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Pblsb
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High Voltage Electrical Clearance

03/11/2013 8:50 AM

The electrical clearance for 400kV AC. ph-ph = 4700mm but 400kV DC ph -ph = 1750mm. Why is there such a difference.
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PWSlack
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#1

Re: High Voltage Electrical Clearance

03/11/2013 9:10 AM

Ahem, there's no such thing as a 'phase' on a DC system...

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Pblsb
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#9
In reply to #1

Re: High Voltage Electrical Clearance

03/11/2013 6:35 PM

I am looking at the ABB HVDC document and the table refers to HVDC conductors as phases. The engineers from Sweden who are experts must be wrong. I was hoping someone maybe knew the answer instead of trying to correct my grammar. I was wrong. Enjoy CR4. I'll never visit this site again because you and Redfart are full of CR4P. I've read enough of your previous comments and they're all rubbish. Good luck
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jack of all trades
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#10
In reply to #9

Re: High Voltage Electrical Clearance

03/11/2013 7:09 PM

Your participation in this Engineering forum over the years will be sorely missed.

Perhaps you should try Google Groups if CR4 is not to your liking, I am sure they will welcome your spirited observations and humour with open arms.

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redfred
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#11
In reply to #9

Re: High Voltage Electrical Clearance

03/11/2013 7:51 PM

Actually your grammar was fine. It was your etiquette that was atrocious. I hope that you get a proper grade for your schoolwork. Don't let the digital door byte you on the way out.

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Pblsb
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#2

Re: High Voltage Electrical Clearance

03/11/2013 10:34 AM

What do you mean there isn't a phase in DC. There is a positive and a negative and earth. So please just shut up if you don't know the answer. Regards
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redfred
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#3
In reply to #2

Re: High Voltage Electrical Clearance

03/11/2013 10:47 AM

How rude!

You need to be educated in both electricity fundamentals and manners.

Until you show us some proper manners, I will not help you!

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Pblsb
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#6
In reply to #3

Re: High Voltage Electrical Clearance

03/11/2013 3:11 PM

You don't know the answer. I get it
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redfred
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#7
In reply to #6

Re: High Voltage Electrical Clearance

03/11/2013 3:35 PM

No, you don't get it. Insulting people while asking for a favor will quickly get you nowhere. Be gone infidel.

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jack of all trades
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#8
In reply to #6

Re: High Voltage Electrical Clearance

03/11/2013 4:53 PM

No, what you don't get is that most of those of us that know the answer are not bothering to answer you because of your behaviour.

Have you tried an internet search yourself? You may get a more useful response after alienating the many professional electrical engineers with your behaviour.

Oh, and we may have already answered this question previously on CR4 regarding AC vs DC clearance at transmission level voltages (it sounds familiar), so try a site search also.

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#4
In reply to #2

Re: High Voltage Electrical Clearance

03/11/2013 10:54 AM

You owe an apology to PWSlack.

The variations on meanings for different uses of the word 'phase' include an aspect of non-permanency. 'Phase' indicates (among other things) something having an ephemeral, evanescent or transient quality.

There are no phases in DC.

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PWSlack
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#5
In reply to #4

Re: High Voltage Electrical Clearance

03/11/2013 12:00 PM

It is not possible to insult an username.

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#12
In reply to #5

Re: High Voltage Electrical Clearance

03/11/2013 11:43 PM

I'm curious about your pronunciation:

Do you pronounce the 'u' in 'username' with a sound similar to 'you-' or 'oo-' or some other way?

When you speak, are you more likely to use the construction 'an username' or 'a username'?

.

The reason I ask is, although i believe there is nothing wrong with the construction 'an username', it seems a bit odd unless 'username' was pronounced with the 'u' sounding like 'oo-'.

.

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Anonymous Poster #1
#13

Re: High Voltage Electrical Clearance

04/11/2013 6:02 AM

Hi just send us a picture of the 400kV DC ph-ph ....only then can we tell you why the difference in electrical clearance...greetings sjom
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Users who posted comments:

Anonymous Poster (1); jack of all trades (2); Pblsb (3); PWSlack (2); redfred (3); truth is not a compromise (2)

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