ISO 6722-1 pdf download – Road vehicles -6o v and 60o v single-core cables — Part 1: Dimensions, test methods and requirements for copper conductor cables.
5.12 AbrasIon test
5.12.1 General
This test is only applicable to cables with a conductor size 6 mm2. for wtiicli either 5. 124.1 (Sandpaper abrasion) or 5.12.4.2 (Scrape abrasion) shall be used. The customer and supplier shall define which test shall be used. No abrasion test Is required for conductor sizes >6 mm2.
5.12.2 Purpose
This test s Intended to verify that the resistance of the cable Insulation to abrasion meets customer
requirements
5.12.3 Test sample
Prepare a lest sample oil m in length and remove 25 mm of insulation from each end.
5.12.4 Test
5.12.4.1 Sandpaper abrasion
Measure the resistance to sandpaper abrasion using 1 50J garnet sandpaper tape with 5 mm to 10mm conductive strips perpendicular to the edge of the sandpaper spaced a maximum of every 75mm. Mount a suitable bradcet to the pivoting arm (see Figure 6) to maintain the test sample position over an unused portion of the sandpaper abrasion tape. Exert a force of (0.63 0.05) N on the test Sample by the combination of the bracket, support rod, and pivoting arm The total vertical force exerted on the test sample shall be the combination of the force exerted by the bracket. pwobng arm, support rod and additional mass. The additional mass shal be according to Table 10.
Mount the test sample taut, without stretching, in a horizontal pos4lori using an area of the sandpaper abrasion tape not previously used. Place the additional mass and bracket on top of the test sample. Draw the sandpaper abrasion tape under the test sample at a rate of (1 500 ± 75) mm/mm and record the length of sandpaper abrasion tape necessary to expose the conductor. Move the test sample 50 mm and rotate the test sample docb4se 90. Repast the procedure for a total of four readings. The mean of the readings shall determme the resistance to sandpaper abrasion.
5.13.4 Test
Place the test samples in the oven for 3000 h. Fix the test samples by the conductor to avoid any contact between the Insulation and the supports. The test samples shall be separated by at least 20 mm from each othe and from the inner surface of the oven, Cable insulations made of different materials shall not be tested at the same time. After ageang. withdraw the test samples from the oven and maintain them at RT for at least 16 h. After conditioning, perform the winding test. at RT accordi,g to 5.10 using a mandrel diameter according to Table 8. Column B. After wlndrng. make a visual examination of the Insulation If no exposed conductor is visible, perform the withstand voltage test; however, make the following changes to the procedure in 5.5:
– Immerse the test samples in the salt water bath for a minimum of 10 man pnor to the application of the voltage;
— Apply the 1 kV (a.c.) voltage for 1 ,sin:
Do not ramp up the voltage after the application of the 1 kV (ac.) voltage.
5.13.5 Requirement
After winding, no conductor shall be visible. During the withstand voltage test, breakdown shall not oajr.
5.14 Short term heat ageing, 240 h
5.14.1 Purpose
This test Is intended to simulate thermal excursions.
5.14.2 Test samples
Prepare two test samples, each of a minimum length of 350 mm, and remove 25 mm of insulation from each end.
5.14.3 Apparatus
Perform the short term ageing test using an oven at the temperature as specified m Table 13 and a freezing chamber at (—25 ±2) C. See 5.10. Table 8. Column A, for mandrel anieter.
ISO 6722-1 pdf download – Road vehicles -6o v and 60o v single-core cables — Part 1: Dimensions, test methods and requirements for copper conductor cables
