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, that are designed for 11kV and 22kV networks, must meet minimum energy performance standards.
Importers and manufacturers may not sell distribution transformers unless they are tested and comply with the Energy Efficiency (Energy Using) Regulations 2002.
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. Test specifications are set out in 2375 for dry type, and AS 2374.1 for other type transformers. Standard AS 2374.1.2-2003 is available from SAI Global.
Scope and exemptions 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 Minimum Energy Performance Standards (MEPS) be increased to the high efficiency levels in the next few years.
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.
A draft standard has been developed and we seek your comments as we are interested to know how the standard will affect the wind energy industry in NZ.
Download the draft MEPS for power transformers
The MEPS is planned for late 2011, following consultation on a Regulatory Impact Statement or cost benefit analysis (date of release yet to be determined).
For further information, please email regs@eeca.govt.nz.
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