IEC 60439/61439 Low-voltage Switchgear and Controlgear Assemblies

IEC 60439/61439 - The Series of Parts

The new IEC 61439 lays down the definitions and states the service conditions, construction requirements, technical characteristics as well as verification requirements and will replace the IEC 60439 series.

 

The new IEC 61439 standard applies to enclosures for which the rated voltage is under 1000 V AC (at frequencies not exceeding 1000 Hz) or 1500 V DC. The standard defines the design verified ASSEMBLIES and eliminates completely the categories TTA and PTTA. In order to conform to the standard, type tests have been replaced by a design verification which can be carried out by the three following equivalent and alternative methods: testing, alculation/measurement or application of design rules.


The IEC 61439 Standard is structured as follows:

IEC 61439-0: Low-voltage switchgear and controlgear assemblies - Part 0: Guide to specifying assemblies

IEC 61439-1: Low-voltage switchgear and controlgear assemblies - Part 1: General rules

IEC 61439-2: Low-voltage switchgear and controlgear assemblies - Part 2: Power switchgear and controlgear assemblies

IEC 61439-3: Low-voltage switchgear and controlgear assemblies - Part 3: Distribution boards intended to be operated by ordinary persons (DBO)


IEC 61439-4: Low-voltage switchgear and controlgear assemblies - Part 4: Particular requirements for assemblies for construction sites (ACS)

IEC 61439-5: Low-voltage switchgear and controlgear assemblies - Part 5: Assemblies for power distribution in public networks

IEC 61439-6: Low-voltage switchgear and controlgear assemblies - Part 6: Busbar trunking systems (busways)