IEC 62155-2003 pdf – Hollow pressurized and unpressurized ceramic and glass insulators for use in electrical equipment with rated voltages greater than 1 000 V.
1 Scope and object 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 1 00 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 cm 3 ); – 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 cm 3 ). NOTE 1 The gas can be dry air, inert gases, for example, SF 6 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. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60672-3:1 997, Ceramic and glass insulating materials – Part 3: Specifications for individual materials IEC 60694:1 996, Common specifications for high-voltage switchgear and controlgear standards IEC 60865-1 :1 993, Short-circuit currents – Calculation of effects – Part 1: Definitions and calculation methods IEC 61 1 66:1 993, High-voltage alternating current circuit-breakers – Guide for seismic qualification of high-voltage alternating current circuit-breakers
IEC 62271 -1 00:2001 , High-voltage switchgear and controlgear – Part 100: High-voltage alternating-current circuit-breakers ISO 1 460:1 992, Metallic coatings – Hot dip galvanized coatings on ferrous metals – Gravimetric determination of the mass per unit area ISO 1 461 :1 999, Hot dip galvanized coatings on fabricated iron and steel articles – Specifications and test methods ISO 1 463:1 982, Metal and oxide coatings – Measurement of coating thickness – Micro- scopical method ISO 2064:1 996, Metallic and other inorganic coatings – Definitions and conventions concern- ing the measurement of thickness ISO 21 78:1 982, Non-magnetic coatings on magnetic substrates – Measurement of coating thickness – Magnetic method ISO 4287:1 997, Geometrical Product Specifications (GPS) – Surface texture: Profile method – Terms, definitions and surface texture parameters 3 Terms and definitions For the purposes of this document, the following definitions apply. NOTE Some of the definitions cited below are taken from IEC 60050(471 ), modified or unmodified. 3.1 hollow insulator body hollow insulating body, which is open from end to end, with or without sheds, not including the fixing devices or end fittings 3.2 hollow insulator hollow insulating part, which is open from end to end, with or without sheds, including the fixing devices or end fittings [IEV 471 -01 -1 7, modified] NOTE This is a general term which also covers the definitions 3.4, 3.5 and 3.6. 3.3 fixing device end fitting device forming part of a hollow insulator, intended to connect it to a supporting structure or to an item of equipment, or to another insulator NOTE Where the fixing device is metallic, the term “metal fitting” is also used. [IEV 471 -01 -02, modified]