“Type 2” is commonly used to describe a mineral insulating oil with specific performance requirements, often emphasizing low pour point or improved low temperature behavior, or defined inhibitor status depending on the standard being referenced. Applications typically include outdoor transformers in colder climates, distribution and power transformers requiring stable viscosity and flow at low ambient temperatures, and systems where starting oil circulation and cooling reliability are critical. The exact meaning depends on the national or utility specification, so procurement should reference the governing standard and acceptance tests.
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