IEC 62893-2-2017 pdf free.Charging cables for electric vehicles of rated voltages up to and including 0,6/1 kV – Part 2: Test methods.
5.3.2 RequIrements to resistance against chemicals
The tested cable shall show no crack when examined with normal or corrected vision without magnification after bending around a mandrel with a diameter of five times the outer diameter of the cable or smaller.
5.4 Water resistance test
5.4.1 General Test pieces shall be prepared according to 4.3 of lEG 60811-501:2012. The cross-sectional area of the test pieces shall be determined before immersion in water.
5.4.2 Procedure
The test pieces shall be immersed in deionised (or distilled) water at the temperature and for the time specified in the particular specification. At the end of the immersion time, the test pieces shall be removed from the water and suspended in air at ambient temperature avoiding direct sunlight for at least 16 h but not more than 24 h. The test pieces shall be subjected to the tensile strength test procedure as per IEC 60811-501.
5.4.3 Requirements
The percentage of the maximum variation for the tensile strength, the percentage of the minimum of the elongation at break and the percentage of the maximum variation of the elongation at break shall be determined.
The results shall be in accordance with the requirements specified in the particular specification.
5.5 Tear resistance test
5.5.1 Sampling and preparation of the test piece
Take a sample of the sheath from the cable and prepare three test specimens, having the dimensions shown in Figure 1, by accurately cutting or punching them from the sample.
For cables having an outer diameter less than 10 mm, the width of the test piece may be approximately equal to the circumference of the sheath.
Using a sharp blade, make a central longitudinal cut, as shown in Figure 1, perpendicular to the width of the test piece. Where grooves caused by the cores are present, make the cut at the thinnest part of one of the grooves nearest the centre of the test specimen.
Determine the mean thickness of each test piece from three measurements taken at points equidistant along the expected tear length.
5.5.2 CondItioning of test pieces
Before commencing the test, all test pieces shall be kept for at least three hours at the temperature of (20 ± 5) °C.
5.5.3 Test procedure
Place one half of the split end of the test piece as shown in Figure 2, in the jaws of a tensile testing machine.
Separate the jaws at a rate of (250 ± 50) mm/mm.
5.5.4 Expression of results
If the tear reaches the marker-line indicated in Figure 1 the test shall be deemed valid. If the tear runs towards one of the sides of the test piece before this marker-line, it shall be ignored. At least two valid results shall be obtained otherwise more test pieces shall be prepared and tested.
The tear resistance of each test piece shall be determined by dividing the maximum tear load, in N, by the mean thickness in mm.
The value of the tear resistance recorded shall be the mean value of the valid values obtained.IEC 62893-2 pdf download.