Distribution transformers
Distribution transformers convert high voltage electricity from the national grid into usable voltage levels for home and business use.
Single- and three-phase, dry, and oil-immersed transformers with a power rating between 10kVA and 2500kVA, which are designed for 11kV and 22kV networks, must meet minimum energy performance standards (MEPS).
Importers and manufacturers may not sell distribution transformers unless they are tested and comply with the Energy Efficiency (Energy Using) Regulations 2002.
A public consultation on a possible revision to the MEPS for distribution transformers was held in early 2011.
Regulatory requirements
There are steps you must take to meet the requirements of the Energy Efficiency (Energy Using Products) Regulations 2002.
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Standards
MEPS requirements are set out in AS 2374.1.2. Current test specifications are set out in AS 2375 for dry type, and AS 2374.1 for other type transformers. From 1 April 2013 more recent test standards will apply. AS 60076.11:2006 will be required for dry type transformers, and AS 60076.1:2005 for other transformers. These standards are available from www.saiglobal.com.
Scope and exclusions to Standard
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Upcoming work
Distribution transformers sold in New Zealand have been subject to MEPS since 2003, and high efficiency levels are currently voluntary. However, it is proposed that MEPS increase in stringency around October 2013.
MEPS for wind energy network transformers
33 kV networks are to be included in the proposed MEPS for distribution transformers in Australia and New Zealand. EECA has been working with suppliers on the efficiency levels in the standard AS 2374. This covers single- and three-phase, dry, and oil-immersed transformers with a power rating between 10kVA and 2500kVA.
The MEPS is planned for around October 2013, once the revised standard is published. Consultation was in January 2011 on a Regulatory Impact Statement or cost benefit analysis.
For further information, please email regs@eeca.govt.nz.
