Connect with us

5 New power supplies -- reviews

Discussion in 'Electronic Design' started by CC, Jun 24, 2006.

Scroll to continue with content
  1. CC

    CC Guest

    Hi:

    Recently bought a Xantrex XDL-35-5:

    http://www.xantrex.com/web/id/73/p/255/pt/20/product.asp

    I have this Xantrex XPF-350 dual supply on order but don't have yet:

    http://www.xantrex.com/web/id/74/p/1/pt/26/product.asp

    I just received a Kepco XLP-150-16-1200:

    http://www.kepcopower.com/klp.htm

    A Protek 1805 and 3040T:

    http://www.protektest.com/CatgList.asp?prodId=CT_PS

    Haven't looked closely at noise yet, but here are my reviews:

    The Xantrex XDL-35-5 is truly high grade. The interface is easy to use.
    The precision is excellent. I love the ranges of this supply. The
    500mA current range with 0.1mA resolution is great for evaluation of LED
    light sources. The only thing that's wierd is that the supply outputs a
    few negative mV when the output is turned off which produced a few -mA
    into my meter when I was measuring current. It was about 0.014V <-->
    0.007A or vice versa, I forget. But since the voltage was very low, I
    doubt it could actually do anything annoying, unless you were operating
    is as a voltage reference. In that case, better to leave it turned on
    at 0.000V.

    I anticipate the Xantrex XPF-350 will be equally impressive.

    The Kepco, at 1200W constant power and able to reach 150V*8A or 75V*16A,
    compares to only one other product on the market, the Agilent 6030A.
    The Kepco however lists for $1795 while the Agilent is >$5000.

    The Kepco is a little bit awkward. The knobs increment the V/I settings
    in large non-decimal increments. I quickly discovered though, that
    pressing the knobs accesses a fine adjust which allows setting to the
    full display resolution. The only other annoyance is that it sounds
    like a vacuum cleaner. Well, almost. It's way too loud to be
    unannoying if it's just a few feet away. I was almost set to send it
    back and look for another brand until I noticed the price on the
    Agilent. Now I think it's not so bad for the money. I may just try to
    swap out the three fans inside for quieter ones.

    The Protek products are inexpensive and of "reasonable" quality. I
    bought two for home. I also bought two for work. I received only my
    personal copies as of yet. The 1805 works fine (used it to trim my
    beard this morning). The 3040T buzzes quite a bit in the power
    transformer. I don't like that, so Tequipment.net will be replacing it.
    Hopefully the replacement will be Ok. A coworker has a Protek 3033B
    and it is fine. They have a 2 year warranty which is a plus.

    I wish I had the money for the two Xantrex supplies for my home use, but
    a total of $2000 is just not a wise use of one's meager allowance when I
    only get a few hours now and then to play. I'll have to settle for the
    budget brands.

    Summary: Very impressed with Xantrex and will buy more in the future.
    Kepco looks like a good workhorse, just need to put it in another room.
    I suppose I can control it with a LabVIEW Vi or something, since it
    includes all the interfaces standard, which is cool. Protek--good
    enough for general purpose breadboarding and experimenting, for which it
    has better useability and feature/price ratio than competitors like B&K,
    Instek, Extech, Sorensen, etc.

    We need a web site for test equipment reviews!

    Good day!
     
  2. I like the Lambda ZUP system supplies, mainly because
    they are so flexible. Bench or rack mount, manual or
    daisy-chained RS232/485 control as standard, series/
    /parallel, etc. Good vfm.

    http://www.lambdapower.com

    The only thing I don't like about the ZUPs is that
    recovering from an Overvoltage Trip can only be done
    by turning the supply Off and then back On again.
    Unfortunately an OVT can be accidentally triggered
    by programming things in the wrong order.
    Bit of an ambush when operating under remote control.

    Sounds like it has an active pulldown. Some system
    supplies have this, a) to be able to get to an actual
    Zero out, b) To do a rapid discharge of the output-C
    if programmed-down with no external load connected.
     
  3. CC

    CC Guest

    Yeah, I looked at those too. They are nice.
    I suppose if I needed a "system" supply with remote programming more so
    than a bunch of bench supplies under manual operation, the ZUP is very
    compelling. The OVP thing is a little problem. I have an old 1kW HP
    that needs to be turned off to reset.
    Yeah, maybe that's it.


    Good day!
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-