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Power-User

Join Date: Jul 2011
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Switchyard

01/27/2017 12:58 AM

In power stations, the generator unit step up transformers are usually placed outside the boundary fence of the air insulated switch yard. why ? the name switch yard tells that it should have only switching & protection equipment but still curious why the unit step up transformers placed outside the switch yard?

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Guru

Join Date: Mar 2007
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#1

Re: switchyard

01/27/2017 1:24 AM
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Guru

Join Date: Oct 2012
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#2

Re: switchyard

01/27/2017 5:18 AM

NFPA 850/2010 Recommended Practice for Fire Protection for Electric Generating Plants and High Voltage Direct Current Converter Stations.

5.1.4 Outdoor Oil-Insulated Transformers.

5.1.4.1 Outdoor oil-insulated transformers should be separated from adjacent structures and from each other by firewalls, spatial separation, or other approved means for the purpose of limiting the damage and potential spread of fire from a transformer failure. [and other articles from here].

NFPA 30 and other, and other...

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Guru

Join Date: Feb 2013
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#3

Re: Switchyard

01/28/2017 5:42 AM

What? They are? Switch yards have switches, Protection yards have protection, and transformer yards have transformers. They like to have their own space as on occassions they just don't get on. A bit like tigers and goats and sheep.

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Anonymous Poster #1
#4

Re: Switchyard

01/28/2017 6:40 AM

Tensions run high when step-up transformers are in the vicinity and so they keep them fenced-off from the other guys.

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Guru

Join Date: Feb 2013
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#5
In reply to #4

Re: Switchyard

01/28/2017 7:13 AM

These Tfx's step up to any nonesense from a switch yard. That is why they keep the breakers in a special room to stop further destruction in the yards.

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Anonymous Poster #1
#6
In reply to #5

Re: Switchyard

01/28/2017 2:05 PM

In the 'back 40' meanwhile ...

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Guru

Join Date: Sep 2016
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#8
In reply to #6

Re: Switchyard

01/29/2017 11:45 AM

hahaha, nice one.

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Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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#9
In reply to #6

Re: Switchyard

01/30/2017 4:11 AM

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Guru
New Zealand - Member - Kiwi Popular Science - Weaponology - New Member Engineering Fields - Power Engineering - New Member Engineering Fields - Electrical Engineering - New Member

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#10
In reply to #6

Re: Switchyard

01/30/2017 3:22 PM

I call BS on this, clearly the conductor length between towers and resulting sag greatly exceeds the minimum safe operating distances and ground clearances.

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Guru

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#11
In reply to #10

Re: Switchyard

01/30/2017 3:50 PM

All is just fine. These are female towers, look closely, their are no guys. Don't get too phased. Don't get strung out, after all, it is only a phase they are going through.

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Guru
New Zealand - Member - Kiwi Popular Science - Weaponology - New Member Engineering Fields - Power Engineering - New Member Engineering Fields - Electrical Engineering - New Member

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#12
In reply to #11

Re: Switchyard

01/30/2017 4:40 PM

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Guru

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#13
In reply to #12

Re: Switchyard

01/30/2017 4:49 PM

You must have seen that coming.

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#7

Re: Switchyard

01/28/2017 8:14 PM

The transformers have a cooling system that is regularly checked by the operating staff every shift, and logged. Only the supervisor has access to the switch yard, not the operating staff.

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7anoter4 (1); Anonymous Poster (2); gutmonarch (1); IQ (4); jack of all trades (2); jdretired (1); PWSlack (1); SolarEagle (1)

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