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CERAMIC PRESSURIZED HOLLOW INSULATORS FOR HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR
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Superseded date: 02-09-2003
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Published date: 12-01-2013
Publisher: National Standards Authority of Ireland
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.Only cited Standards give presumption of conformance to New Approach Directives/Regulations.Dates of withdrawal of national standards are available from NSAI.
INTRODUCTION1 Scope and object2 Normative references3 Definitions4 General recommendations for design and construction 4.1 Purpose 4.2 Rules for design5 General requirements for tests 5.1 Classification of tests 5.2 General requirements for pressure tests 5.3 General requirements for bending tests6 Type tests 6.1 General 6.2 Pressure test 6.3 Bending test7 Sample tests 7.1 Selection and number of test pieces 7.2 Tests 7.3 Re-test procedure 7.4 Verification of dimensions 7.5 Control of the roughness of ground parts 7.6 Mechanical test (for assembled hollow insulators)8 Routine tests 8.1 General 8.2 Mechanical tests 8.3 Other tests9 Documentation 9.1 Marking 9.2 CertificatesAnnexesA (informative) Tolerances of form and positionB (informative) Bending moment equivalent to the designpressureC (informative) BibliographyZA Normative references to international publications withtheir corresponding European publications
Applies to hollow insulators made of ceramic material, with their fixing devices, intended for use with a permanent gas pressure greater than 50 kPa gauge having and internal volume equal to or greater than 1 L (1000 cm [3]).
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