Hi Vasile,

I am not so sure. I remember here we could buy Russian (former Soviet
Union) products on the black market. They did not use a frame ground at
all, and all the insulation were very weak. IIRC it was explained by the
fact the network is not grounded there at all and if user accidentally
touches ONE of wires she could not be stoken as power lines are generally
separated from the ground. All these product were blackmarketed because of
the official Hungarian Standard was more like DIN and did not allow to use
these products (lamps, soldering irons, drills etc.) . Devices having
double insulation (e. g. razor) were NOT forbidden.

Regards,
Imre

On Fri, 22 Feb 2002, Vasile Surducan wrote:

> Harold, the neutral is grounded all over the world !
> But your ideea about don't fusing neutral is wrong because this ground
> connection is done near the transformer and some time there are long
> distances through user to transformer. This means a lot of dropout voltage
> on the neutral.
> Also fusing neutral is not only for short circuits to phase but also for
> high currents in that phase/neutral circuit.
> About 20A on one phase is too much, you'll overbalance the system. The max
> admitted current for one phase system is 9...10 A.
>
> Now you'll check if your device is right projected. [big grin]
>  ( east european and russian mains have 220V +20% -15% running at 45...50 Hz.
> Success, Vasile
>
>
>
>
> On Thu, 21 Feb 2002, Harold M Hallikainen wrote:
>
> >         I have a customer wanting to use our equipment in Russia. They'd be
> > using a single phase 20A circuit. I understand they use 230V, 50 Hz. Do
> > they have a grouned neutral, as we do here in the US? In the US, we rely
> > on the neutral being grounded, so we don't fuse it (since a neutral short
> > to ground does not create a fire hazard). So, what is the power
> > configuration in Russia? Anyone aware of a website that shows
> > schematically electrical standards throughout the world (single and three
> > phase, from the final distribution transformer(s) to the customer load,
> > including standard placement of grounds, fuses, etc)?
> >
> > Thanks!
> >
> > Harold
> >
> >
> > FCC Rules Online at http://hallikainen.com/FccRules
> > Lighting control for theatre and television at http://www.dovesystems.com
> >
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