|[AMRadio] Power factor|
wb3fau at hotmail.com
Thu Apr 4 11:00:21 EST 2002
Don, this won't fully answer your question about power factor
of electrolytic capacitors, but it will lead you in the right
direction. My Heath IT-28 cap tester has a power factor adjustment,
it is a percentage, a low percentage means a very good
cap. Anything over about 15% means a limited lifetime. Russ
>From: "Donald Chester" <k4kyv at hotmail.com>
>Reply-To: amradio at mailman.qth.net
>To: billsmith at ispwest.com
>CC: amradio at mailman.qth.net
>Subject: [AMRadio] Power factor
>Date: Thu, 04 Apr 2002 08:24:15
>>From: "Bill Smith" <billsmith at ispwest.com>
>>If the cap shows high leakage, or a high power factor, it is probably
>> >spent, but if it acts as a new capacitor you have saved a good part.
>What exactly do you mean by a capacitor's power factor? How do you measure
>it and exactly what are you measuring? I am familiar with the concept when
>talking about transformers, but what about capacitors? I would assume the
>power factor of a good capacitor standing alone would be zero, since the
>(ac) current would lead the voltage by 90 degrees.
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