Woodward High PROTEC MRU4, Руководство пользователя

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Protective Elements
PCC in MV systems
The German regulation „Erzeugungsanlagen am MS-Netz“
(BDEW, Issue June 2008 [2] ) recommends to have a
time delay (some minutes) between mains voltage recovery and reclosure after a trip of a decoupling system as a
result of a mains failure. This is to wait until all switching operations are completed. Usually this is the case after 10
minutes. A reconnection of the DER is only permitted, when the mains voltage is >95% of Vn and the frequency is
in the range of 47.5 Hz to 50.05 Hz.
Set the trigger (decoupling) signals in the menu
[Global Prot Para\Intercon-Prot\ReCon\Decoupling] which start the mains recovery time
(OR logic).
Select a sufficiently long recovery time »t1-Release Blo
« in the menu
[Protection Para\Set[x]\Intercon-Prot\ReCon\Release Para].
Reconnection is only possible after this timer has
been elapsed (This time stage will be triggered by the signals that are assigned in menu
[Global
Para\Intercon-Prot\Reconnection\Decoupling]
).
In the menu
[Protection Para\Set[x]\Intercon-Prot\ReCon\Release Para]
the frequency and voltage range to
be met for reconnection can be set.
Set the parameters for the release of the voltage as described in the corresponding sections for the voltage
release.
459 MRU4 DOK-HB-MRU4-2E