scope:

NOTE 1 Throughout this standard, the term ASSEMBLY (see 3.1.1) is used for a low-voltage switchgear and controlgear assembly. This part of the IEC 61439 series lays down the general definitions and service conditions, construction requirements, technical characteristics and verification requirements for low303 voltage switchgear and controlgear assemblies. This standard cannot be used alone to specify an ASSEMBLY or used for a purpose of determining conformity. ASSEMBLIES shall comply with the relevant part of the IEC 61439 series; Parts 2 onwards. This standard applies to low-voltage switchgear and controlgear assemblies (ASSEMBLIES) only when required by the relevant ASSEMBLY standard 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 designed for a nominal frequency of the incoming supply(s) does not exceed 1000 Hz; - ASSEMBLIES intended for indoor and outdoor applications; - 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; 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 3.10.1).This standard does not apply to individual devices and self-contained components, such as motor starters, fuse switches, power electronic converter systems and equipment (PECS), switch mode power supplies (SMPS), uninterruptable power supplies (UPS), adjustable speed power drives systems (BDM/CDM/PDS), other electronic equipment, etc. which will comply with the relevant product standards. The relevant part of the IEC 61439 series applies to the integration of mechanical and electrical components (switching devices, PECS, SMPS, UPS, BDM/CDM/PDS, control devices, busbars, functional units, structural parts, etc.), into an ASSEMBLY. For some applications involving, for example, ATEX or functional safety, there may be a need to comply with the requirements of other standard or legislation in addition to those specified in the IEC 61439 series.