Definition: | mineral insulating oil, containing no antioxidant, but which may contain other additives
NOTE – In certain countries insulating oils containing a mass fraction of up to 0,08 % of 2,6-di-tert-butyl-paracresol (DBPC) and/or 2,6-di-tert-butyl-phenol (DBP) are considered as uninhibited oil.
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