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MOV Search

Started by ABLE1 November 22, 2021
Hello,

I am an Alarm Technician among other things or stuff.

I was thinking about installing a simple MOV on the Transformer
that feeds power to the Alarm Board.  The industry standard is
16.5VAC 40VA plug in Transformer.  120 Volt Input.

Can anyone point to a specific MOV that would serve as a good
lightning or surge protection if placed across the output
terminals of the transformer??

I have seen a NTE524V15 used by others but looking at the spec's
it seems to be a bit much for the application.

https://bit.ly/3cEuvax

Any thoughts out there??

Thanks for any insight.

Les
ABLE1 wrote:
==========> 
> I am an Alarm Technician among other things or stuff. >
** Your secret is safe with me....
> I was thinking about installing a simple MOV on the Transformer > that feeds power to the Alarm Board. The industry standard is > 16.5VAC 40VA plug in Transformer. 120 Volt Input. > > Can anyone point to a specific MOV that would serve as a good > lightning or surge protection if placed across the output > terminals of the transformer??
** NO - MOVs must go on the primary side to be any use.
> I have seen a NTE524V15 used by others but looking at the spec's > it seems to be a bit much for the application. > > https://bit.ly/3cEuvax > > Any thoughts out there??
** That is a primary side device.
> Thanks for any insight.
** Better than nothing in my experience. ...... Phil
On 11/23/2021 1:40 AM, Phil Allison wrote:
> ABLE1 wrote: > =========== >> >> I am an Alarm Technician among other things or stuff. >> > > ** Your secret is safe with me.... > >> I was thinking about installing a simple MOV on the Transformer >> that feeds power to the Alarm Board. The industry standard is >> 16.5VAC 40VA plug in Transformer. 120 Volt Input. >> >> Can anyone point to a specific MOV that would serve as a good >> lightning or surge protection if placed across the output >> terminals of the transformer?? > > ** NO - MOVs must go on the primary side to be any use. > > >> I have seen a NTE524V15 used by others but looking at the spec's >> it seems to be a bit much for the application. >> >> https://bit.ly/3cEuvax >> >> Any thoughts out there?? > > ** That is a primary side device. > > >> Thanks for any insight. > > ** Better than nothing in my experience. > > > ...... Phil >
Thanks Phil and have a good day!!!
On Monday, November 22, 2021 at 7:01:39 PM UTC-8, ABLE1 wrote:

> I was thinking about installing a simple MOV on the Transformer > that feeds power to the Alarm Board. The industry standard is > 16.5VAC 40VA plug in Transformer. 120 Volt Input. > > Can anyone point to a specific MOV that would serve as a good > lightning or surge protection if placed across the output > terminals of the transformer??
If you do that, the lightning has its way with the primary and secondary windings of the transformer; why not use an MOV on the input terminals?
On 11/29/2021 3:03 AM, whit3rd wrote:
> On Monday, November 22, 2021 at 7:01:39 PM UTC-8, ABLE1 wrote: > >> I was thinking about installing a simple MOV on the Transformer >> that feeds power to the Alarm Board. The industry standard is >> 16.5VAC 40VA plug in Transformer. 120 Volt Input. >> >> Can anyone point to a specific MOV that would serve as a good >> lightning or surge protection if placed across the output >> terminals of the transformer?? > > If you do that, the lightning has its way with the primary and secondary > windings of the transformer; why not use an MOV on the input terminals? >
Hi whit3rd, If I did that then Safety would be in question. Now that I know that others were not doing something of betterment I decided to scrap the idea. Better to purchase a plug in surge protector. Les