Industrial Lubricants

LUMINOL TR/TRi - High-Efficiency Electrical Insulating Fluids

LUMINOL Outperforms Naphthenic Electrical Insulating Oils

Buy Luminol TR

Petro-Canada’s LUMINOL family of electrical insulating fluids represents a breakthrough in electrical insulating fluids technology. Unlike naphthenic mineral oils, LUMINOL uses Petro‑Canada’s ultra-pure severely hydrotreated iso-paraffin base fluids to help minimize power loss and maximize your productivity. These fluids contain no corrosive sulphur that may lead to transformer breakdown.
LUMINOL fluids withstand energy spikes, as well as hot and cold weather extremes, better than naphthenic electrical insulating oils. Thanks to their naturally high oxidation stability, LUMINOL fluids resist breakdown longer and help provide extended service life. So you spend less money on routine transformer maintenance and fluid top-up, and less time worrying about your transformers’ efficiency.
LUMINOL delivers worry-free, corrosive sulphur-free performance in your transformer.

Environmental, Health & Safety Benefits

LUMINOL fluids in your transformers can help reduce disposal costs and the potential impact of spills, as well as answer possible community concerns about transformer oil toxicity. Petro‑Canada produces LUMINOL fluids using the patented HT purity process combined with Hydroisomerization. These ultra-pure fluids are inherently biodegradable in natural environments, free of carcinogenic polynuclear aromatics (PNAs) and virtually non-toxic. As well, LUMINOL’s negative gassing tendency and high flash point help reduce the risk of fire and explosion.

Facts about LUMINOL TR/TRi

LUMINOL TR and LUMINOL TRi are ideal for use in large power and distribution transformers operating at peak capacity as well as free-breathing units, pad mount, and pole mount transformers; for commercial, industrial and institutional applications:

  • LUMINOL TR is designed for Type I applications.
  • LUMINOL TRi is designed for Type II applications.
  • Both fluids meet or exceed the performance requirements of CSA-C50 (Class A and B), ASTM D3487 standards, and DOBLE TOPS specifications.
  • LUMINOL TR and TRi meet the CSA-C50 upgraded oxidation stability Special Requirements for Type III and Type IV fluids respectively.
  • LUMINOL is approved for applications requiring Ontario Hydro M-104.
  • LUMINOL TR meets International Electrotechnical Commission,
  • IEC 60296 General specifications for trace inhibited transformer oil.
  • LUMINOL TRi meets IEC 60296 General specifications for inhibited transformer oil.


Demonstrated Characteristics Include:

  • Excellent heat transfer capability to help enhance transformer performance.
  • Outstanding oxidation stability to help extend the service life of circuit breakers and LTCs.
  • High dielectric impulse strength to improve performance in the presence of overvoltage conditions.
  • Low power-factor (dielectric loss) to reduce thermal runaway under conditions of high electric stress.
  • Negative gassing to reduce the risk of failure from hydrogen gas bubbles.
  • Full compatibility with existing naphthenic insulating oils, which enhances the performance of the combined fluids.
  • LUMINOL TR and TRi contain no corrosive sulphur compounds and do not require passivators.
  • LUMINOL TR and TRi are colourless.