IEC 61439-4 pdf download.Low-voltage switchgear and controlgear assemblies – Part 4: Particular requirements for assemblies for construction sites (ACS)
1 Scope
NOTE Throughout this standard, the abbreviation ACS (ASSEMBLY for construction site, see 3.1 .1 01 ) is used for a low-voltage switchgear and controlgear assembly intended for use on construction and similar sites. This part of 61 439 defines the specific requirements of ACS 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.; – ASSEMBLIES where the nominal primary voltage and the nominal secondary voltage of transformers incorporated in ACS are within the limits specified above; – ASSEMBLIES intended for use on construction sites, both indoors and outdoors, i.e. temporary places of work to which the public do not generally have access and where building construction, installation, repairs, alteration or demolition of property (buildings) or civil engineering (public works) or excavation or any other similar operations are carried out; – transportable (semi-fixed) or mobile ASSEMBLIES with enclosure. The manufacture and/or assembly may be carried out other than by the original manufacturer. 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 ASSEMBLIES for use in the administrative centres of construction sites (offices, cloakrooms, ASSEMBLY rooms, canteens, restaurants, dormitories, toilets, etc.). Requirements for electrical protection provided by equipment manufactured according to this International Standard are given in IEC 60364-7-704.
3 Terms and definitions
This clause of Part 1 is applicable except as follows: Additional terms: 3.1 General terms 3.1.1 01 low-voltage switchgear and controlgear assembly for construction sites ACS combination of one or several transforming or low voltage switching devices with associated control, measuring, signalling, protective and regulating equipment complete with all their internal electrical and mechanical connections and structural parts, designed and built for use on all construction sites, indoors and outdoors 3.2 Constructional units of ASSEMBLIES 3.2.1 01 metering unit functional unit equipped with apparatus for metering electrical energy 3.2.1 02 transformer unit functional unit consisting mainly of one or several transformers Modifications: 3.3 External design of ASSEMBLIES 3.3.1 open-type ASSEMBLY This term of Part 1 does not apply. 3.3.2 dead-front ASSEMBLY This term of Part 1 does not apply. Replacements: 3.3.3 enclosed ACS ACS which is enclosed on all sides with the possible exception of its mounting surface in such a manner as to provide a defined degree of protection 3.3.7 box-type ACS enclosed ACS intended: – either to be mounted on a vertical surface; – or to stand on a horizontal surface supported by feet or legs (articulated or not) or by a mounting not forming part of the ACS (see 3.4.2 of Part 1 ) Modifications: 3.5 Conditions of installation of ASSEMBLIES 3.5.1 ASSEMBLY for indoor installation This term of Part 1 does not apply (see 3.1 .1 01 ). 3.5.2 ASSEMBLY for outdoor installation This term of Part 1 does not apply (see 3.1 .1 01 ). 3.5.3 stationary ASSEMBLY This term of Part 1 does not apply. 3.5.4 movable ASSEMBLY This term of Part 1 does not apply. Additional terms: 3.5.1 01 transportable ACS semi-fixed ACS ACS intended for use in a place where it is not permanently fixed; its location may vary during work on the same site. When the equipment is to be moved to another place, it is first disconnected from the supply 3.5.1 02 mobile ACS ACS capable of being moved as work advances on the site, without being disconnected from the supply Additional terms: 3.1 01 Function of the ACS 3.1 01 .1 incoming supply function suitability for connection of the ACS either to electricity public supply network or to the transformer substation or to on site generator 3.1 01 .2 metering function suitability for the metering of electrical energy consumed on the site
IEC 61439-4 pdf download
