ABB’s range of RCDs meets Standards Australia Wiring Rules amendments

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ABB series products

To address an increasing presence of earth faults, Standards Australia has made changes to its Wiring Rules.

Due to the increased adoption of renewables, electronics and emerging technologies (such as variable-speed drives, LED lighting, washing machines and tumble dryers), there has been an increasing presence of earth faults with direct current (DC) waveforms in addition to conventional sinusoidal earth faults, says a media release from ABB. This can cause a dangerous situation as these DC waveforms are unable to be detected by standard Type AC (alternating current) residual current devices (RCDs).

Type AC RCDs have commonly been used for more than 20 years, providing basic protection against electric faults and fire by detecting residual currents with a sinusoidal alternating current waveshape.

Standards Australia has implemented Amendment 2 of AS/NZS 3000:2018 CI to address the changing market requirements. The Amendment requires the use of RCDs that not only detect sinusoidal alternating current but also identify residual pulsating direct currents. Type AC RCD will no longer be permitted for sale or installation in Australia after 2 April 2023.

ABB says the local market needs to be fully prepared for the change this year, completing the necessary product transitions.

ABB’s range of Type A, Type F and Type B RCDs are fully compliant with the new requirement, says the release.


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