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Transformer Oil is blended with highly refined mineral base oil and well-chosen anti-oxidizer. Without Polychlorinated Biphenyl (PCB), it is suitable for insulation and cooling for transformer, oil immersed switch and other insulation device of electrical appliances.The product comprises several grades such as 10, 25, 40, 45 according to its low temperature performance. Advantages ♦ Outstanding electrical insulation performance, effectively preventing occurrence of discharge in electric field ♦ Good oxidation stability, effectively preventing formation of acidic material and sludge ♦ Good thermal conductivity, ensuring effective cooling of transformer core and coiling Performance The product meets the following specifications: ♦ GB 2536-90 ♦ Q/SH303 535-2009 ♦ IEC 60296-2003Applications ♦ As insulating and cooling medium for transformer of 330kV or below as well as electrical appliance with similar requirements Typical properties Test Items Typical Data Test Method 25#Transformer Oil45#Transformer OilDensity at 20 kg/m3 876.3877.4GB/T1884 Kinematic Viscosity, mm2/s GB/T265 at -10 163.1 at -30 1433 at 40 9.6889.620 Pour Point, -24GB/T3535 Solidification Point, -46GB/T510 Flash Point, 142142.5GB/T261 Acid Number,mgKOH/g 0.0150.016GB/T264 2.5mmBreakdown Voltage,KV 42.842GB/T507 Dissipation Factor,90 0.000680.00078GB/T5654 Interfacial Tension,mN/m 42.642.4GB/T6541 Water Content mg/kg 2118SH/T0207 Soluble Acid or Alkali,% GB/T259 Corrosive Sulphur SH/T0304 Oxidation Stability SH/T0206 Acid Number,mgKOH/g 0.01580.112 Sludge,% 0.01380.0118