Overvoltage problem on Trace SW after lightning [RE-wrenches]

[Kent Sheldon]

Kurt

You really need to look at the waveform with an o-scope to see if the
waveform is distorted enough to change the RMS value. I'd be surprised if
harmonics where responsible for a large change to RMS output voltage.

Kent Sheldon

-----Original Message-----
From: Kurt Nelson [mailto:sunwise at cheqnet.net]
Sent: Friday, August 31, 2001 7:36 AM
To: RE-wrenches at topica.com
Subject: Re: Overvoltage problem on Trace SW after lightning
[RE-wrenches]


Kent wrote:
> Does the o-scope read the 152Vrms/210Vp or the meter? Is the meter a true
> RMS meter? This sounds suspiciously like a ground reference/measurement
> problem. You did mention there may be problems with the ground grid at
this
> site.
>
Hey Kent,

I have a system with a DR inverter that always seems to read realy high in
ac volts true RMS (fluke 87).  Trace thought I might be reading harmonics.

Just a thought -- Kurt Nelson

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