The AS/NZS 61439 standard, which has been in effect in Australia and New Zealand since May 2021, introduces crucial revisions to the guidelines for low-voltage switchgear and controlgear. This new standard, derived from the international IEC 61439 standard and tailored for the regional context, replaces older standards that had been in place for nearly two decades. Here’s a closer look at what this means for businesses, including potential compliance burdens, real-world benefits, and how it addresses core safety and operational concerns.
Key Updates in AS/NZS 61439
Temperature Rise Testing
One significant update is the strict regulation on temperature rise. The new standard mandates temperature rise limits for copper busbars, terminals and other compoennts in switchboards. This change aims to extend the service life of equipment and reduce overheating, thus enhancing safety and minimizing fire risk.Short Circuit Testing
Short circuit fauls, which can cause serious injuries and equipment damage, are a major focus of the new standard. The AS/NZS 61439 increases rigorous testing requirements for short circuit faults. In the new standard, short circuit testing must be completed for the assembly as a whole, where as previous standards allowed the testing of individual components.Impact on Business
Compliance and Costs
For manufacturers and assemblers, the AS/NZS 61439 standard means more rigorous testing and verification processes. This can lead to increased costs due to more extensive testing and compliance measures. However, these costs are offset by the production of higher-quality, safer switchgear.Safety and Reliability
From an end-user perspective, the enhanced safety measures translate into greater assurance of equipment reliability and performance over time. The new standards are designed to address previous inadequacies and promote better operational efficiency and safety.Switchboard Upgrades and Replacements
While new switchboards must be compliant with the new standard, existing switchboards which were compliant at the time of installation do not need to be replaced. However, if upgrade work is being carried out on a switchboard which is not considered a repair then the work must be compliant to AS/NZS 61439. This is be very difficult to do in most cases and would often require a switchboard replacement. In some cases the exisiting switchboard can be verified to the new standard, however this is very much a case by case basis often not possible. Get in contact with us if this is somehting that you need to discuss.The AS/NZS 61439 standard represents a substantial advancement in the safety and reliability of low-voltage switchgear. Although it introduces a higher compliance burden for switchboard manufacturers, the benefits include improved safety, reduced risk of equipment failure, and longer-lasting performance. Businesses should embrace these standards as a baseline while striving for continuous improvements to ensure long-term success and safety.
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