Re: MOV lightning arrestor in place of safety gap...MCOV?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "J. Aaron Holmes" <jaholmes@xxxxxxxxxxxxxxxxxx>


The datasheets talk about tests involving hundreds of
amps for several seconds.  I'm hoping a NST would be
harmless to one of these.

--- Tesla list <tesla@xxxxxxxxxx> wrote:
> Original poster: Terry Fritz
> <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
>
> Hi,
>
> Mild current limited voltage testing will not hurt
> them as say from a small
> HV power supply (10mA).  They mean the full current
> over voltage test done
> at the transformer repair shop which is NOT current
> limited other than a
> breaker.  That would quickly overheat and destroy
> the MOV stack.
>
> Cheers,
>
>          Terry
>
>
> At 08:38 AM 5/2/2005, you wrote:
> >Hi All,
> >
> >I have one installed internally on my 10KVA pig,
> and there was a sticker
> >saying not to test it.
> >
> >Just checked.
> >
> >CAUTION
> >MOV arrestor installed.  Do not overvoltage test.
> >
> >So it seems that testing might trash them for
> lightning protection purposes.
> >
> >David E Weiss
>
>
>