INTRODUCTION
Section 1: General
1 Scope and object
2 Normative references
3 Definitions
    3.1 Insulator string
    3.2 Pin insulator
    3.3 Line post insulator
    3.4 Traction insulator
    3.5 Lot
    3.6 Flashover
    3.7 Dry lightning impulse withstand voltage
    3.8 50% dry lightning impulse flashover voltage
    3.9 Wet power-frequency withstand voltage
    3.10 Electromechanical failing load
    3.11 Mechanical failing load
    3.12 Puncture voltage
    3.13 Creepage distance
    3.14 Displacements
    3.15 Short standard string
    3.16 Specified characteristics
Section 2: Insulators
4 Classification, types of insulators and insulating
    materials
    4.1 Insulator classes
    4.2 Insulator types
    4.3 Insulating materials
5 Identification of insulators
Section 3: Classification of tests, sampling rules and
procedures
6 Classification of tests
    6.1 Type tests
    6.2 Sample tests
    6.3 Routine tests
7 Quality assurance
8 Procedures for type and sample tests
    8.1 Insulator selection for type tests
    8.2 Sampling rules and procedures for sample tests
    8.3 Re-test procedure for sample tests
Section 4: Test procedures for electrical tests
9 General requirements for high voltage tests
10 Standard atmospheric conditions and correction factors
    10.1 Standard reference atmosphere
    10.2 Correction factors for atmospheric conditions
11 Artificial rain parameters for wet tests
12 Mounting arrangements for electrical tests
13 Lightning impulse voltage tests (type test)
    13.1 Test procedure
    13.2 Acceptance criteria
14 Wet power-frequency voltage tests (type test)
    14.1 Test procedure
    14.2 Acceptance criteria
15 Puncture withstand test (sample test, for class B
    insulators only)
    15.1 Power-frequency puncture withstand test
    15.2 Impulse overvoltage puncture withstand test
16 Routine electrical test (only on class B insulators
    of ceramic material or annealed glass)
Section 5: Test procedures for mechanical and other tests
17 Verification of the dimensions (type and sample test)
18 Electromechanical failing load test (type and sample
    test)
    18.1 Test procedure
    18.2 Acceptance criteria
19 Mechanical failing load test (type and sample test)
    19.1 Test procedure for pin and line post insulators
    19.2 Test procedure for string insulator units
    19.3 Acceptance criteria for pin insulators
    19.4 Acceptance criteria for string insulator units
          and line post insulators
20 Thermal-mechanical performance test (type test)
    20.1 Test procedure
    20.2 Acceptance criteria
21 Verification of the axial, radial and angular
    displacements (sample test)
    21.1 Test procedure
    21.2 Acceptance criteria for cap and pin insulators
    21.3 Acceptance criteria for long rod insulators
22 Verification of the locking system (sample test)
    22.1 Conformity of the locking device
    22.2 Verification of locking
    22.3 Position of the locking device
    22.4 Procedure for the operation test
    22.5 Acceptance criteria for the operation test
23 Temperature cycle test (sample test)
    23.1 Test procedure for string insulator units,
          pin insulators and line post insulators composed
          of ceramic material
    23.2 Test procedure for string insulator units,
          pin insulators and line post insulators composed
          of annealed glass
    23.3 Special test procedure for insulators with thick
          sections or very large insulators
    23.4 Complementary specifications
    23.5 Acceptance criteria
24 Thermal shock test (sample test)
    24.1 Test procedure
    24.2 Acceptance criteria
25 Porosity test (sample test)
    25.1 Test procedure
    25.2 Acceptance criteria
26 Galvanizing test (sample test)
    26.1 Test procedures
    26.2 Acceptance criteria
27 Routine visual inspection
    27.1 Insulators with ceramic insulating parts
    27.2 Insulators with glass insulating parts
28 Routine mechanical test
    28.1 Routine mechanical test on line post insulators
    28.2 Routine mechanical test on string insulator units
29 Mounting arrangements fot tests on pin insulators
    29.1 Standard mounting arrangement for electrical
          tests
    29.2 Mounting arrangements for electrical tests
          reproducing service conditions
    29.3 Mounting arrangement for the mechanical failing
          load test
Section 7: Line post Insulators
30 Coefficient for statistical analysis of the test
    results on line post insulators
    30.1 Coefficient for type tests
    30.2 Coefficients for sample tests
31 Mounting arrangements for tests on line post
    insulators
    31.1 Standard mounting arrangement for electrical tests
    31.2 Mounting arrangements for electrical tests
          reproducing service conditions
    31.3 Mounting arrangement for the mechanical failing
          load test
Section 8: String Insulator units
32 Prescriptions concerning type tests on string insulators
    32.1 Electrical type tests on string insulators
    32.2 Mechanical type tests
33 Coefficients for statistical analysis of the test
    results on string insulators
    33.1 Coefficient for type tests
    33.2 Coefficients for sample tests
34 Mounting arrangements for electrical tests on string
    insulator units
Section 9: Insulators for overhead electric traction lines
35 Mounting arrangements for electrical tests on insulators
    for overhead electric traction lines
    35.1 Standard mounting arrangement
    35.2 Mounting arrangement representing service conditions
Figures
Annexes
A Method of comparison of the results of electromechanical
    or mechanical type and sample tests
B Illustration of the mechanical and electromechanical or
    mechanical type and sample tests
C List of normative documents given for information
ZA Normative references to international publications
    with their corresponding European publications
ZB (informative) A-deviations
Figure1-Schematic representation of the thermal-
mechanical performance test
Figure2-Measurement of axial and radial displacements
Figure3-Measurement of angular displacement
Figure4-Greatest thickness of the insulator
Figure B.1-Acceptance flow chart for mechanical or
electromechanical type tests
Figure B.2-Acceptance flow chart for mechanical
or electrochemical sample test
Figure B.3-Flow chart of the comparison of type and sample
test results
Table1-Cross-reference table for pin insulators
Table2-cross-reference table for line post insulators
Table3-Cross-reference table for string insulator units
TableB.1-Examples for mechanical or electromechanical
sample tests