Standards

This international standard is applicable to a.c. circuit-breakers designed for indoor or outdoor installation and for operation at frequencies of 50 Hz and 60 Hz on systems having voltage above 1 000 V.

This part of IEC 62271 mainly applies to a.c. circuit-beakers within the scope of IEC 62271 - 100 . It provides the general rules for testing a.c. circuit- breakers, for making and breaking capacities over the range of test duties described in 6 102 to 6. 111 of IEC 62271 -100. by synthetic methods..

This part of IEC 62271 applies to three-pole units for public and industrial distribution systems which are functional assemblies of switches including switch - disconnections and current limiting fuses designed so as to be capable of - breaking at the rated recovery voltage and current up to and including the rated short- circuit breaking current.

This part of IEC 62271applies to three-pole operated units for distribution systems that are functional assemblies of a circuit - switcher and current liming fuses designed so as to be cables of - breaking at the rated recovery voltage, any load or fault current up to and including the rated short- circuit breaking current . - making at the rate voltage, circuits to which the rated short -circuit breaking current applies.

This part of the IEC 62271 applies to high-voltage alternating current disconnecting circuit-breakers for operation at frequencies of 50 Hz and 60 Hz on systems having voltages of 72. 5 kV and above. This standard identifies which requirements of IEC 60694, IEC 62271-100 and IEC 62271-102 standards are applicable . It also gives the additional requirements specific to these devices.

This publicity available specification is applicable to a.c. series capacitor by-pass switches designed for outdoor installation and for operation at frequencies of 50 Hz and 60 Hz on systems having voltages above 1 000 V . It is only applicable to by-pass switches for use in three -phase systems.

This International standard is applicable to a.c. circuit-breakers designed for indoor or outdoor installation for operation at frequencies of 50 Hz on systems having voltages above 1000v and applied for inductive current switching with or without additional short-circuit current breaking duties. The standard is applicable to circuit- breakers in accordance with IEC 62271-100 that are used to switch high-voltage motor currents and shunt reactor current and also to high-voltage contactors used to switch high-voltage motor currents.

This standard applies to all overhead , pad -mounted, dry and submersible single-or multiple alternating current automatic reclosers and fault interrupters for rate maximum voltages above 1000 V and u to 38 kV.

This part of IEC 62271 specifies requirements for factory - assembles metal- enclosed switchgear and control gear for alternating current of rated voltages above 1 kV and up to and including 52 k V for indoor and outdoor installation, and for service frequencies up to and including 60 Hz Enclosures may include fixed and removable components and may be filled with fluid (liquid or gas) to provide insulation.

This standard specifies requirements for gas-insulated, metal-enclosed switchgear in which the insulation is obtained, at least partly , by an insulting gas other than air at atmospheric pressure, for alternating current of rated voltage above 52 kV, for indoor and outdoor installation, and for services frequencies up to and including 60 Hz.