Descriptors | Type o protected electrical equipment, Protected electrical equipment, Electrical equipment, Explosive atmospheres, Oil-immersed transformers, Oil-filled electrical equipment, Mineral oils, Insulating oils, Liquid electrical insulating materials, Fire point (temperature), Flash point, Kinematic viscosity, Pour point, Acidity, Safety measures, Marking, Temperature, Type testing, Quality control, Pressure testing, Testing conditions, Liquid-level indicators |