1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21053-3 SANS 5511:2008Edition 3SOUTH AFRICAN NATIONAL STANDARD Oil resistance of vehicle ignition cables Published by Standards South Afri
4、ca 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code +27 12 www.stansa.co.za Standards South Africa SANS 5511:2008 Edition 3 Table of changes Change No. Date Scope Foreword This South African standard was approved by National Committee
5、 StanSA TC 66, Electric cables, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This document was published in February 2008. This document supersedes SABS SM 511:1980 (first revision). SANS 5511:2008 Edition 3 1 Oil resistance of vehicle
6、 ignition cables 1 Scope This standard specifies a method for the determination of the oil resistance of vehicle ignition cables. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. Fo
7、r undated references, the latest edition of the referenced document (including any amendments) applies. Information on currently valid national and international standards can be obtained from Standards South Africa. SANS 6284-3, Test methods for cross-linked polyethylene (XLPE) insulated electric c
8、ables Part 3: Tests on finished cable. 3 Apparatus 3.1 Rubber cables 3.1.1 Metal mandrel of diameter 25 mm. 3.1.2 Micrometer capable of reading to an accuracy of at least 0,1 mm. 3.2 PVC cables 3.2.1 Metal mandrel of diameter 25 mm. 3.2.2 High-voltage a.c. test equipment as in SANS 6284-3. 4 Test me
9、dium Unused mineral lubricating oil that complies with the relevant requirements for oil of grade SAE 20. 5 Test specimens 5.1 In the case of rubber cables, one 450 mm length of finished rubber cable. SANS 5511:2008 Edition 3 2 5.2 In the case of PVC cables, one 750 mm length of finished PVC cable.
10、6 Procedure 6.1 Rubber cables 6.1.1 Measure the average outside diameter of the specimen to the nearest 0,1 mm. 6.1.2 Subject the specimen to 10 cycles of bending, each of which is carried out as follows: so wind the full length of the specimen round the mandrel as to form a tight spiral; unwind the
11、 specimen and wind again as given above but subjecting the surface of the specimen that was under maximum tension to maximum compression. 6.1.3 Remove the specimen from the mandrel, bend it into a U-loop that has straight sides of length at least 100 mm, and immerse it to within 25 mm of the ends in
12、 the test medium at room temperature. 6.1.4 Raise the temperature of the oil to 100 C 2 C and maintain it at this temperature for 5 h. 6.1.5 Remove the specimen from the oil, wipe it, and allow it to cool to room temperature. 6.1.6 Measure the average diameter of the immersed parts of the straight p
13、ortions of the U-loop to determine whether swelling has taken place, and examine for stickiness, softness, blisters, and other defects. 6.2 PVC cables 6.2.1 Leaving a free length of at least 75 mm at each end, wind the specimen round the metal mandrel as follows: Number of turns. 5 Spacing between t
14、urns 19 mm Speed of winding. 1 turn/s Load applied during winding 45 N 6.2.2 So immerse the mandrel and specimen in the test medium that a length not less than 75 mm at each end of the cable protrudes above the surface of the oil. Raise the temperature of the oil to 90 C 2 C and maintain it at this
15、temperature for 48 h. 6.2.3 Remove the mandrel and specimen from the oil, remove the specimen from the mandrel, wipe it, and allow it to cool to room temperature. 6.2.4 Form the specimen into a coil of diameter not less than 75 mm and that has a free length of not less than 75 mm at each end, and im
16、merse the coiled part in water at room temperature. 6.2.5 Earth the water and apply an alternating voltage of any frequency between 25 Hz and 100 Hz between the conductor of the specimen and the water. Raise the voltage gradually to 25 kV r.m.s. and maintain it at this value for 5 min. Standards South Africa
