From Newsgroup: sci.electronics.basics

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
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From Newsgroup: sci.electronics.basics

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
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From Newsgroup: sci.electronics.basics

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!!!


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From Newsgroup: sci.electronics.basics

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?

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From Newsgroup: sci.electronics.basics

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
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