Steve
What is the BIL rating of the transformer? That governs the SPD Vbrk
value. In general, the SPD voltage rating should be greater then Vpk of
transformer (include overdrive) and less then BIL rating. Keep in mind
that MOVs are for “occasional” switching transients. If the MOV is
operating every cycle they will blow up spectacularly in rather short order.
Best Regards
Dave “Sparky” Sharpe
On Wed, Nov 27, 2019 at 11:50 AM Steve White <steve.white1@xxxxxxxxx> wrote:
> I have about twenty 1800 volt MOVs that I bought several years ago. I am
> considering replacing the safety gap of my pole transformer powered RSGTC
> with an arrester made from these MOVs. The RMS output of my 10 KVA pole
> transformer is 14.4 KV. What peak voltage value should I use for the MOV
> string?
>
> Steve White
> Cedar Rapids, Iowa
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--
Dave Sharpe, TCBOR/HEAS
Chesterfield, VA USA
Sharpe's Axiom of Murphy's Law
"Physics trumps opinion!"
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