IEC 60455-3-8 pdf – Resin based reactive compounds used for electrical insulation – Part 3-8: Specifications for individual materials – Resins for cable accessories

IEC 60455-3-8 pdf – Resin based reactive compounds used for electrical insulation – Part 3-8: Specifications for individual materials – Resins for cable accessories
A resin is identified by a combination of categories, for example:. low voltage compound – soft: L-s
.low voltage compound – rigid, suitable for application in presence of water:L-R-W
Resins without specific information about application temperature are suitable for applications
between 5 °C and 40 “℃. Otherwise the application temperature shall be stated by themanufacturer on the packaging.
Tests for type testing are carried out in accordance with each of the resin categories.Low voltage:
0.6/1,0 (1,2) kV
Medium voltage:
20,8/36(42y kv
5Type testing
5.1General
Tests shall be carried out based on the category of the resins as defined in Table 1.These tests
are of such nature that,once successfully completed，they need not to be repeated unlesschanges are made in the material,component formulation or manufacturing process，whichmight change the performance characteristics.
5.2Sampling
Samples for type testing shall be taken from material stored under conditions specified by themanufacturer.The type testing of resins shall be carried out:
as a stand-alone test. Samples used for the type test shall be taken from material availableas agreed between supplier and user, or
in combination with an accessory type test.Samples used for the resins type test shall betaken from the same batch as used in the accessory type test. In the event that no material
from the same batch is available，then the samples used for the resins type test shall betaken from material available as agreed between supplier and user.
5.3 Preparation and conditioning
5.3.1General
For all tests，unless otherwise specified，conditioning shall be made in accordance withIEC 60212 using standard atmosphere B.
5.3.2lndividual components prior to mixing
Components (resin and reactive component) shall be individually prepared，conditioned andtested in accordance with the relevant test method as specified in stage 1 of the sequence of
tests given in Table 2 to Table 5. Filler, when supplied as a separate item, shall not be testedas a component
5.3.3Resin just after mixing (curing stage)
Compounds shall be prepared and mixed according to the supplier’s instructions and tested asspecified in stage 2 of the sequence of tests specified in Table 2 to Table 5.
5.3.4cured resin (original)
Compounds shall be prepared according to the supplier’s instructions and cured for 24 h atroom temperature unless otherwise specified in the test method referred to in stage 3 of thesequence of tests given in Table 2 to Table 5.The specimens shall be post-cured at(80 ±2)℃
for 24 h unless otherwise specified in the test method, and then cooled in a desiccator for 24 hat room temperature.
NOTElf degassing is needed，it will be indicated in the relevant test method and the condtions for the degassingwill also be indicated.
5.3.5cured resin after thermal ageing (dry and wet)
Cured resin shall be prepared according to the supplier’s instructions and cured for 24 h atroom temperature unless otherwise specified in the test method referred to in stage 4 of thesequence of tests given in Table 2 to Table 5. The specimens shall be post-cured at (80 ±2)℃
for 24 h unless otherwise specified in the test method, and then cooled in a desiccator for 24 hat room temperature.
NOTElf degassing is needed，it will be indicated in the relevant test method and the conditions for the degassingwill also be indicated.
5.4Sequence of tests
Tests shall be carried out on the resin in the following four stages, in accordance with Table 2to Table 5:
stage 1:Reactive components prior to mixing;stage 2:Resin just after mixing (curing stage);stage 3:Cured resin (original);
stage 4:Cured resin after heat exposure (dry and wet).5.5Test report
The test report shall include the following data:1) resin category and identification;
2) lot number or identification;
3) marking and labelling according to the material safety data sheet (MSDS);4)test results;
5) major test parameters, including conditioning and calibration, if any;6) processing conditions used to mix the compound;
7) copy of the technical data sheet (TDS) and MSDS.