Rechercher

Describes recognized thermal classes for the insulation of electrotechnical products. Considers the thermal evaluation of insulation materials and systems, their interrelationship and the influence of service conditions. Defines the responsibility for assigning thermal identification and classification.

Defines the mechanical and electrical requirements of copper alloy used for equipment wires.

Applies to string insulator units of the cap and pin and long rod types and their associated metal fittings for overhead lines. Includes six standard sizes designated by the nominal pin diameters which form the basis of the standard. Defines each standard size by the dimensions of the pin ball, of the socket and the hook-on 'Go' gauge. States dimensions of twin-balled pins for coupling…

Applies specifically to antennas used for transmitting and receiving in the mobile services. Defines terms and conditions of measurement used to ascertain the performance of antennas within the scope of this standard and makes possible a comparison of the results of measurements made by different observers on different equipment.

Applicable to locking devices used with ball and socket couplings of string insulator units and used with the corresponding metal fittings standardized in IEC 60120. -Defines the shapes and some standard dimensions for locking devices as well as the test methods for locking devices; -States the acceptance conditions for supply and gives other dimensions for guidance of manufacturing only.…

Gives methods for tests for thermosetting coating powders as defined in Sub-clause 3.7 of IEC 60455-1. These tests are for material before cure and in cured form. The contents of the corrigendum of August 1991 have been included in this copy.

Gives different methods of measuring air flow rate in an air handling duct which, without the need of calibration, meet various specific requirements in the field of air distribution and air diffusion. For the purpose of this standard an "air handling duct" is defined as a tight section of ductwork which cross-section may be circular or, excluding for Pitot-static tubes, rectangular.

Defines the characteristics of a 3.81 mm (0.150 in) magnetic tape cassette to provide data interchange and physical interchangeability between information processing systems utilizing the ISO 7-bit coded character set (ISO 646) and its extensions (ISO 2022). The cassette is of the twin hub coplaner type, loaded with 3.81 mm (0.150 in) wide magnetic tape for digital recording using the 31.5 bits…

1. Scope 1.1 This Standard defines the rules and requirements for periodic inspection of pressure-contaning components and their supports that form part of a nuclear power plant. 1.2 This Standard covers failure aspects, classification of areas subject to inspection, responsibilities, provision for access, inspection techniques and provision for access, inspection techniques and…

1. Scope 1.1 This standard describes the formats, rules, and procedures for the encoding of alphanumeric text and pictorial information for videotex and teletext¹ applications. (¹The term teletext (not yet adopted by CCIR) is commonly used to refer to a broadcast television videotex service. It is different from teletex, a term officially adopted by CCITT to define a specific type of…