Re: "induction coil" fault situation?

On 2008-08-15, N Cook <diverse8@[EMAIL PROTECTED]
> wrote:
> Udo Piechottka <UpNews@[EMAIL PROTECTED]
> wrote in message
> news:g83jkc$gok$1@[EMAIL PROTECTED]
>> N Cook schrieb:
>> > Scenario:
>> > a 300 watt toroidal transformer delivering 50-0-50 volts. If there
was a
>> > break in the output paths  to load.
>> > So say a current of 2 amps was interrupted, would a high DC  voltage
,
> much
>> > higher than mains level, be generated momentarily across the primary
?
>> >
>
> With no filter caps etc in place, straight off the mains, would you care
to
> put a figure on the peak voltage of the spike generated in the primary,
> appearing at the primary , rather than down the supply feed ?
> The secondary interrruption is abrupt due to a faulty broken connection
that
> sometinmes makes sometimes breaks.

The spike will be about big enough to stop all but the magnetising
current from flowing in the primary.

but you won't see much voltage spike on the mains.

Bye.
   Jasen