IEC 61439-1 lays down the general definitions and service conditions, construction requirements, technical characteristics and verification requirements for low-voltage switchgear and control gear assemblies.
IEC 61439-1 applies to assemblies only when required by the relevant standard:
– assemblies for which the rated voltage does not exceed 1 000 V AC or 1 500 V DC,
– assemblies designed for a nominal frequency of the incoming supply or supplies not exceeding 1 000 Hz,
– assemblies intended for indoor and outdoor applications,
– stationary or movable assemblies with or without an enclosure,
– assemblies intended for use in connection with the generation, transmission, distribution and conversion of electric energy, and for the control of electrical energy-consuming equipment.
IEC 61439-1 does not apply to individual devices and self-contained components. These can be motor starters, fuse switches, power electronic converter systems and equipment, switch mode power supplies, uninterruptable power supplies, basic drive modules, complete drive modules, adjustable speed power drive systems and other electronic equipment.
IEC 61439-1 describes the integration of devices and self-contained components into an assembly or an empty enclosure forming an assembly. For some applications involving, for example, explosive atmospheres, and functional safety, there can be a need to comply with the requirements of other standards or legislation in addition.
The international standard has been approved in Europe as EN IEC 61439-1:2021 without any changes and it supersedes EN 61439-1:2011.
