Protection Relay Solkor RF vis Solkor N

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Anonymous Poster #1	Protection Relay Solkor RF vis Solkor N 04/22/2014 2:43 PM
	For differential protection of 132 or 11KV Long Feeders which is better choice to instal Solkor RF or Solkor N and why?
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: Protection relay Solkor RF vis Solkor N 04/22/2014 3:29 PM
	They do different jobs so <...better...> depends upon all those details of the application that remain completely, and possibly deliberately, hidden from the forum. A telephone call to the local Sales Engineer to discuss those details would be a far faster, more reliable, and therefore <...better...> source of information than waiting for random miscreants here to respond and passing the comments through an ignorance filter some weeks after the intermittent flow has subsided. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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PeterT Guru Join Date: May 2010 Location: Liverpool, NY Posts: 961 Good Answers: 131	#2 Re: Protection relay Solkor RF vis Solkor N 04/22/2014 3:43 PM
	The main choice you will have to make depends on the pilot channel you have existing or can make available between the differential relays at the opposite ends of the lines. The RF uses a 5kV pilot wire channel, based on what is says in its instruction manual: Solkor RF The N model can handle a variety of pilot interfaces, including RS485, RS232, and fiber-optic: Solkor N My preference would be fiber-optic. The interfacing with the relay is simpler (just plug it in). The 5kV pilot wire needs to be converted properly to bring it safely down to device-level voltages, which means extra equipment. Is your line already in place? Does it have a shield wire that could be replaced with one having an integral fiber core (OPGW)? Or might there be a path for fiber already possible in the right-of-way, such as strung from the towers/poles? Those are the questions you should be asking of your application. __________________ To get the right answers, first you need to ask the right questions.
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