Sensitive Directional Residual Overcurrent And Power Protection Sdepsde (67N) - ABB Relion Technical Manual

Section 8
Current protection
8.3
8.3.1
8.3.2
8.3.3
222
Sensitive directional residual overcurrent and power
protection SDEPSDE (67N)
Identification
Function description
Sensitive directional residual over
current and power protection
Functionality
In isolated networks or in networks with high impedance grounding, the ground fault
current is significantly smaller than the short circuit currents. In addition to this, the
magnitude of the fault current is almost independent on the fault location in the network.
The protection can be selected to use either the residual current, 3I
residual power component 3V
one non-directional 3I step and one non-directional 3V
0
Function block
SDEPSDE (67N)
I3P* TRIP
V3P* TRDIRIN
BLOCK TRNDIN
BLKVN TRVN
PICKUP
PUDIRIN
PUNDIN
PUVN
PUFW
PUREV
CND
VNREL
ANSI08000036-1-en.vsd
ANSI08000036 V1 EN
Figure 99: SDEPSDE (67N) function block
IEC 61850 IEC 60617
identification identification
SDEPSDE -
·cos j, for operating quantity. There is also available
·3I
0 0
1MRK 502 048-UUS A
ANSI/IEEE C37.2
device number
67N
·cosj or 3I ·j, or
0 0
overvoltage tripping step.
0
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