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
elapsed. (This timer 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.
918
MCDLV4
DOK-HB-MCDLV4-2E
Summary of Contents for HighPROtec MCDLV4
Page 3: ...Order Code Order Code 3 MCDLV4 DOK HB MCDLV4 2E...
Page 47: ...Installation and Connection 47 MCDLV4 DOK HB MCDLV4 2E...
Page 164: ...Input Output and LED Settings 164 MCDLV4 DOK HB MCDLV4 2E...
Page 433: ...Parameters 433 MCDLV4 DOK HB MCDLV4 2E...
Page 457: ...Device Parameters 457 MCDLV4 DOK HB MCDLV4 2E...
Page 473: ...Blockings 473 MCDLV4 DOK HB MCDLV4 2E...
Page 988: ...Protective Elements 988 MCDLV4 DOK HB MCDLV4 2E P P Q P Q P Q Q Q P S S...
Page 989: ...Protective Elements 989 MCDLV4 DOK HB MCDLV4 2E Pr Q P Q P Qr...
Page 1023: ...Protective Elements 1023 MCDLV4 DOK HB MCDLV4 2E...
