ABB Relion 670 series - Page 512

Phase
currents
Phase
ground
voltages
IN
VN
ANSI13000013-1-en.vsd
ANSI13000013 V1 EN-US
Figure 264: Connection of SDEPSDE to analog preprocessing function block
Overcurrent functionality uses true 3I0, i.e. sum of GRPxA, GRPxB and GRPxC. For 3I0 to be
calculated, connection is needed to all three phase inputs.
Directional and power functionality uses IN and VN. If a connection is made to GRPxN this signal is
used, else if connection is made to all inputs GRPxA, GRPxB and GRPxC the internally calculated
sum of these inputs (3I0 and 3V0) will be used.
8.6.3 Function block
SEMOD172780-4 v5
ANSI07000032-2-en.vsd
SDEPSDE (67N)
I3P*
V3P*
BLOCK
BLKTR
BLKTRDIR
BLKNDN
BLKVN
TRIP
TRDIRIN
TRNDIN
TRVN
PICKUP
PUDIRIN
PUNDIN
PUVN
PUFW
PUREV
CND
VNREL
ANSI07000032 V2 EN-US
Figure 265: SDEPSDE (67N) function block
Section 8 1MRK 502 066-UUS B
Current protection
506
Technical manual