Home>IEC standards>IEC 60811-1-3-2001 pdf free download

IEC 60811-1-3-2001 pdf free download

IEC 60811-1-3-2001 pdf free download.Common test methods for insulating and sheathing materials of electric and optical cables – Part 1-3: General application – Methods for determining the density – Water absorption tests – Shrinkage test.
The following normative document contain provisions which, through reference in this text, constitute provisions of this part of IEC 60811. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 60811 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards.
ISO 1183:1987, Plastics — Methods for determining the density and relative density of non- cellular plastics
2 Test values
Full test conditions (such as temperatures, durations, etc.) and full test requirements are not specified in this standard; it is intended that they should be specified by the standard dealing with the relevant type of cable.
Any test requirements which are given in this standard may be modified by the relevant cable standard to suit the needs of a particular type of cable.
3 Applicability
Conditioning values and testing parameters are specified for the most common types of insulating and sheathing compounds and of cables, wires and cords.
4 Type tests and other tests
The test methods described in this standard are intended, in the first instance, to be used for type tests. In certain tests, where there are essential differences between the conditions for type tests and those for more frequent tests, such as routine tests, these differences are indicated.
5 Pre-conditioning
All the tests shall be carried out not less than 16 h after the extrusion or vulcanization (or cross-linking), if any, of the insulating or sheathing compounds.
If the test is carried out at ambient temperature, the test pieces shall be kept for at least 3 h at a temperature of (23 ± 5) °C.
6 Test temperature
Unless otherwise specified, tests shall be carried out at ambient temperature.
7 Median value
When several test results have been obtained and ordered in an increasing or decreasing succession, the median value is the middle value if the number of available values is odd, and is the mean of the two middle values if the number is even.
8 Methods for determining the density
8.1 Suspension method (general method)
8.1.1 Testing materials and equipment
1) Ethanol (ethyl-alcohol) of analytical grade or another suitable liquid for densities below
1 g/ml.
2) Zinc chloride solution for densities equal to or greater than 1 g/ml.
3) Distilled or deionized water.
4) Mixing cylinder.
5) Thermostat.
6) Hydrometer calibrated at (23,0 ± 0,1) °C.
7) Thermometer graduated in tenths of a degree Celsius.
8.1.2 Procedure From the insulation or the sheath to be tested, a sample shall be taken perpendicularly to the conductor axis and cut into small pieces of 1 mm to 2 mm edge length. The density shall be determined by putting the sample in suspension in a liquid which does not react with the material to be tested.IEC 60811-1-3 pdf download.

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