What does PCB composition in transformer oil mean?

PCB (polychlorinated biphenyls) was originally widely used as synthetic insulating oil because of its good electrical properties and low flammability. Polychlorinated biphenyls (PCBs) were banned in many countries when they were found to have adverse effects on the environment. Transformer oil produced by petroleum does not contain PCBs.

Polychlorinated biphenyls (PCBs) are carcinogens, which easily accumulate in adipose tissue, causing diseases in brain, skin and viscera, and affecting nervous, reproductive and immune systems.

Polychlorinated biphenyls are extremely insoluble in water, soluble in fat and organic solvents, and extremely difficult to decompose, so they can be enriched in a large number of bio-fats.

The physical and chemical properties of PCB are extremely stable and highly resistant to acid, alkali and oxidation. Non-corrosive to metals, with good electrical insulation and heat resistance (complete decomposition requires 1000℃ to 1400℃), non-combustible except monochloride and dichloride. PCB is widely used, such as insulating oil, heat carrier, lubricating oil, etc. It can also be used as an additive for many industrial products (such as various resins, rubber, adhesives, coatings, carbon paper, ceramic glaze, flame retardant, pesticide filler, dye dispersant, etc.).

Transformer oil: It is the fractionation product of petroleum, and its main components are alkanes, naphthenic saturated hydrocarbons, aromatic unsaturated hydrocarbons and other compounds. Commonly known as square shed oil, light yellow transparent liquid with relative density of 0.895. freezing point