BS EN 60587-2007 Electrical insulating materials used under severe ambient conditions - Test methods for evaluating resistance to tracking and erosion《在严酷环境条件下使用的电气绝缘材料 耐起痕和耐侵蚀评定的试.pdf

1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58conditions Test methods for evaluating resistance to tracking and erosionThe European Standard EN 6

2、0587:2007 has the status of a British StandardICS 17.220.99; 29.035.01Electrical insulating materials used under severe ambient BRITISH STANDARDBS EN 60587:2007BS EN 60587:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2007 BSI

3、 2007ISBN 978 0 580 56252 5Amendments issued since publicationAmd. No. Date CommentsThis publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligati

4、ons.National forewordThis British Standard is the UK implementation of EN 60587:2007. It is identical to IEC 60587:2007. It supersedes BS 5604:1986 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee GEL/112, Evaluation and qualification of electrical insu

5、lating materials and systems.A list of organizations represented on this committee can be obtained on request to its secretary.EUROPEAN STANDARD EN 60587 NORME EUROPENNE EUROPISCHE NORM July 2007 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrote

6、chnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60587:2007 E ICS 17.220.99; 29.035.01 English version Electri

7、cal insulating materials used under severe ambient conditions - Test methods for evaluating resistance to tracking and erosion (IEC 60587:2007) Matriaux isolants lectriques utiliss dans des conditions ambiantes svres - Mthodes dessai pour valuer la rsistance au cheminement et lrosion (CEI 60587:2007

8、) Elektroisolierstoffe, die unter erschwerten Bedingungen eingesetzt werden - Prfverfahren zur Bestimmung der Bestndigkeit gegen Kriechwegbildung und Erosion (IEC 60587:2007) This European Standard was approved by CENELEC on 2007-06-01. CENELEC members are bound to comply with the CEN/CENELEC Intern

9、al Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC mem

10、ber. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELE

11、C members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia,

12、Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of document 112/56/FDIS, future edition 3 of IEC 60587, prepared by IEC TC 112, Evaluation and qualification of electrical insulating materials and systems, was submitted to the IEC-CENELEC parallel vote and was approved

13、by CENELEC as EN 60587 on 2007-06-01. This European Standard supersedes HD 380 S2:1987. The main changes from HD 380 S2:1987 are as follows: experience has indicated the need for improved description of the experimental method; for the preparation of the test specimens, abrasion is recommended only

14、if necessary; the ventilation of the test chamber is described in detail; for specimens of soft elastomeric materials a mounting support is described; the maximum depth of erosion has to be reported in the classification. The following dates were fixed: latest date by which the EN has to be implemen

15、ted at national level by publication of an identical national standard or by endorsement (dop) 2008-03-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-06-01 _ Endorsement notice The text of the International Standard IEC 60587:2007 was approved

16、by CENELEC as a European Standard without any modification. _ 2 EN 60587:2007CONTENTS 1 Scope.4 2 Terms and definitions .4 3 Test specimens 5 3.1 Dimensions .5 3.2 Preparation .5 4 Apparatus.5 4.1 Electrical apparatus.5 4.2 Electrodes.7 4.3 Contaminant8 4.4 Timing device9 4.5 Depth gauge9 4.6 Ventil

17、ation .9 5 Procedure 10 5.1 Preparation of the test.10 5.2 Method 1: Application of constant tracking voltage 12 5.3 Method 2: stepwise tracking voltage13 5.4 End-point criteria.13 6 Test report14 Table 1 Test parameters 7 Figure 1 Test specimen with holes for fixing electrodes .5 Figure 2 Schematic

18、 circuit diagram 6 Figure 3 Example: typical circuit for an overcurrent delay relay (F in Figure 2).7 Figure 4 Top electrode, stainless steel 0,5 mm thick 8 Figure 5 Bottom electrode, stainless steel 0,5 mm thick .8 Figure 6 Assembly of the electrodes 9 Figure 7 Test assembly, schematic 10 Figure 8

19、Mounting support .11 Figure 9 Filter-paper (eight sheets requested for each top electrode).11 3 EN 60587:2007ELECTRICAL INSULATING MATERIALS USED UNDER SEVERE AMBIENT CONDITIONS TEST METHODS FOR EVALUATING RESISTANCE TO TRACKING AND EROSION 1 Scope This International standard describes two test meth

20、ods for the evaluation of electrical insulating materials for use under severe ambient conditions at power frequencies (45 Hz to 65 Hz) by measurement of the resistance to tracking and erosion, using a liquid contaminant and inclined plane specimens. The two methods are as follows: Method 1: constan

21、t tracking voltage; Method 2: stepwise tracking voltage. NOTE 1 Method 1 is the most widely used method as there is less need for continual inspection. NOTE 2 The test conditions are designed to accelerate the production of the effects, but do not reproduce all the conditions encountered in service.

22、 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 track partially conducting path created by localized deterioration on the surface of an insulating material 2.2 tracking progressive degradation of the surface of a solid insulating material by

23、 local discharges to form conducting or partially conducting paths NOTE Tracking usually occurs due to surface contamination. IEC 60050-212-01-421 2.3 erosion, electrical loss of material by leakage current or electrical discharge 2.4 time-to-track time required to produce tracks under the specified

24、 conditions of test 1IEC 60050-212:1990, International Electrotechnical Vocabulary Chapter 212: Insulating solids, liquids and gases 4 EN 60587:20073 Test specimens 3.1 Dimensions Flat specimens with a size of at least 50 mm X 120 mm shall be used. The preferred thickness shall be 6 mm. Other thickn

25、esses may be used, but must be mentioned in the test report. The specimens shall be drilled as shown in Figure 1, to attach the electrodes. 120 (at least)50(at least)9510 5 25 Reference marks IEC 672/07 Dimensions in millimetres Figure 1 Test specimen with holes for fixing electrodes 3.2 Preparation

26、 The specimens shall be washed with a suitable solvent (e.g. isopropyl alcohol) to remove leftovers such as fat from handling. After that the specimens shall be rinsed with distilled water. The cleaned specimens shall be mounted carefully to avoid contamination. If the contaminant does not wet the s

27、urface evenly within the observation time mentioned in 5.1, the surface of the specimens can be slightly abraded. The abrasion should be done with a fine (U.S. grade (CAMI): 400 mesh; European grade (FEPA): P800) aluminium-oxide- or zirconia-aluminia-abrasive under water until the whole surface wets

28、 and appears uniformly matt when dry. When abraded the specimen shall be cleaned another time with distilled water. Abrasion has to be mentioned in the test report. Specimens used for criterion B (see 5.4) shall have reference marks on both edges, 25 mm above the lower electrode (see Figures 1 and 7

29、). 4 Apparatus 4.1 Electrical apparatus A schematic circuit is given in Figure 2. As the test will be carried out at high voltages, it is obviously necessary to use an earthed safety enclosure. The circuit comprises: 5 EN 60587:2007 A 45 Hz to 65 Hz power supply with an output voltage stabilized to

30、5 % which can be varied up to about 6 kV with a rated current not less than 0,1 A for each specimen. Preferred test voltages are 2,5 kV, 3,5 kV and 4,5 kV, for method 1. FVTVT S Sp RIEC 673/07 Components S power supply switch VT variable ratio transformer T high-voltage transformer R series resistor

31、 V voltmeter Sp specimen F overcurrent device, fuse or relay Figure 2 Schematic circuit diagram NOTE If only one power supply is used for several specimens, each should have a circuit-breaker or a similar device (see 4.1, last sentence). A 200 W resistor with 10 % tolerance in series with each speci

32、men at the high-voltage side of the power supply. The resistance of the resistor shall be taken from Table 1. 6 EN 60587:2007Table 1 Test parameters Test voltage kVPreferred test voltage for method 1 kVContaminant flow rate ml/minSeries resistor, Resistance k1,0 to 1,75 - 0,075 1 2,0 to 2,75 2,5 0,1

33、5 10 3,0 to 3,75 3,5 0,30 22 4,0 to 4,75 4,5 0,60 33 5,0 to 6,0 - 0,90 33 A true r.m.s. voltmeter with an accuracy of 1,5 % of reading shall be used. An overcurrent delay relay (for example see Figure 3) or any other device which operates when 60 mA 6 mA or more has persisted in the high-voltage cir

34、cuit for 2 s to 3 s. +CRIReTrTo the power supply switch (S in Figure 2) IEC 674/07 Components Re rectifier Tr transformer (winding 300/900 turns) RI relay (2 500 /11 000 turns) C capacitor (200 F) Figure 3 Example: typical circuit for an overcurrent delay relay (F in Figure 2) 4.2 Electrodes All ele

35、ctrodes, fixtures and assembly elements associated with the electrodes, such as screws, shall be made of stainless steel e.g. grade 302. The electrode assembly is shown in Figure 6. NOTE The electrodes shall be cleaned prior to each test and replaced when necessary. The top electrode is shown in Fig

36、ure 4. The bottom electrode is shown in Figure 5. 7 EN 60587:200760 70 402520 15 25 2,567 5 5 IEC 675/07 Dimensions in millimetres Figure 4 Top electrode, stainless steel 0,5 mm thick 406 303 1020 5 5 20Six semi-circular cut-outs: 2,5 mm IEC 676/07 Dimensions in millimetres Figure 5 Bottom electrode

37、, stainless steel 0,5 mm thick 4.3 Contaminant Unless otherwise specified use 0,1 % 0,002 % by mass of NH4Cl (ammonium chloride) analytical quality, and 0,02 % 0,002 % by mass of isooctylphenoxypolyethoxyethanol (a non-ionic wetting agent) in distilled or de-ionized water. This contaminant shall hav

38、e a resistivity of 3,95 m 0,05 m at 23 C 1 C. The contaminant shall be not more than four weeks old and its resistivity shall be checked before each series of tests. Eight layers of filter-paper with a thickness of 0,2 mm 0,02 mm, of the approximate dimensions given in Figure 9, are clamped between

39、the top electrode and the specimen to act as a reservoir for the contaminant. The contaminant shall be fed into this filter-paper pad so that a uniform flow between the top and the bottom electrodes shall occur before voltage application. 8 EN 60587:2007NOTE This can be done by pumping the contamina

40、nt through a tube into the filter-paper pad. The tube can be held between the filter papers by a clip of stainless steel. Another possibility is to drip the contaminant into the filter-paper pad with a fixed drop size and fixed number of drops per minute. The rate of application of contaminant shall

41、 be that within 10 % specified in Table 1 in relation to the applied voltage. 50 Filter-paper pad under the top electrode Test specimen Top electrode 3 screws 4 20 6 washers 3 nuts All stainless steel Bottom electrode IEC 677/07 Dimensions in millimetres Figure 6 Assembly of the electrodes 4.4 Timin

42、g device A timing device with an accuracy of about 1 min/h shall be used. NOTE For example a 1 min pulser with a counter is acceptable. 4.5 Depth gauge A depth gauge with an accuracy of 0,01 mm shall be used. The point of the probe shall be hemispherical with a radius of 0,25 mm. 4.6 Ventilation The

43、 test chamber shall be equipped with a ventilation to allow an exhaust of steam and gaseous decomposition products. The ventilation of the test chamber should be moderate and constant to avoid permanent condensation of water. Direct airflow across the test specimens shall be avoided. NOTE Experience

44、 shows that the intensity of ventilation may influence the test result. 9 EN 60587:20075 Procedure 5.1 Preparation of the test Unless otherwise specified, the test shall be carried out at an ambient temperature of 23 C 2 C on sets of at least five specimens for each material. Mount the specimen, wit

45、h the flat test surface on the underside, at an angle of 45 2 from the horizontal as shown in Figure 7, with the electrodes 50 mm 0,5 mm apart. The test for further 5 specimen can be achieved either simultaneously or respectively. 45Contaminant feedTop electrode Reference mark Test specimen Bottom e

46、lectrode Insulating specimen support 25IEC 678/07 Dimensions in millimetres Figure 7 Test assembly, schematic NOTE 1 For each test, use a new filter-paper pad (see Figure 9). If the specimen is not self-supporting an insulating mounting support for the specimen must be used. The mounting support sha

47、ll be such that the heat dissipation from the back of the sample is not hindered and the material shall be heat resistant and electrically insulating (e.g. PTFE). An example of a mounting support is shown in Figure 8. Start introducing the contaminant into the filter-paper pad allowing the contamina

48、nt to wet the paper thoroughly. Adjust the contaminant flow and calibrate to give a flow rate as specified in Table 1. Observe the flow for at least 10 min and ensure that the contaminant flows steadily down the face of the test specimen between the electrodes. The contaminant shall flow from the qu

49、ill hole of the top electrode and not from the sides or the top of the filter-paper. 10 EN 60587:200780 45 70 35 150 Cutted section (60 70) mm2Et S Eb IEC 679/07 Dimensions in millimetres Components Et top electrode Eb bottom electrode MS mounting support S specimen Figure 8 Mounting support 70124040 15 5 IEC 680/07 Dimensions in millimetre