IEC 62561-4:2010 pdf – Lightning protection system components(LPSG)-Part 4: Requirements for conductor fasteners
IEC 62561-4:2010 pdf – Lightning protection system components(LPSG)-Part 4: Requirements for conductor fasteners.
5.3 Mechanical strength
5.3.1 Perp.ndlcular and axial loads
The design of the conductor fastener shall be such that it carries the perpendicular loads caused by the weight of the conductor, snow, ice and wind and axial loads caused by the thermal expansion—contraction of the conductor and its weight.
Compliance is checked following the manufacturers declaration for the classification of the conductor fastener in accordance with Clause 4 and by test specified in 6.4.1 and 6.4.2.
5.3.2 Impact tists
Conductor fasteners shall be so designed and constructed to withstand impact stresses caused accidentally.
Compliance is checked by test specified in 6.4.3.
5.4 Installation instructions
The manufacturer or supplier of the conductor fastener shall provide adequate information in his literature to ensure that the installer can select and install the component in a suitable and safe manner, in accordance with IEC 62305-3.
Compliance is checked by inspection in accordance with 6.5.
Each conductor fastener shall be marked with
— the manufacturers or responsible vendor’s name or logo or trademark,
— product identification or type.
Where It Is not possible to make these marks directly onto the product, they shall be made on the sn,allest supplied packaging.
NOTE Marking may b. applied tar example by moulding. pressing, engraving, pnnhng adhesiv, labels or waler slide lranalefs
Compliance is checked in accordance with 6.6,
6.1 General test conditions
Tests specified in this standard are type tests These tests are of such a nature that, after they have been performed, they need not be repeated unless changes are made to the materials, design or type of manufacturing process, which might change the performance charactenstics.
The standard cannot cover all possible types of conductor fasteners and the way of fixing them on various surfaces of different materials. When required, for these applications. agreement should be obtained between the test engineer and manufacturer on the specific testing regime.
Unless otherwise specified, tests are carried out with the specimens assembled and installed as in normal use specified in the manufacturers or supplier’s instructions, with the recommended conductor materials, sizes and the tightening torques.
The tests shall be carried out in the sequence given after environmental tests of the specimenin accordance with 6.3.
Unless otherwise specified，12 metallic or 18 composite/non metallic specimens are subjectedto the tests and the requirements are satisfied if aill the tests are met.
lf only one of the specimens fails to satisfy a test due to a manufacturing fault,that test andany preceding one ‘which may have influenced the results of the test shall be repeated andalso the tests which follow shall be made in the same required sequence on another full set ofsamples, all of which shall comply with the requirements.
Tests for non-metallic conductor fasteners shall not commence earlier than 168 h from thetime of their manufacturing.
A torque meter shall be used for all tightening operations. lt shall have a resolution of at least0,5 Nm and an accuracy of 土4 %or less.
The applicable tolerance for any applied mechanical load shall be within ± 5 %.
NOTE The applicant, when submitting the first set of samples , may also submit an additional set of samples thatmay be necessary should one sample fail.The testing labor atory shall then,without further request,test the
submitted at the same time,a fallure of one sample shall entaill rejection.
additional set of samples，and shall only reject if a further failure occurs. If the additional set of samples is not
6.2 Preparation of the specimen
lf not otherwise specified by the manufacturer，the conductors and specimens shall becleaned by using a suitable degreasing agent followed by cleaning in demineralized water anddrying. They shall then be assembled in accordance with the manufacturer’s installationinstructions,e.g. with the recommended conductors and the tightening torques.
The tightening torque should be applied in a steady and uniform manner.
Any conductor fastener accommodating conductors with differences in size (diameter,thickness and width) equal to or less than 2 mm shall be tested using the minimum conductorsize recommended. lf the range is greater than 2 mm, the conductor fastener shall be testedusing the minimum and maximum of conductor sizes.
6.3Environmental influence test
In order that a conductor fastener meets the requirements of this standard，environmentaltests shall be carried out according to Annex A and/or Annex B.