BS-5901-1980 IEC-60112-1979.pdf
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1、BRITISH STANDARD BS 5901:1980 IEC 112:1979 Method of test for Determining the comparative and the proof tracking indices of solid insulating materials under moist conditions IEC title: Method for determining the comparative and the proof tracking indices of solid insulating materials under moist con
2、ditions UDC 621.315.611.001.4:620.193.23:621.317.333.6 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:52:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5901:1980 This British Standard, having been prepared under the direction of the General Electrotechnical Engineering Standards Committ
3、ee, was published under the authority of the Executive Board and comes into effect on 31 March 1980 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference GEL/16 Draft for comment 77/20316 DC ISBN 0 580 11262 4 Cooperating organizations The General Electrot
4、echnical Engineering Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Associated Offices Technical Committee British Approvals Service for Electric Cables
5、Ltd. British Electrical and Allied Manufacturers Association (BEAMA) British Radio Equipment Manufacturers Association British Steel Corporation Department of Energy (Electricity) Electric Cable Makers Confederation Electrical Contractors Association Electrical Contractors Association of Scotland El
6、ectrical Research Association* Electricity Supply Industry in England and Wales* Electronic Components Industry Federation* Engineering Equipment Users Association Health and Safety Executive Home Office Institution of Electrical Engineers Ministry of Defence* National Coal Board* Oil Companies Mate
7、rials Association Post Office* Telecommunication Engineering and Manufacturing Association (TEMA)* The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Adhesive Ta
8、pe Manufacturers Association British Paper and Board Industry Federation (PIF) Department of Industry (British Calibration Service) Department of Industry (National Physical Laboratory) Electrical and Electronic and Insulation Association (BEAMA) Rotating Electrical Machines Association (BEAMA) The
9、Transmission and Distribution Association (BEAMA) Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:52:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5901:1980 BSI 07-1999i Contents Page Cooperating organizationsInside front
10、 cover National forewordii 1Scope1 2Definitions1 2.1Tracking1 2.2Electrical erosion1 2.3Comparative tracking index (CTI)1 2.4Proof tracking index (PTI)1 3Test specimen1 4Conditioning1 5Test apparatus2 5.1Electrodes2 5.2Test circuit2 5.3Dropping device2 5.4Test solutions2 6Procedure2 6.1General2 6.2D
11、etermination of the CTI3 6.3Proof tracking test3 6.4Determination of erosion3 7Report4 Figure 1 Electrode4 Figure 2 Electrode arrangement5 Figure 3 Example of test apparatus5 Figure 4 Example of test circuit6 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri D
12、ec 01 14:52:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5901:1980 ii BSI 07-1999 National foreword This British Standard is identical with IEC Publication 112 (third edition) “Method for determining the comparative and the proof tracking indices of solid insulating materials under moist conditi
13、ons” published in 1979 by the International Electrotechnical Commission (IEC). This British Standard is published under the direction of the General Electrotechnical Engineering Standards Committee. Terminology and conventions. The text of the international standard has been approved as suitable for
14、 publication, without deviation, as a British Standard. Some terminology and certain conventions are not identical with those used in British Standards; attention is especially drawn to the following. In Figure 1 and Figure 2 the comma has been used as a decimal marker. In British Standards it is cu
15、rrent practice to use a full point on the baseline as the decimal marker. The page numbers in the text refer to the IEC page numbers. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. C
16、ompliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International standardaCorresponding British Standard IEC 587:1977BS 5604:1978 Method of test for evaluating resistance to tracking and erosion of electrical insulating materials used under
17、severe ambient conditions (Identical) a Undated in the text. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporate
18、d. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:52:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5901:1980 BSI 07-19991 1 Scope This method of test indicates the relative resistance of solid electrical insulatin
19、g materials to tracking for voltages up to 600 V when the surface is exposed under electric stress to water with the addition of contaminants. Tracking may occur during this test when voltage is applied between a defined electrode arrangement on the surface of a material and drops of electrolyte are
20、 applied between them at defined intervals of time. The number of drops needed to cause failure increases with the reduction of the applied voltage and, below a critical value, tracking ceases to occur. Materials which do not track at the highest test voltage may erode differently. The depth of eros
21、ion can be measured. Some materials may ignite during the test. NOTE 1The grading of materials reached by this method may possibly differ from that obtained by other testing methods for assessing tracking resistance, for example tests based on the use of high voltage, low-current discharges. This te
22、st method provides good resolution between materials with relatively poor tracking resistance. It lacks resolution for materials normally required for outdoor use for which the test method in IEC Publication 587: Test Method for Evaluating Resistance to Tracking and Erosion of Electrical Insulating
23、Materials Used under Severe Ambient Conditions, should be used. NOTE 2The test results as such cannot be used directly for the evaluation of safe creepage distances when designing electrical apparatus. 2 Definitions 2.1 tracking the progressive formation of conducting paths, which are produced on th
24、e surface of a solid insulating material, due to the combined effects of electric stress and electrolytic contamination on this surface 2.2 electrical erosion the wearing away of insulating material by action of electrical discharges 2.3 comparative tracking index (CTI) the numerical value of the ma
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