IEC 61952:2008

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviations
5 Identification
6 Environmental conditions
7 Transport, storage and installation
8 Tolerances
9 Classification of tests
   9.1 Design tests
   9.2 Type tests
   9.3 Sample tests
   9.4 Routine tests
10 Design tests
   10.1 General
   10.2 Test specimens for IEC 62217
        10.2.1 Tests on interfaces and connections of end fittings
        10.2.2 Tracking and erosion test
        10.2.3 Tests on core material
   10.3 Product specific pre-stressing for IEC 62217 tests on
        interfaces and connections of end fittings
        10.3.1 Thermal-mechanical pre-stressing
   10.4 Assembled core load tests
        10.4.1 Test for the verification of the maximum design
               cantilever load (MDCL)
        10.4.2 Tensile load test
11 Type tests
   11.1 Electrical tests
        11.1.1 Vertical mounting arrangement
        11.1.2 Horizontal mounting arrangement
   11.2 Mechanical tests
        11.2.1 Cantilever failing load test
12 Sample tests
   12.1 General rules
   12.2 Verification of dimensions (E1 + E2)
   12.3 Galvanizing test (E1 + E2)
   12.4 Verification of the SCL (E1)
        12.4.1 Test procedure
        12.4.2 Acceptance criteria
   12.5 Re-testing procedure
13 Routine tests
   13.1 Tensile load test
   13.2 Visual examination
Annex A (informative) Notes on the mechanical loads
        and tests
Annex B (informative) Determination of the equivalent
        bending moment caused by combined loads
Bibliography

IEC 61952:2008 applies to composite line post insulators consisting of a load-bearing, cylindrical, insulating solid core made up of fibres - usually glass - in a resin-based matrix, a housing (outside the insulating core) made of elastomer material (e.g. silicone or ethylene-propylene) and end fittings permanently attached to the insulating core. The object of this standard is to
- define the terms used,
- prescribe test methods,
- prescribe acceptance or failure criteria.
This standard does not include requirements dealing with the choice of insulators for specific operating conditions. This edition includes the following significant technical changes with respect to the previous edition:
- removal of tests procedures now given in IEC 62217;
- inclusion of clauses on tolerances, environmental conditions, transport, storage and installation;
- changes in the parameters determining the need to repeat design and type tests; and
- modification of the specification of load application in bending tests to simplify testing.