標準號：BS EN 50353-2001
中文標準名稱：絕緣油.用顯微鏡計數法測定纖維污染物
英文標準名稱：Insulating oil - Determination of fibre contamination by the counting method using a microscope
標準類型：E38
發布日期：2001/11/7 12:00:00
實施日期：2001/11/7 12:00:00
中國標準分類號：E38
國際標準分類號：29.040.10
適用范圍：This European Standard specifies two methods for determining the fibre contamination of mineral insulating oil used in electrotechnical equipment, based on filtering a sample of oil and examining and counting the number of fibres on the surface of the filter using an optical microscope. Fibres down to 100 μm in length can be sized and counted by these methods. The methods are applicable both to unused oils and to oils in service. The method specified in the main text is applicable to oil samples taken from barrelled oil or from electrotechnical equipment in service, in which the fibre concentration is expected to be relatively high. The alternative method specified in annex A is applicable to samples taken from new oil in bulk containers, or from large transformers which have not been operated much since they were filled, in which the fibre concentration is expected to be relatively low. NOTE These methods are also suitable for other insulating liquids such as silicones and synthetic esters.