novaBBS - alt.engineering.electrical - Re: self-regulating line capacitor at 20 kV with potential transformer?

self-regulating line capacitor at 20 kV with potential transformer?

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From: noo...@nospam.com (Dimitris Tzortzakakis)
Newsgroups: alt.engineering.electrical
Subject: self-regulating line capacitor at 20 kV with potential transformer?
Date: Fri, 22 Apr 2022 18:41:06 +0300
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by: Dimitris Tzortzakaki - Fri, 22 Apr 2022 15:41 UTC

There are many of these here (Greece, Crete, Iraklion Prefecture) at
first I thought they were circuit breakers, but then saw one of them
wired in delta, and that's defintely not a way to wire a circuit
breaker!and of course circuit breakers don't need potential
transformers, they need current transformers! I will post a link to a
photo as long as I can take a photo of one of them! (they're only at
rural areas!)

Re: self-regulating line capacitor at 20 kV with potential transformer?

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From: jacksonb...@gmail.com (Jackson Benete)
Newsgroups: alt.engineering.electrical
Subject: Re: self-regulating line capacitor at 20 kV with potential
transformer?
Date: Wed, 11 May 2022 20:54:14 -0300
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by: Jackson Benete - Wed, 11 May 2022 23:54 UTC

On 22/04/2022 12:41, Dimitris Tzortzakakis wrote:
> There are many of these here (Greece, Crete, Iraklion Prefecture) at
> first I thought they were circuit breakers, but then saw one of them
> wired in delta, and that's defintely not a way to wire a circuit
> breaker!and of course circuit breakers don't need potential
> transformers, they need current transformers! I will post a link to a
> photo as long as I can take a photo of one of them! (they're only at
> rural areas!)

I'm curious to see that!
Please share with us.
Good to see something real in these engineering newsgroups.
They're totally empty or else it's spam. :(

Re: self-regulating line capacitor at 20 kV with potential transformer?

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From: noo...@nospam.com (Dimitris Tzortzakakis)
Newsgroups: alt.engineering.electrical
Subject: Re: self-regulating line capacitor at 20 kV with potential
transformer?
Date: Fri, 12 Aug 2022 16:43:20 +0300
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by: Dimitris Tzortzakaki - Fri, 12 Aug 2022 13:43 UTC

Στις 12/5/2022 2:54 π.μ., ο/η Jackson Benete έγραψε:
> On 22/04/2022 12:41, Dimitris Tzortzakakis wrote:
>> There are many of these here (Greece, Crete, Iraklion Prefecture) at
>> first I thought they were circuit breakers, but then saw one of them
>> wired in delta, and that's defintely not a way to wire a circuit
>> breaker!and of course circuit breakers don't need potential
>> transformers, they need current transformers! I will post a link to a
>> photo as long as I can take a photo of one of them! (they're only at
>> rural areas!)
>
> I'm curious to see that!
> Please share with us.
> Good to see something real in these engineering newsgroups.
> They're totally empty or else it's spam. :(

https://www.flickr.com/photos/167258532@N02/52279736772/in/dateposted-public/
https://www.flickr.com/photos/167258532@N02/52279738022/in/dateposted-public/
https://www.flickr.com/photos/167258532@N02/52280986889/in/dateposted-public/
it's not a self-regulated capacitor as I first thought, it's a sulfur
hexafluoride (SF 6) circuit breaker and the potential transformer is
supllying the auxilliary voltage! I suppose they installled them (there
are LOTS of them)so as easily to disconnect a part of the line. before
that theu had to open the circuit breaker all the way upstream to the
150/20 kV substation, open the disconnect switch, which would disconnect
the line downstream, and then reclose the circuit breaker. closing again
the disconnect switch would cause no problems. you can see here upstream
a disconnect switch.

"When in doubt, print 'em out." -- Karl's Programming Proverb 0x7

tech / alt.engineering.electrical / Re: self-regulating line capacitor at 20 kV with potential transformer?

Subject	Author
self-regulating line capacitor at 20 kV with potential transformer?	Dimitris Tzortzakakis
Re: self-regulating line capacitor at 20 kV with potential	Jackson Benete
Re: self-regulating line capacitor at 20 kV with potential	Dimitris Tzortzakakis