FOREWORD
SECTION 1: GENERAL
Clause
1 Scope
2 Normative references
3 Definitions
SECTION 2: INSULATORS
4 Insulator classes and type
5 Insulating materials
6 Specified characteristics and features of a d.c.
   insulator unit
7 Identification of insulators
SECTION 3: CLASSIFICATION OF TESTS, SAMPLING RULES AND
           PROCEDURES
8 Classification of tests
9 Quality assurance
10 Procedures for type and sample tests
SECTION 4: TEST PROCEDURES FOR ELECTRICAL TESTS
11 General requirements for high-voltage tests
12 Standard atmospheric conditions and correction
   factors for electrical tests
13 Mounting arrangements for electrical tests
14 Lightning impulse voltage tests
15 Dry d.c. voltage tests
16 SF6 puncture withstand test
17 Impulse overvoltage puncture withstand test
18 Ion migration test
19 Electrical body resistance test
20 Thermal runaway test
21 Routine electrical test
SECTION 5: TEST PROCEDURES FOR MECHANICAL AND OTHER
           TESTS
22 Verification of the dimensions
23 Electromechanical failing load test
24 Mechanical failing load test
25 Thermal-mechanical performance test
26 Residual mechanical strength test
27 Verification of the axial, radial and angular
   displacements
28 Verification of the locking system
29 Temperature cycle test
30 Thermal shock test
31 Porosity test
32 Galvanizing test
33 Routine visual inspection
34 Routine mechanical test
35 Zinc sleeve test
36 Zinc collar test
SECTION 6: TESTS ON STRING INSULATOR UNITS
37 General
Annexes
A - Method of comparison of the results of the
    electromechanical or mechanical failing load type
    and sample tests
B - Bibliography