Mechanical usage for Unused Mineral Insulating Oils for Transformers and Switchgear

For in - service liquid filled electric apparatus, sampling of the liquid dielectric provides a method to determine the condition of the solid and liquid insulation as well as the operating condition of the apparatus without opening or de - energizing th e apparatus. This is especially important in the present utility climate, as equipment outages for out of - service testing has become very limited. Sampling provides a means to check the condition of oil in storage whether it be new or used, to determine i f it complies with specifications. Sampling can also help to determine: 1) If accidental mixing of different dielectric liquids has taken place; 2) If the method of transportation contaminated the dielectric Liquid; and 3) If the handling equipment to tran sfer the dielectric liquid contaminated the product.