ABB RER670 - Page 97

Solution 1
V
U
S
I
V
I
U
I
V
I
U
I
S
HV-side
LV-side
16MVA
132/15kV
T1PPDIF
I2PW1
BLOCK
BLKRES
TRIP
I2PW2
BLKUNRES
BLKDRUNR
BLKDRSEN
TRRES
TRUNRES
TRDRUNR
TRDRSEN
START
IDALARM
ST2NDHRM
ST5THHRM
STWAVDET
IDL
IDLMAG
IBIAS
SMAI2
BLOCK
GRP2L1
GRP2L2
GRP2L1L2
GRP2N
G2AI2P
G2AI1
G2AI2
G2AI3
G2AI4
G2N
SMAI1
BLOCK
GRP1L1
GRP1L2
GRP1L1L2
GRP1N
G1AI2P
G1AI1
G1AI2
G1AI3
G1AI4
G1N
IED
1
2
2
3
3
4
4
5
CT 200/1
Star connected
CT 1600/1
I
S
1
IEC16000064-1-en-original.vsd
I
N
IEC16000064 V1 EN-US
Figure 37: CT wiring, pre-processing blocks and T1PPDIF connections for the
proposed Solution 1
1 HV side: Two individual phase currents from a star-connected two-phase CT set are connected to
two CT inputs in the IED
LV side: A single phase current from the one-phase CT is connected to a third CT input in the IED
1MRK 506 375-UEN A Section 6
Differential protection
Railway application RER670 2.2 IEC 91
Application manual