4.1.2
Three-phase directional overcurrent protection DPHxPDOC
4.1.2.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three-phase directional overcurrent
protection, low stage
DPHLPDOC
3I> ->
67-1
Three-phase directional overcurrent
protection, high stage
DPHHPDOC
3I>> ->
67-2
4.1.2.2
Function block
GUID-9EB77066-518A-4CCC-B973-7EEE31FAE4F1 V3 EN
Figure 44:
Function block
4.1.2.3
Functionality
In the DT mode, the function operates after a predefined operate time and resets when
the fault current disappears. The IDMT mode provides current-dependent timer
characteristics.
The function contains a blocking functionality. It is possible to block function outputs,
timers or the function itself, if desired.
4.1.2.4
Operation principle
The function can be enabled and disabled with the
Operation
setting. The
corresponding parameter values are "On" and "Off".
The operation of DPHxPDOC can be described using a module diagram. All the
modules in the diagram are explained in the next sections.
1MRS757454 D
Section 4
Protection functions
611 series
107
Technical Manual
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