GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW) | ||||||
---|---|---|---|---|---|---|
|
14:33 Oct 4, 2016 |
Polish to English translations [PRO] Tech/Engineering - Automation & Robotics | |||||||
---|---|---|---|---|---|---|---|
|
| ||||||
| Selected response from: Frank Szmulowicz, Ph. D. United States Local time: 14:19 | ||||||
Grading comment
|
Summary of answers provided | ||||
---|---|---|---|---|
3 | time-delay overcurrent protection elements |
|
time-delay overcurrent protection elements Explanation: Reszta to independent, definite-time delay overcurrent relay. cccccccccccccccccccccccccc INDEPENDENT (DEFINITE) TIME OVERCURRENT RELAYS Each protection unit comprises a definite-time delay overcurrent relay in which the operation of the current sensitive element simply initiates the time delay Overcurrent relays are normally also provided with elements having independent or definite time characteristics. These characteristics provide a ready means of co-ordinating several relays in series in situations in which the system fault current varies very widely due to changes in source impedance, as there is no change in time with the variation of fault current http://www.fecime.org/referencias/npag/chap9-122-151.pdf ccccccccccccccccccccccccccccccccccccccccccccccccccccccc This model (Figure 1) represents the operation of >definite time overcurrent relay</b after a fault occurred at the transmission line. http://www.simulink-simpowersystems-examples.com/2015/03/Def... ccccccccccccccccccccccc This would have a time/current characteristic as in Figure Lib The addition of a timing device results in a definite time-delay overcurrent relay. https://books.google.com/books?id=HMLBEXay1DUC&pg=PA127&lpg=... -------------------------------------------------- Note added at 17 mins (2016-10-04 14:51:14 GMT) -------------------------------------------------- cccccccccccccccccc Definite Time Overcurrent Relays In this type, two conditions must be satisfied for operation (tripping), current must exceed the setting value and the fault must be continuous at least a time equal to time setting of the relay. vs. Instantaneous Overcurrent relay (Define Current) Definite current relay operate instantaneously when the current reaches a predetermined value. http://electrical-engineering-portal.com/types-and-applicati... |
| |
Grading comment
| ||
Login to enter a peer comment (or grade) |
Login or register (free and only takes a few minutes) to participate in this question.
You will also have access to many other tools and opportunities designed for those who have language-related jobs (or are passionate about them). Participation is free and the site has a strict confidentiality policy.