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Electronic load

Discussion in 'Electronic Design' started by TTman, Aug 13, 2013.

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  1. TTman

    TTman Guest

    Any simple way to dump 500Watts fixed @100 volts ? Or is it easier to have
    5 x 100R 100Watt resistors and a big heat sink ? test time would be <
  2. John S

    John S Guest

    Have you tried a toaster, toaster oven, etc?
  3. tm

    tm Guest

    5 or 6 100 watt tungsten halogen bulbs?
  4. Baron

    Baron Guest

    TTman Inscribed thus:
    500W Halagen bulb.
  5. just remember it is pretty much a dead short until it heats up

  6. Give me your mailing address and I will send you two 10R 250W resistors.
    Small heat sink may be needed.
    Cheers, Harry
  7. Guest

    Heathkit used to sell a load for use with transmitters. If I recall correctly it was about ten 2 watt resistors suspended in a gallon of oil.

  8. TTman

    TTman Guest

    Thanks, but it's for a company... they can pay...
  9. Nico Coesel

    Nico Coesel Guest

    I'd oversize it a bit and use 5 200Watt resistors. For a similar load
    I used this heatsink:

    You may expect the load to be present for 1 minute but in reality it
    may need to run longer.

    Otherwise look for an electronic load from Array and use two 300W
    units in parallel.
  10. Five 100 watt or larger resistors are fine for a 1 minute test. whats
    the duty Cycle?
    A Muffin fan blowing across the resistors helps a lot. has Edison Base cone heaters, but they are

  11. Phil Allison

    Phil Allison Guest


    ** Is it DC or AC and if the latter what frequency ?

    Makes a big difference to what load is suitable.

    ..... Phil
  12. John S

    John S Guest

  13. John S

    John S Guest

  14. Robert Baer

    Robert Baer Guest

    Most toaster and toaster ovens are in the 1000W region and use a
    bang-bang temperature controller...
  15. Fred Abse

    Fred Abse Guest

    Check out the Vishay-Sfernice LPS300 range. 300W per unit up to 85C/
    Rth case-heatsink 0.112C per watt.

    A couple of 10 ohm ones, in series, bolted to a really big heatsink,
    should do 500W, 100V, fine.

    Farnell should have them in the UK.

    Read the datasheet, and do what it says...
  16. zwit

    zwit Guest

    light bulbs
  17. Phil Allison

    Phil Allison Guest

    "zed wit"

    ** Why do so many fools suggest bulbs in place of resistors ??

    Incandescent bulbs use tungsten wire that has a strong positive tempco - so
    much so that the effective resistance value changes over a ratio of about 12
    times from room temp to full brightness.

    OTOH, high power resistors use wire that has almost no tempco and the same
    goes for heating appliances ( jugs, toasters room heaters etc).

    .... Phil
  18. Uwe Hercksen

    Uwe Hercksen Guest


    the fools are not aware of the dramatic change of resistance between a
    cold and hot bulb...

  19. Phil Allison

    Phil Allison Guest

    "Uwe Hercksen"
    ** They should measure the resistance of a cold bulb some time....

    .... Phil
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