Ken,
Thanks for the scientific explanation.
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "Ken Norton" <ken@xxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Thursday, February 25, 2010 11:09 AM
Subject: Re: [OM] Purchase of new camera case successful
> >
>> I have to agree with you, Ken. I found our voltage low last year, and
>> checked several neighboring homes as well. When I found it to be a
>> common
>> problem, I called the utility company and had them check it out. They
>> eventually found a faulty breaker in one of their capacitor banks, which
>> caused a low voltage situation on one phase. When they replaced the
>> breaker, all came back to normal. Fortunately, I did not lose any
>> appliances.
>>
>
> Interesting. Those capacitor banks are quite necessary to reshape the
> waveform. Instead of a nice rounded sine-wave, high load on your segment
> will cause the lower voltage portion of the waveform to flatten to zero
> leaving these nasty triangular spikes. If you place a FLUKE volt-meter in
> your outlets, you'll see a proper voltage, but the RMS value is
> substantially lower. Waaay lower.
>
> About the only way to really be sure about your household power is to
> place
> a FLUKE oscilliscope across the leads and examine the waveform.
>
> This is a very common problem in areas where you have mostly residential,
> but there is one small manufacturing plant running high-power electric
> motors. During startup or under load, the motors are drawing so much
> current
> that it alters the waveform. the peak-to-peak voltage remains proper for
> everybody else, but 1/2 or more of the waveform get's flattened to zero
> with
> all sorts of little noise spikes.
>
> AG (Fluke rules!) Schnozz
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