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Thread: LED Downlights, trailing/leading edge transformer

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    Question LED Downlights, trailing/leading edge transformer

    Hi all,

    I've got some 240v down lights that come with a 240 -> 12v trailing edge transformer. Would I be able to replace the transformer with a leading edge one without causing any issues?

    Thanks



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    Some work with both leading and trailing edge.

    With LEDs, you need to see what the manufacturer specifies, as there's a lot of different designs available.

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    I've spoken with the manufacturer and said if a leading edge is used it may cause flickering.
    So does the Dimmable Driver (240 -> 12v) matter? Can I use the existing driver, and try it with a leading edge dimmer?
    Last edited by BassTeQ; 11-04-13 at 11:59 AM.

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    Wink Never the twain shall meet!

    QUOTE=BassTeQ;545462]Hi all,

    I've got some 240v down lights that come with a 240 -> 12v trailing edge transformer. Would I be able to replace the transformer with a leading edge one without causing any issues?

    Thanks
    ---------------------------

    1 Clipsal Leading Edge Dimmer
    450 WATTS


    Features:
    • Separately switched compact modular dimming mechanism
    • 450W rating
    • Wall or architrave mounting options and a wide range of plate styles/colours available
    • Suitable for 1-way or 2-way operation
    • Suitable for incandescent (tungsten filament) lamps
    • Suitable for low voltage downlights using iron core (wire wound) transformers
    • Soft start operation and preset minimum brightness
    • Over temperature compensation
    • Immune to high frequency (ripple) signal injection on mains supply
    • Fitted with suppressors to minimise radio frequency interference
    • Complies with Australian and International EMC Standards.

    Clipsal Edge Leading Dimmer 450va 32E450LM
    Manufactured by Clipsal - Market Leader in Dimmer Quality & Technology.
    Suitable for Incandescent Dimming.


    [quote]
    Trailing Edge.

    HPM dimmer mechanism.
    HPM Cat 400TMWE Light Dimmer
    230-240Vac
    Rated at 400wats or able to dimm a maximun of 8 * 50watt halogon downlight.
    Suitable for most low voltage halogen (dichroic) lamps.[/quote]


    The short answer is " you cant do that there here. "
    Essentially L/E has maximum 240 V output,
    whilst T/E has maximum of 12 V output.
    Also need L/E for 240 V motor control. (exhaust fan.)






    Last edited by beer4life; 11-04-13 at 12:14 PM.

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    Just wondering if I should replace the LED drivers with these, as they mention compatability with both leading/trailing edge dimmers?

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    Quote Originally Posted by BassTeQ View Post
    Just wondering if I should replace the LED drivers with these, as they mention compatability with both leading/trailing edge dimmers?
    It depends on the dimmer you intend to use because the item desciption specifies paticular types & brands of dimmers which are compatable.

    Compatible to HPM leading edge & Clipsal Universal and Clipsal Trailing edge Dimmers
    Given you already have the trailing edge transformers with the lamps (and assuming they are dimmable) why not just use a trailing edge dimmer to suit them, which would probably be cheaper than replacing all the transformers... depending how many you have of course.

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    Ill be using a z-wave dimmer that's designed for leading edge, hence the reason for changing trailing to leading edge.

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