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IEC 60970 Ed. 2.0现行

Insulating liquids - Methods for counting and sizing particles

出版：International Electrotechnical Committee

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基本信息

标准编号： IEC 60970 Ed. 2.0

发布时间：2007/7/16 0:00:00

标准类别：Standard

出版单位：International Electrotechnical Committee

标准页数：37

标准简介

Describes the sampling procedures and methods for the determination of particle concentration and size distribution. Three methods are specified. One uses an automatic particle size analyser, working on the light interruption principle. The other two use an optical microscope, in either the transmitted light or incident light mode, to count particles collected on the surface of a membrane filter. The optical microscope methods are described in ISO 4407. All three methods are applicable to both used and unused insulating liquids. Annex A contains an alternative sampling procedure using a syringe and Annex B reports a reference for the calibration of automatic particle counters. The significant technical changes with respect to the previous edition are as follows: - new calibration procedures for automated laser particle; - three figures contamination code; - new procedure of sample pre-treatment when automated laser counter method are used.

本标准替代的旧标准

IEC 60970 Ed. 1.0

等同采用的国际标准

DIN IEC 60970 (1998-01) - Identical

VDE 0370-14:1998 - Identical

NFC 27 232:1990 - Identical

UNE 21970:1995 - Identical

CEI EN 60970 Ed. 1 (2007) - Identical

BS EN 60970:2007 - Identical

NF EN 60970:2007 - Identical

I.S. EN 60970:2007 - Identical

NEN EN IEC 60970:2007 - Identical