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  1. #14
    Join Date
    Oct 2010
    Location
    AZ
    Posts
    614
    Quote Originally Posted by geo user View Post
    Has anyone noticed a pattern in the types of capacitors that are failing prematurely? I changed a 60 MFD @370 run capacitor on a compressor 4 ton. It was drawing 21.7 amps. With new capacitor the amp draw dropped to 14.1. In the last 10 years I have changed 5 times as many capacitors as I did in the 90's.
    I think it may be because of the somewhat new regulations in the types of chemicals that can be used inside. The older stuff is a lot more nasty than the newer stuff. I am thinking that the newer stuff may make it easier to fail though. Either that or it is because they are made by China these days which makes crap. And everything is made to fail these days. even stuff that used to be made to last.
    1775 June 26-July 6. (Declaration of the Causes and Necessity for Taking Up Arms) "Our attachment to no nation upon earth should supplant our attachment to liberty." -Thomas Jefferson

  2. #15
    Join Date
    Jul 2000
    Location
    Guayaquil EC
    Posts
    10,081
    電容

    If you don't know what 電容 represents, just Google it.

  3. #16
    The icing on the cake is that that the US has to borrow money from China(the country we outsourced our jobs, products, and even resources to) in order to keep dysfunctionally, functioning. The thought process doesn't make a bit of sense. Not to be a conspiratist, but i'd imagine that the money and politics is not what it seems, there's a black market shuffle involved somewhere. Call it a reasoned rant...

  4. #17
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    6,915
    We also have an ARP forum.............

  5. #18
    Join Date
    Aug 2010
    Location
    Little town in Texas
    Posts
    277

    oh yeah..

    Quote Originally Posted by t527ed View Post
    if it didn't matter they wouldn't make both kinds.
    Yesterday, 07:35 PM
    t527ed
    Professional Member*
    Join Date: Mar 2005
    Location: burlington county n.j.
    Posts: 8,678
    if it didn't matter they wouldn't
    make both kinds.

    ^^^....what he said...^^^
    Now that's funny...can't get more "matter of fact"..than that....damn...I might put that under my quotes...
    "If you can’t describe what you are doing as a process, you don’t know what you are doing." ~ W. Edwards Deming

    All those who wander..are not lost.

    Do NOT..mistake my kindness for weakness.

    The early bird may get the worm..but the second mouse gets the cheese.

  6. #19
    Join Date
    Sep 2011
    Location
    Oklahoma
    Posts
    5
    Understand the type/variety of oil has changed....anybody got any info on this?

  7. #20
    Join Date
    Jul 2011
    Location
    Central PA
    Posts
    175
    Last week I replaced an evaporator fan motor in an ancient looking reach in freezer. It was an old GE motor, made in the USA. The replacement I got from Meiers' was also a GE only it was made in China. It failed after less than a week. May have been a coincidence but I'm more inclined to think the 12 year olds making $2/hr and working 15 hour days are slacking.
    "Good judgement comes from experience. Experience comes from bad judgement."

  8. #21
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    17,014
    Ok.

    In the old days...

    ..that was when I was as young as most of the members here...

    the superior oil used in oil filled capacitors and transformers was "PCB" oil.

    That stands for PolyChlorinated Biphenyl.

    http://en.wikipedia.org/wiki/Polychlorinated_biphenyl

    It had very good dielectric properties.

    Now, the oil is a more "environmentally friendly" substance that is not anywhere near as good for the purpose.

    Secondly, the coatings used on the plates as the primary dielectric are not as good, mostly due to cost of production.

    Mind you, you can still buy a pretty good cap, but it costs a LOT more money. Dry caps used in military electronics, for example, cost a bundle.

    Finally, the Chinese are happy to build a cap to the specifications they are given. The specs they are given will often include a mandate to produce the product at a lower cost, and they will use ONLY the amount of chemicals and materials that are needed in order to accomplish their mission. Longevity of the part is usually NOT a part of their mandate.

    Does that help?
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  9. #22
    Join Date
    Jun 2003
    Location
    New England
    Posts
    163
    Quote Originally Posted by icemeister View Post
    電容

    If you don't know what 電容 represents, just Google it.
    vetty funny

  10. #23
    Nope, doesn't help. I still go to the supply house and ask for a cap and its garbage. The good news is atleast things last longer now than they will in ten more years!

  11. #24
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    17,014
    You could find a supply house that carries Amrad, or even a supply house that carries mexican made caps. They are better than the Chinese caps sold under the Beacon name.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  12. #25
    Join Date
    Sep 2011
    Posts
    19
    ON the same subject. I have installed 50 or more universal run capacitors. You can adjust the size of capacitance. Most of them have failed, some blew up and caught on fire. I thought they would replace the 30 differnent run caps. I am back to stocking lots of different ones again.

  13. #26
    Join Date
    Feb 2007
    Location
    Government base in the woods.
    Posts
    171
    I been gone so long I don't know what that fancy writing with the houses and boxes mean. Something about Q= something over something.
    "Here in Carolina We Get-R-Done"

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