![ABB REC650 ANSI Technical Manual Download Page 122](http://html.mh-extra.com/html/abb/rec650-ansi/rec650-ansi_technical-manual_2772122.webp)
6.5
Sensitive directional residual overcurrent and power
protection SDEPSDE (67N)
6.5.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Sensitive directional residual over
current and power protection
SDEPSDE
-
67N
6.5.2
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
0
·cos
j
or 3I
0
·
j
, or
residual power component 3V
0
·3I
0
·cos
j
, for operating quantity. There is also available
one non-directional 3I
0
step and one non-directional 3V
0
overvoltage tripping step.
6.5.3
Function block
ANSI08000036-1-en.vsd
SDEPSDE (67N)
I3P*
V3P*
BLOCK
BLKVN
TRIP
TRDIRIN
TRNDIN
TRVN
PICKUP
PUDIRIN
PUNDIN
PUVN
PUFW
PUREV
CND
VNREL
ANSI08000036 V1 EN
Figure 43:
SDEPSDE (67N) function block
Section 6
1MRK 511 287-UUS A
Current protection
116
Technical manual
Summary of Contents for REC650 ANSI
Page 1: ...Relion 650 series Bay control REC650 ANSI Technical manual ...
Page 2: ......
Page 42: ...36 ...
Page 60: ...54 ...
Page 66: ...60 ...
Page 424: ...418 ...
Page 566: ...560 ...
Page 636: ...630 ...
Page 699: ...693 ...