National Petroleum Corporation of Namibia (PTY) Ltd

National Petroleum Corporation of Namibia (PTY) Ltd

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Sasol Electrical Insulating Oil 15 is a naphthenic oil specially refined to have high dielectric strength and good long-term oxidation stability.  Insulating Oil, Electrical, Grade 15.


Sasol Electrical Insulating Oil 15 is intended for:

  • transformers
  • switchgear
  • hydraulic thrustors
  • Dashpots
  • oil-filled electrical equipment

Sasol Electrical Insulating Oil 15 is a non-inhibited, gas-evolving, additive-free oil.

NOTE: The water content of Sasol Electrical Insulating Oil 15 can be reduced to below 10 ppm.

Product Specifications

  • Australian Standard AS 1767
  • BSI BS 148 Class 1
  • IEC (1982) Publication 296 Class 1
  • SEV(1982) 3163 Class 1

Typical Characteristics

Viscosity mm2/s   D445 71
@ 100°C   2,4    
@ 40°C   9,3    
@ -30°C   1180    
Viscosity Index   62 D2270 226
Pour Point °C -57 D97 15
Flash Point (PMCC) °C 145 D92 36
Water Content * ppm <20 D1533  
Density @ 20°C kg/m3 886 D4052 365
Electric Strength kV 70 IEC Publication 156 or
5.3 of SABS 555
Dielectric Dissipation Factor (Tan Delta @ 90°C) Tan loss <0,001 5.4 of SABS 555  
Neutralisation Value mg KOH/g 0,15 IEC Publication 247 or
5.2 of SABS 555
Oxidation Stability:     IEC Publication 74 or
5.5 of SABS 555
a).Neutralisation value after oxidation mg KOH/g 0,15    
b).Total sludge content after oxidation Wt-% 0,02    

*Product supplied in drums and bulk is vacuum dehydrated to remove water to below 10 ppm.

Storage and Handling

  • cannot be avoided. Where eye contact is a potential hazard, goggles or face shields should be worn.
  • Ambient temperatures and atmospheric pressures normally encountered within buildings or roofed-over outdoor storage areas are acceptable.
  • Avoid entering areas where mists or vapours have built up as a result of abnormal temperatures or pressures without the proper breathing equipment and protective clothing.

Pack Information

Product CodePack Size
  20 L
  210 L
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