[GreenKeys] History - Why voltages andfrequencies are chosen(5v & 3.3v l...

[Sheldon Daitch]

Kuwait is using 240/415VAC as the nominal single phase and
three phase power line voltages, assuming they can keep them adjusted.

At home, we had up to 257VAC phase to neutral for a few weeks, and I was
going through incandescent lamps quite rapidly.  Line voltage is now much
closer to the 240VAC nominal.

I can tell that the power ministry doesn’t do well on frequency control, as
the power line time base driven clocks in the stove and the microwave oven
aren’t very accurate.  The stove clock is about 30 minutes ahead of real time
now.

73
Sheldon

From: greenkeys-bounces at mailman.qth.net [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Peter Gottlieb
Sent: Friday, November 23, 2012 8:47 PM
To: Ralph Mowery
Cc: <Greenkeys at mailman.qth.net>
Subject: Re: [GreenKeys] History - Why voltages andfrequencies are chosen(5v & 3.3v l...

380, more lately standardizing on 400, is European although we are still getting orders for 380 for China.  Right now we have this MG set at work to get 380 50Hz for testing. Crude, but effective.

Peter


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