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Proposed Standard for External Power Supplies (Australia)

Discussion in 'Hobby Electronics' started by Ross Herbert, Apr 10, 2007.

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  1. Ross Herbert

    Ross Herbert Guest

    Saw an ad in last Weekend Australian pointing to

    Without reading the full pdf document (2.1MB) the advert states that
    the proposed standard will apply only to external power supplies
    powered from the mains (230Vac) up to a max 250VA, and having a SINGLE
    elv output. After April 2008, products which don't meet the required
    standard cannot legally be sold in Australia.

    It is claimed in the document that the total wasted energy in
    Australia due to standby and converson losses in external PSU's is a
    massive 845GWh with a CO2 contribution of 885 KTons. This figure is
    0.45% of the total greenhouse contribution from electricity generation
    nationwide and it begs the question "why will the proposed standard
    not apply also to INTERNAL PSU's of similar power rating and with
    multiple outputs?".

    Maybe it will be too hard to police such a standard on the latter so
    they aren't concerned with these items. External PSU's can be seen and
    counted and tested if necessary whereas internal one's aren't so easy
    to get at and regulate. Hell, that doesn't usually worry the gov't -
    they simply make the standard and then leave it up to the various
    importers and manf's to self police. Naturally, ALL of these vested
    interests would adhere to the standard....????
  2. Phil Allison

    Phil Allison Guest

    "Ross Herbert"

    ** External PSUs with ELV outputs are all " prescribed items " - right

    So, any new requirement for energy efficiency would only mean a few extra
    bench tests to be done by a standards lab at the time of granting approval.

    For an unregulated PSU that uses an iron transformer, it will likely only
    mean that it must not run hot when off load or lightly loaded.

    SMPS ought to all pass with flying colours.

    Linear, regulated PSUs may be in trouble.


    The proposal does NOT involve battery chargers or PSUs with more than one DC
    voltage rail.

    ......... Phil
  3. Phil Allison

    Phil Allison Guest

    "Phil Allison"


    Page 17 sets out the maximum allowable off load watts and efficiency to be
    met by this time next year.

    0.5 watts for PSUs under 10 watt rating, otherwise it is 0.75 watts for PSUs
    up to 250 watts.

    These are very low numbers & tough to meet with any iron transformer - even

    Could be tough for SMPS too.

    Looks like it will be a real problem for lots of suppliers.

    ........ Phil
  4. Phil Allison

    Phil Allison Guest

    "Chris Jones" <

    * So the Chinese are going to resdesign existing products so they need a
    specially designed external PSU instead of an off the shelf one ? Hardly

    ** The effect of the proposed regulation will be to make nearly * ALL *
    currently available external AC and DC supplies illegal to sell. The
    Jaycar catalogue lists only one PSU that appears to comply ( MP-3236).

    Products that need an AC external supply will likely all have to be removed
    for sale by this time next year - ie most modems and domestic alarm

    None of this for any good purpose.

    Pure insanity.

    ........ Phil
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