[RFI] What is a MOV

[David Robbins]

Note that the ones used on distribution power lines often look like fat insulators, either plastic or porcelain... you can tell when you examine them because they will have a wire from the top going to the primary wire on the line and a wire from the bottom to the ground wire of the line.

Here are some examples:
An externally gapped Silicon Carbide arrester on a transformer:  http://ten350.com/index-16-transformers.html  followed by some explanations and pictures of other styles.

A 33kv post arrester with probable explosive disconnect at the bottom:  https://www.alibaba.com/product-detail/CHBC-High-Quality-33KV10KA-Class-2_60493887733.html

Pictures of several styles:  https://en.wikipedia.org/wiki/Surge_arrester

W8ji has good stuff on line hardware here:  https://www.w8ji.com/power_line_noise.htm  about half way down he identifies common hardware on a pole.


David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net:7373



-----Original Message-----
From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of Ken Winterling
Sent: Friday, January 11, 2019 16:23
To: w2kkz at verizon.net
Cc: rfi at contesting.com
Subject: Re: [RFI] What is a MOV

>
> Robert,
>
> Google is your friend...  Try “what is a Metal Oxide Varistor” without 
> the quotes.
>
> The Metal Oxide Varistor or *MOV* is a voltage dependent, nonlinear 
> device that provides excellent transient voltage suppression. The 
> Metal Oxide Varistor is designed to protect various types of 
> electronic devices and semiconductor elements from switching and induced lightning surges.
>
> They are used is almost every SMPS (Switch Mode Power Supply) used is just
> about everything today.   They look like thick ceramic disc capacitors and
> come in various glossy colors.
>
>
> Ken
> WA2LBI
>
>
>
> On Fri, Jan 11, 2019 at 11:02 Robert G. Habermehl <w2kkz at verizon.net>
> wrote:
>
>> What is the MOV that was discussed in a previous post?
>>
>> Robert G. Habermehl
>> Sent from Yahoo Mail on Android
>>
>> --

Ken
WA2LBI

Sent from one of my mobile devices
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