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t3I0: Time delay for trip in case of high zero sequence current detection. The trip function can
be used as stand alone short circuit protection with a long time delay. The choice of time delay
is depending on the application of the protection as well as network topology.
15.8.11
Three phase overcurrent LCP3PTOC
GUID-510F1FCE-39ED-4B44-89D0-338B085DD8C3 v1
15.8.11.1
Identification
GUID-5FBC4309-C8FB-4CDF-A4D6-84E3A89C81B7 v1
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three phase overcurrent
LCP3PTOC
-
51
15.8.11.2
Application
GUID-EFA9F558-B4DA-4DA3-AA49-9139EC4C23FD v1
Three phase overcurrent (LCP3PTOC) is designed for detecting over current conditions due to
fault or any other abnormality in the system.
LCP3PTOC could be used as a back up for other local criterion checks.
15.8.11.3
Setting guidelines
GUID-BEC224BD-F45D-4D42-8287-D9D9F4AB3D7B v2
GlobalBaseSel: Selects the global base value group used by the function to define (IBase),
(
UBase) and (SBase).
IOC>: Level of high phase current detection given in % of IBase. This setting can be based on
evaluation of the largest current that can occur during non-faulted network operation: I
loadmax
.
Fault calculations where the smallest current at relevant faults gives: I
faultmin
. The setting can
be chosen: I
loadmax
<
IOC> <I
faultmin
tOC: Time delay for trip in case of high phase current detection. The trip function can be used
as stand alone short circuit protection with a long time delay. The choice of time delay is
depending on the application of the protection as well as network topology.
15.8.12
Three phase undercurrent LCP3PTUC
GUID-E8EAE24D-4B69-43DC-BCFC-C4AC63AA66AB v1
15.8.12.1
Identification
GUID-51A4DEE2-C549-483B-9BDD-8F79AD4CFE23 v1
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three phase undercurrent
LCP3PTUC
-
37
15.8.12.2
Application
GUID-CD2DC0C5-B4D6-4041-9A03-1D01C9158628 v1
Three phase undercurrent protection function (LCP3PTUC) is designed for detecting loss of
load conditions.
1MRK 505 343-UEN B
Section 15
Scheme communication
631
Application manual
Содержание Relion 670 series
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