BS EN 62155:2003

1 Scope and object
   1.1 General
   1.2 Hollow insulators or hollow insulator bodies
        intended for general use
   1.3 Ceramic hollow insulators intended for use with
        permanent gas pressure
2 Normative references
3 Terms and definitions
4 Insulating materials
5 General recommendations for design
   5.1 General recommendations for design of hollow insulators
        and hollow insulator bodies intended for general use
   5.2 Design rules for hollow insulators and hollow insulator
        bodies for use with permanent gas pressure
6 Classification of the tests, sampling rules and procedures
   6.1 Classification of the tests
   6.2 Relevant tests for type, sample and routine tests
   6.3 Hollow insulator or hollow insulator body selection
   6.4 Retest procedure for sample tests
   6.5 Quality assurance
7 General test procedures and requirements
   7.1 Verification of the dimensions and roughness of ground
        surfaces
   7.2 Mechanical failing load tests
   7.3 Temperature cycle test
   7.4 Porosity test
   7.5 Galvanizing test
8 Type tests
   8.1 Tests
   8.2 Pressure test
   8.3 Bending test
9 Sample tests
   9.1 Tests for hollow insulators or hollow insulator bodies
        intended for general use
   9.2 Tests for ceramic hollow insulators or hollow insulator
        bodies intended for use with permanent gas pressure
10 Routine tests
   10.1 Tests for hollow insulators or hollow insulator bodies
        intended for general use
   10.2 Tests for ceramic hollow insulators or hollow insulator
        bodies intended for use with permanent gas pressure
   10.3 Routine visual inspection
   10.4 Electrical routine test
   10.5 Routine mechanical tests for hollow insulators or hollow
        insulator bodies intended for general use
   10.6 Routine mechanical tests for ceramic hollow insulators
        or hollow insulator bodies intended for use with permanent
        gas pressure
   10.7 Routine thermal shock test
11 Documentation
   11.1 Marking
   11.2 Records
Annex A (informative) Methods of testing for tolerances of
                      parallelism, coaxiality, eccentricity,
                      angular deviation, camber and shed angle
                      of hollow insulators or hollow insulator
                      bodies
Annex B (informative) Methods for bending tests of hollow insulator
                      bodies
Annex C (informative) Alternative test method for the temperature-
                      cycle test
Annex D (informative) Bending moment equivalent to the design
                      pressure
Annex ZA (normative) Normative references to international
                      publications with their corresponding
                      European Publications
Annex ZB (informative) A-deviations
Bibliography

Applies to ceramics and glass hollow insulators intended for general use in electrical equipment and ceramic hollow insulators intended for use with a permanent gas pressure in switchgear and controlgear.

1.1 General This standard is applicable to ceramic and glass hollow insulators intended for general use in electrical equipment; ceramic hollow insulators intended for use with a permanent gas pressure in switchgear and controlgear. These insulators are intended for indoor and outdoor use in electrical equipment, operating on alternating current with a rated voltage greater than 1 000 V and a frequency not greater than 100 Hz or for use in direct-current equipment with a rated voltage of greater than 1 500 V. The hollow insulators are intended for use in electrical equipment, for example: circuit-breakers, switch-disconnectors, disconnectors, earthing switches, instrument transformers, surge arresters, bushings, cable sealing ends, capacitors. It is not the object of this standard to prescribe dielectric type tests because the withstand voltages are not characteristics of the hollow insulator itself but of the apparatus of which it ultimately forms a part. 1.2 Hollow insulators or hollow insulator bodies intended for general use Hollow insulators or insulator bodies of ceramic material or glass, intended for use without pressure; with permanent pressure ≤50 kPa gauge; with permanent gas pressure >50 kPa gauge in combination with an internal volume < 1 l (1 000 cm3); with permanent hydraulic pressure. The object of this standard is to define the terms used; the mechanical and dimensional characteristics of hollow insulators and hollow insulator bodies; the electrical soundness of the wall; the conditions under which the specified values of these characteristics are verified; the methods of test; the acceptance criteria. 1.3 Ceramic hollow insulators intended for use with permanent gas pressure Hollow insulators or hollow insulator bodies with their fixing devices, intended for use with permanent gas pressure: permanent gas pressure >50 kPa gauge in combination with an internal volume ≥1 l (1 000 cm3). NOTE 1 The gas can be dry air, inert gases, for example, SF6 or nitrogen or a mixture of such gases. The object of this standard is to define the terms used; the mechanical and dimensional characteristics of hollow insulators and hollow insulator bodies; the electrical soundness of the wall; the conditions under which the specified values of these characteristics are verified; the methods of test; the acceptance criteria; design rules; test procedures and test values. NOTE 2 Hollow insulators or hollow insulator bodies are usually integrated into electrical equipment which is electrically type tested as required by the equipment standard.