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Section 3
Configuration
QB1
QB2
QA1
IEC16000257 V2 EN-US
Figure 7:
3.1.7
Description of 1 ph packages B20 and B21
One-phase version of the IED with two low-impedance differential protection zones and twelve
CT inputs B20, B21.
•
Due to three available binary input modules, the B20 is intended for applications without
need for dynamic Zone Selection such as substations with single busbar with or without
bus-section breaker, one-and-half breaker or double breaker arrangements. Three such
IEDs offer cost effective solutions for such simple substation arrangements with up to
twelve CT inputs.
•
The B21 is intended for applications in substations where dynamic Zone Selection or
bigger number of binary inputs and outputs is needed. Such stations for example are
double busbar station with or without transfer bus with up to 12 CT inputs. Note that
52
ZA
ZB
QB1
QB2
QB1
QA1
QB2
QB1
QB2
QA1
QA1
Other Functions available from the function library
87B
MET
BDC GAPC
C MSQI
63
Control
S SCBR
S SIMG
Optional Functions
ITHD ITHD
79
5(0→1)
CHM MHAI
SMB RREC
VERSION OF REB670
REB670(A31 – X03) 3-Phase, 8 Bays, 2 Zones for Double Busbar
Stations with Breaker Failure Protection and End Fault Protection 24AI
* With Just one CT in the Bus Section Bay
Configuration diagram for A31, configuration X03
87B
BDC GAPC
87B
1
BDC GAPC
87B
BDC GAPC
87B
BDC GAPC
2
87B
BDC GAPC
87B
BDC GAPC
8
87B
BDC GAPC
MET
I
C MMXU
51_67 4(3I>)
50BF 3I>BF
OC4 PTOC
CC RBRF
MET
I
C MMXU
51_67 4(3I>)
50BF 3I>BF
OC4 PTOC
CC RBRF
87B
BCZT PDIF
51_67 4(3I>)
50BF 3I>BF
OC4 PTOC
CC RBRF
MET
I
C MMXU
Isqi
MET
P/Q
7I
DELTAI
7V_78V
DELTAU
CV MMXN
DELV SPVC
DELI SPVC
71
3
Control
MET
U
S SIML
S XCBR
V MMXU
VTHD UTHD
VHM MHAI
NUMBER OF FEEDERS IN THE STATION
( EXCLUDING BUS COUPLER BAY)
1MRK 505 370-UEN D
REB670(A31-X03)
DFR/SER DR
DRP RDRE
2
87B
3Id/I
BZIT GGIO
8
1
87B
3Id/I
BUT PTRC
87B
3Id/I
BZNT PDIF
2
87B
3Id/I
BUT PTRC
3Id/I
87B
3Id/I
8
BZNT PDIF
87B
3Id/I
BUT PTRC
7
MET
DELTA
W/Varh
Control
ETP MMTR
Q CBAY
DEL SPVC
MET
UN
MET
Usqi
VN MMXU
V MSQI
7*
1EC16000257=IEC16000257=2=en-us=Original.vsd
Busbar protection REB670
Application manual
SEMOD129275-40 v8
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