IEC 60855-1 pdf free download

IEC 60855-1 pdf free download.Live working – Insulating foam-filled tubes and solid rods – Part 1: Tubes and rods of a circular cross-section.
For all type tests, environmental conditions in the test room shall comply with the normal atmospheric conditions provided in Table 2 of lEG 60212:2010, at a temperature of between 15 00 and 35 °C, with a relative humidity between 25 % and 75 % (taking into account Note 4 of Table 2 of IEC 60212:2010).
Nevertheless, for the electrical test the atmospheric conditions shall be at temperature between 18 °C and 28 00, with a relative humidity between 45 % and 75 %.
This part of lEG 60855 covers foam-filled tubes and solid rods for use at temperatures between —25 °C and +55 °C and at a relative humidity between 20 % and 93 %. For foam- filled tubes and solid rods intended to be used in unusual atmospheric conditions (higher or lower temperatures, higher relative humidity), the tests should be more restricting and be carried out in appropriate conditions.
Unless otherwise specified, for all type tests, the tolerance on the dimensions shall be
±0,5%.
When a visual check is specified, it shall be understood to be a visual check by a person with normal or corrected vision without additional magnification.
5.2.2 Groups and test pieces
The manufacturer shall supply lengths of foam-filled tubes and solid rods to provide the following groups of test pieces. For each test piece of every group the corresponding length shall be cut at least to 0,1 m from the end of the initial length of solid rod or foam-filled tube provided by the manufacturer.
Group 1: three test pieces of 0,3 m.
Group 2: three test pieces of 1,2 m.
Group 3: three test pieces of 2,5 m in case of foam-filled tube and 2 m in case of solid rod.
Group 4: three test pieces of 1,2 m.
Group 5: (for foam-filled tubes only): three test pieces of length equal to three times the external diameter ± 5 %.
Group 6: three test pieces of 2,5 m.
Group 7: three test pieces of (100 ± 5) mm.
One length of 2 m shall be kept as a reference specimen.
The equipment used to cut the test pieces shall not leave any trace of overheating on the cross-section. The cut shall be clean, showing no signs of tearing of the fibres and shall be made perpendicular to the axis of the foam-filled tube and solid rod.
5.3 Visual and dimensional checks
5.3.1 General
These checks shall be carried out to ensure that the general requirements are fulfilled and that the dimensions comply with the specifications.
5.3.2 Visual check
Initial lengths and test pieces shall be checked visually to verity the elements of marking, the packaging and to detect constructional defects.
There are two levels of inspection to detect constructional defects:
a) A first visual check shall be carried out on each of the initial lengths of foam-filled tube and solid rod provided by the manufacturer before the test pieces are cut from them. This is to detect any surface defects such as obviously faulty bonding between the fibre and the resin, voids underneath the varnish, foreign bodies, protrusions, dirt, bumps or scratches and absence of marks. Any defect shall result in rejection of the initial length.
b) A second visual check shall be carried out on each of the test pieces after they have been cut. This is to detect any internal defects around the visible part of the cross-section, and more particularly, any signs of detachment between the foam and the resin, and foam of poor quality (voids, cracks). Any such defect shall result in rejection of the test piece.
5.3.3 Dimensional check
The purpose of the dimensional check is to verify that diameters comply with the marking, and
the tolerances comply with the requirements of 4.4.
The dimensional check shall be carried out on each of the initial lengths, before the test pieces are cut from them, at both ends and in the middle. The difference between any two measured diameters of a given length shall be less than 0,5 mm.
5.4 ElectrIcal tests
5.4.1 General
Unless otherwise stated, tests shall be carried out using an AC power source at power frequency in accordance with the requirements given in lEG 60060-1. Measuring systems shall comply with IEC 60060-2 unless otherwise specified.IEC 60855-1  pdf download.