Product category:
Electrical hardware
News Release from: Schweitzer Engineering Laboratories | Subject: SEL-351 family
Edited by the Engineeringtalk Editorial
Team on 09 April 2007
Distribution relays measure for free
The SEL-351 family of distribution relays from Schweitzer Engineering Laboratories now includes synchrophasor measurement technology, built in at no charge.
The SEL-351 family of distribution relays from Schweitzer Engineering Laboratories now includes synchrophasor measurement technology, built in at no charge Further, more than 100,000 existing SEL-351 relays can be upgraded without changing hardware for only US $250 each
This article was originally published on Engineeringtalk on 15 Jul 2005 at 8.00am (UK)
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"Until recently, synchronised phasor measurements were available only from laboratory equipment or from expensive, stand-alone phasor measurement units", said SEL Founder and President Edmund O Schweitzer.
"The expense and need for separate equipment have limited the practical use of synchrophasors in utility operations, a problem solved by SEL technology".
With synchrophasor measurements in SEL-351 relays, utilities can quickly and easily: measure the state of the power system rather than estimating it; test instrument transformers within substations to verify that line and bus voltage transformers agree in magnitude and phase; check current transformer polarities, phasing and ratio; analyse faults more thoroughly; improve stability using measured angles between the transmission system and distribution buses; and display event records collected by synchronised SEL relays in perfect time alignment.
The synchrophasor capability in SEL-351 relays is also compatible with SEL Synchrowave software and the SEL-3306 synchrophasor processor.
SEL-5077 Synchrowave server software and the SEL-3306 time-correlate synchrophasor data from SEL-351 relays and send the information to display and archiving systems, such as SEL-5078 Synchrowave console software.
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