing effective cooling, heat transfer, and low-temperature startability; excellent low-temperature performance without pour point depressants; suitable naphthenic and aromatic content to ensure dissolution of sludge formed during operation of electrical equipment without damaging insulating materials or affecting heat transfer. Suitable for internal cooling of transformers up to and including 330kV and other electrical equipment with similar requirements.

  • Excellent electrical insulation performance, high breakdown voltage
  • Excellent thermal stability and oxidation stability
  • Good Cooling and Heat Transfer Properties
  • Excellent Low-Temperature Performance with Low Pour Point
Engine Oil Filling Scene

Product Parameters

Item Grade   U-30 T-30 I-30 Test Method
Density (20°C), kg/m³, not more than 895 895 895 GB/T1884
Kinematic Viscosity, mm²/s, -30°C, not more than 1800 1800 1800 GB/T265
Pour Point, °C -30 -30 -30 GB/T3535
Flash Point (Closed Cup), °C, not lower than 135 135 135 GB/T261
Acid Value, mgKOH/g 0.01 0.01 0.01 GB/T264
Breakdown Voltage (After Treatment), KV, not less than 70 70 70 GB/T507
Dielectric Dissipation Factor (90°C), not more than 0.005 0.005 0.005 GB/T5654
Interfacial Tension, mN/m, not less than 40 40 40 GB/T6541
Antioxidant Content, Mass Fraction % None 0.08 0.08~0.4 SH/T0802