Standards Australia releases new standard
New standard AS/NZS 61439, published in May 2016.
AS/NZS 61439 is the new series of standards for low voltage switchgear and is an adoption of IEC 61439 series with AS/NZS modifications.
The rapid changes in technology advancements, specifically new circuit breaker designs entering the market, coupled with changes to market demands has been the driving force behind this standards change.
There will be a five-year transitional period to replace the AS/NZS 3439:2002 series in 2021. It will be compulsory to comply through design and routine verification.
AS/NZS 61439.1 specifies three methods for verification, replacing TTA and PTTA; verification by testing, comparison with a tested design, or assessment.
- Verification by testing – this involves conducting type-tests proving the design fulfills the requirements of the standard.
- Verification by comparison with reference design – this is permissible only for temperature rise and short circuit verification by comparison with a type-tested design.
- Verification by assessment – this is permissible in some cases e.g. for temperature rise by calculation up to 630A and 1600A, form of internal separation, reference to manufacturers data in relation to incorporation of switching devices, electrical connections, terminals, resistance to abnormal heat and fire and UV radiation of insulating materials etc.
Low-voltage switchgear and controlgear assemblies General rules (IEC 61439-1, Ed. 2.0 (2011), MOD). To purchase the new standard from Standards Australia, click on the link below.