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[OM] Re: Rant: No more $$ to Europe!

Subject: [OM] Re: Rant: No more $$ to Europe!
From: john@xxxxxxxxxxxxxxxx
Date: Tue, 13 Apr 2004 19:42:30 +0100
On Tue, 13 Apr 2004 12:53:20 -0500, Philippe Le Zuikomane
<zuikomane@xxxxxxxxxxxxx> wrote:

>
>My wife and I did just that with a NAD CD player in Paris years ago, plugging 
>it in through a transformer. I'm just guessing, but maybe it was not designed 
>to take the AC frequency change. -- Phil
>

If the equipment is designed to run on 115V, 60Hz ac power then
operating it at 115V, 50Hz through a transformer *might* cause
overheating of the mains transformer in the equipment (not the
step-down transformer). This will happen if the equipment transformer
is "near the bone" in terms of core area and the lower frequency will
then cause a significant rise in magnetising current that could cause
overheating.

It should not be a problem the other way, i.e. using 50Hz equipment on
60Hz with an appropriate step-up transformer (assuming the European
equipment is designed for 220V 50Hz ac).

Modern equipment is (or should be) designed to run internationally,
perhaps with a voltage change switch or links. Most now have switched
mode power supplies that can often run at anything between 100V and
250V.

It is fair to say (from professional experience) that the supply
voltage regulation in the UK tended to be better than that in N
America. May be different now, though!


John Gruffydd (Mold, Wales, UK)
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