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
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...
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."
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
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.