Rechercher

Applies to lever switches for use in electronic and electromechanical equipment, including switches necessary to connect the supply mains. Switches covered by this standard have a maximum rated voltage not exceeding 500 V and a maximum rated current not exceeding 25 A (d.c. or a.c. r.m.s. values). Establishes uniform specifications and type test requirements for lever switches also establish…

Gives technical requirements for tubular fluorescent lamps with preheated cathodes for general lighting service, operated with or without a starter from a.c. mains, also describes tests for the lamps with non-preheated cathodes operated without the use of a starter. Gives testing methods to be used for checking quality and interchangeability for type testing, for individual lamp batches or for a…

This standard relates to special requirements applicable to sub-miniature fuse-links adapted to printed circuits and used for the protection of electric appliances, electronic equipment and component parts thereof, normally intended to be used indoors. This standard also applies to the requirements of IEC 127-1.

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…

Gives standard conditions of measurement and methods of measuring the characteristics common to sub-systems of terrestrial line-of-sight radio-relay systems and to simulated radio-relay systems using frequency modulation. The tests described are limited to analogue transmission systems. Standardizes the conditions and methods of measurement to be used to ascertain the performance of terrestrial…

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.…

These requirements cover the test procedure for the performance evaluation of ceiling firestop flap assemblies which may or may not be part of an air diffusion device, intended for use in fire resistive floor-ceiling and roof-ceiling assemblies.

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.

Applies to alternating current disconnectors and earthing switches, designed for indoor and outdoor installation, for voltages above 1000 V and for service frequencies up to and including 60 Hz. This standard also applies to the operating devices and the auxiliary equipment.