HD 626 is applicable for cables with a rated voltage of Uo/U(Um)=0,6/1(1,2) kV, mainly used in air power distribution systems for public distribution, with a maximum system voltage not exceeding 1,2 kV.
This section (Part 1) specifies the general requirements for these cables, unless specified otherwise in certain sections of this HD. Test methods are specified in HD 383, HD 405, EN 60811 and HD 605 or in Part 2 of this HD. Special cable types are specified in Sections 3 to 8.
The purposes of this Harmonization Document are:
Type Tests (Symbol T)
Testing required before providing a cable type covered by this HD on a general commercial basis to demonstrate satisfactory performance characteristics to meet the intended application. These tests have such a structure that they do not need to be repeated after they are made, unless changes are made in the cable material, design or production process that may change the performance characteristics.
Sample Tests(Symbol S)
Tests on completed cable samples or components from a completed cable to verify that the finished product meets design specifications.
Routine Tests ( Symbol R)
Tests on all production cable lengths to demonstrate compliance with requirements.
Test After Installation
Test aimed at demonstrating the integrity of the cable and its accessories as mounted.
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