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This standard is divided into five sections, each dealing with a specific example of standardized fuse for use by authorized persons: Section I: Fuses with fuse-links with blade contacts. Section II: Fuses with fuse-links for bolted connections. Section III: Fuses with fuse-links having cylindrical contact caps. Section IV: Fuses with fuse-links with offset blade contacts. Section V: Fuses with…

Specifies four standard designs of starting performance of single speed three-phase cage induction motors for direct on-line or star-delta starting and rated on the basis of duty-type S-1 (maximum continuous rating). Also covers dual voltage motors in so far as the flux saturation level is the same for both voltages.

1. Scope 1.1 This standard applies to centrifugal pumps that require a driver-rated output of 373 W (1/2 hp) nominal up to and including 7.46 kW (10 hp) nominal. 1.2 This Standard specifies the method for testing centrifugal pumps to determine the following characteristics: (a) the total head produced by the pump versus the pump rate of flow; (b) input power versus pump rate of flow; and (c)…

1 PURPOSE AND SCOPE This standard specifies requirements with respect to the physical, mechanical and dimensional characteristics of ductile-iron pipe intended for use in water pressure piping systems of diameters 75 mm through 1600 mm for bell and spigot-joint pipe and flanged-joint pipe, and diameters 75 mm through 600 mm for mechanical-joint pipe, as well as test methods applying to…

This international Standard defines terms of the possible imperfections in oxyfuel gas, laser beam and plasma cuts in metallic materials which are collected and grouped. Imperfections are irregularities or deviations from the specified shape and location of cut. This international Standard only includes imperfections originating directly from oxyfuel gas, laser beam and plasma arc cutting; any…

This standard is concerned with conducted disturbances in the frequency range from 0 kHz to 9 kHz, with an extension up to 148,5 kHz specifically for mains signalling systems. It gives compatibility levels for public low voltage a.c. distribution systems having a nominal voltage up to 420 V, single-phase or 690 V, three-phase and a nominal frequency of 50 Hz or 60 Hz. Compatibility levels are…

This International Standard describes by pictorial representation most of the more common terms, in English, French and German, for types of joints, joint preparation and welds. This International Standard can be used on its own or in conjunction with other similar standards. NOTE 1 The figures in this International Standard are only sketches that have been drawn to illustrate the typical…

This International Standard specifies the safety requirements of a two-hand control device and the dependency of the output signal from the input signals. It describes the main characteristics of two-hand control devices for the achievement of safety and sets out combinations of functional characteristics for three types. It does not apply to devices intended to be used as enabling devices, as…

This International Standard specifies an empirical test procedure for assessing the resistance of a coating of paint, varnish or related product to cracking and/or detachment from a metal or plastic substrate when subjected to bending round a cylindrical mandrel under standard conditions. For a multicoat system, each coat may be tested separately or the complete system may be tested. The method…

IEC 61811-51:2002 Is a blank detail specification applicable to electromechanical all-or-nothing telecom relays of assessed quality. Selects the appropriate methods of test to be used in detail specifications and contains basic test schedules to be used in the preparation of such specifications.