IEC 61439-2 pdf download.Low-voltage switchgear and controlgear assemblies – Part 2: Power switchgear and controlgear assemblies
1 Scope
NOTE 1 Throughout this part, the abbreviation PSC-ASSEMBLY (see 3.1 .1 01 ) is used for a power switchgear and controlgear ASSEMBLY. This part of IEC 61 439 defines the specific requirements of power switchgear and controlgear assemblies ( PSC-ASSEMBLIES) as follows : – ASSEMBLIES for which the rated voltage does not exceed 1 000 V in case of a.c. or 1 500 V in case of d.c.; – stationary or movable ASSEMBLIES with or without enclosure; – ASSEMBLIES intended for use in connection with the generation, transmission, distribution and conversion of electric energy, and for the control of electric energy consuming equipment; – ASSEMBLIES designed for use under special service conditions, for example in ships and in rail vehicles provided that the other relevant specific requirements are complied with; NOTE 2 Supplementary requirements for ASSEMBLIES in ships are covered by IEC 60092-302. – ASSEMBLIES designed for electrical equipment of machines. Supplementary requirements for ASSEMBLIES forming part of a machine are covered by the IEC 60204 series. This standard applies to all ASSEMBLIES whether they are designed, manufactured and verified on a one-off basis or fully standardised and manufactured in quantity. The manufacture and/or assembly may be carried out other than by the original manufacturer (see 3.1 0.1 ). This standard does not apply to individual devices and self-contained components, such as motor starters, fuse switches, electronic equipment, etc. which will comply with the relevant product standards.This standard does not apply to the specific types of ASSEMBLIES covered by other parts of IEC 61 439. For ASSEMBLIES not covered by other parts this part applies.
3 Terms and definitions
This clause of Part 1 is applicable except as follows. 3.1 General terms Additional definitions: 3.1 .1 01 power switchgear and controlgear assembly PSC-ASSEMBLY low-voltage switchgear and controlgear assembly used to distribute and control energy for all types of loads, intended for industrial, commercial and similar applications where operation by ordinary persons is not intended NOTE It is not excluded for a PSC-ASSEMBLY to be located in an area accessible to ordinary persons. 3.1 .1 02 test situation condition of a PSC-ASSEMBLY or part of it in which the relevant main circuits are open on its supply side but not necessarily isolated whilst the associated auxiliary circuits are connected, allowing operation tests of the incorporated devices 3.1 .1 03 form of internal separation classification of physical separation within a PSC-ASSEMBLY 3.2 Constructional units of ASSEMBLIES Replacement of the title: 3.2 Constructional units of PSC – ASSEMBLIES Additional definitions: 3.2.1 01 withdrawable part removable part intended to be moved from the connected position to the isolated position and to a test position, if any, whilst remaining mechanically attached to the PSC-ASSEMBLY 3.2.1 02 test position position of a withdrawable part in which the relevant main circuits are open on its supply side but not necessarily isolated and in which the auxiliary circuits are connected allowing operation tests of the incorporated devices, the withdrawable part remaining mechanically attached to the PSC-ASSEMBLY NOTE The opening may also be achieved without any mechanical movement of the withdrawable part by operation of a suitable device.3.2.1 03 isolated position position of a withdrawable part in which an isolating distance is established in main and auxiliary circuits on its supply side, the withdrawable part remaining mechanically attached to the PSC-ASSEMBLY NOTE The isolating distance may also be established without any mechanical movement of the withdrawable part by operation of a suitable device. 3.2.1 04 isolating distance (of a withdrawable part) clearance between open contacts meeting the safety requirements specified for disconnectors [IEC 60050-441 :1 984, 441 -1 7-35, modified] Addition: 3.1 01 Electrical connections of functional units 3.1 01 .1 disconnectable connection connection which is connected or disconnected by manual operation of the connecting means without a tool 3.1 01 .2 withdrawable connection connection which is connected or disconnected by bringing the functional unit into the connected or isolated position 3.1 02 Gangways within PSC-ASSEMBLIES 3.1 02.1 operating gangway within a PSC-ASSEMBLIES space to be used by the operator for the proper operation and supervision of the PSC- ASSEMBLY 3.1 02.2 maintenance gangway within a PSC-ASSEMBLIES space which is accessible to authorized personnel only and primarily intended for use when servicing the installed equipment
IEC 61439-2 pdf download
