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  • Oil & Gas Network protection system

    by
    saberetap
    Published on 08-25-2013 01:18 AM
    0 Comments Comments
    We have a 5.5kV network in our offshore plateform. I do all electrical simulation with ETAP 7.5 Software. I have some questions:
    - We have 4 generators in service with relay protection. And in each generator incomer we have another relay. In case of fault between generator and 5.5kV busbar I opte to use ANSI 67 function to isolate faulted incomer. ANSI 50 can be desactivated or no. Also for setting, I chose In and the time delay (0.15s) that allow it to trip before the ANSI 50 of other incomers trip (2s)..
    - In ETAP software, to allow the two function 50 and 67 I must use two separate relays!!
    - Setting of 59N and 67N for isolated neutral system.


    NB: we have 2 generators of 5MW and 2 generators of 2.5MW.

    Thanks for your help
    This article was originally published in forum thread: Oil & Gas Network protection system started by saberetap View original post

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