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ayubkseb
Member

Join Date: Apr 2008
Location: Doha Qatar
Posts: 8

Distance protection

10/05/2008 1:46 AM

I work as power system protection Engineer. How do you select the scheme for applying distance relays . I specifically want to know the selection of choice between permissive under reach and permissive overreach . thanks and regards.
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rakesh_semwal
Guru
India - Member - New Member Engineering Fields - Electromechanical Engineering - New Member

Join Date: Oct 2006
Location: India, 200 Km. North of Delhi.
Posts: 1393
Good Answers: 53
#1

Re: Distance protection

10/05/2008 5:25 AM

Before saying anything can you please specify what exactly is this? Is this for the the Human protection device that will trigger a relay as person go near to system?

Please specify term undre reach and overreach also.
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ayubkseb
Member

Join Date: Apr 2008
Location: Doha Qatar
Posts: 8
#2
In reply to #1

Re: Distance protection

10/05/2008 6:16 AM

could u pl tell me ur background? then we will be able to discuss about it in detail !
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rakesh_semwal
Guru
India - Member - New Member Engineering Fields - Electromechanical Engineering - New Member

Join Date: Oct 2006
Location: India, 200 Km. North of Delhi.
Posts: 1393
Good Answers: 53
#3
In reply to #2

Re: Distance protection

10/05/2008 6:38 AM

Sorry-----

Don't like to put My self in a frame,
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ayubkseb
Member

Join Date: Apr 2008
Location: Doha Qatar
Posts: 8
#4
In reply to #3

Re: Distance protection

10/05/2008 6:56 AM

This universe itself is a big frame !
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V.I.Abraham
Guru
Safety - ESD - New Member India - Member - New Member Engineering Fields - Energy Engineering - New Member

Join Date: May 2007
Location: Pune , India
Posts: 875
Good Answers: 42
#5

Re: Distance protection

10/06/2008 9:56 AM

Dear ayubkseb,

Selection of a distance protection scheme depends on the system voltage , Type of transmission (OH / UG ), Length of transmission , and back up protection etc. Most of the time I used to depend on English Electric company( GEC Alsthom) and other manufacturers to get the details of their standard products to arrive at a suitable selection.

Please go through the following links probably you will get more information on the subject. Please discuss after going through it..

http://www.sayedsaad.com/Protection/files/protection_schemes/1_protection_schem.htm

http://www.sayedsaad.com/Protection/files/protection_schemes/1_sngl_line%20300KV%20feeder%20PS.htm
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ayubkseb
Member

Join Date: Apr 2008
Location: Doha Qatar
Posts: 8
#6
In reply to #5

Re: Distance protection

10/06/2008 11:51 AM

Dear Abraham,

I am going through the link and I will come back to you if some information i get from it.

Thanks and regards.
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ayubkseb (3); rakesh_semwal (2); V.I.Abraham (1)

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