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high ac voltage destrucive or not?

After reading all the threads about ac voltage these past few months I pulled out my handy dandy fluke meter and meaured about 126 volts ac out of the wall and 128 out of my powervar. For all the electical gurus is this harmful to the electonics or part of the variables in ac delivery , thanks for any help. system consist of pass 350, sfl2 preamp and audiologic dac.
renotunes
sean
6,231 posts
 
You're right on the edge of being high enough to cause damage to some gear. Much of this will depend on the individual component and how it is designed.

Keep an eye on the voltage for a few days and chart the voltages and the day / time that you take those readings. If this is a regular occurance or only occurs at certain times, , being able to provide the power provider with specifics may help them to rectify the situation. Sean
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aball
2,018 posts
 
In circuit design, a 50% voltage rating increase is typical so there is no problem with 128V. If your components get damaged by it, you know never to buy from those companies again.

Also, upper-level Fluke meters ARE true RMS (beyond model number 77 (or new 177) I think).
elgordo
530 posts
 
Sean - You say that the power company may rectify the situation. You mean they will convert him to DC? ;^)
herman
2,259 posts
 
All AC voltmeters read the rms value of a sine wave, so unless you have seriously corrupted AC coming into your house the reading is accurate.
renotunes OP
5 posts
 
thanks for all your responses, will power conditioners decreasde the current to 120, it seems the powervar keeps it constant, is this a defect or part and parcel of the same problem.
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