ABB RET670 Product Manual page 38

Transformer protection RET670
Pre-configured
Product version: 1.1
BBP-TRIP
BLOCK LW 3I>
BBP STEP
ST BFP 3PH
BUCH TRIP
SUDDEN P
OT TRIP
WT TRIP
OT WARN
WT WARN
OIL LOW
GAS ALARM
TC IN MAN
TC IN AUTO
TC IN LOC.
TC RAISE
TC LOWER
HV BUSBAR TRIP
MV BUSBAR TRIP
MAN SC OK
IRF
Figure 19. Typical connection diagram for two winding transformer in a single breaker
arrangement. Note! Including IO for control option.
38
QB1-OPEN
QB1-CL
QB2-OPEN
QB2-CL
QA1-OPEN
QA1-CL
QA1-SPR UNCH
TRM1:1-3
TRM1:7
=
MIM1:1
TRM1:8
TRM1:11-12
MCB-OK
TRM1:4-6
QA1-OPEN
QA1-CL
SPR UNCH
TRM1:10
MCB OK
- +
IEC05000262 V1 EN
1MRK 504 091-BEN B
BUS A
BUS B
-QB1
CLOSE QA1
CLOSE Reinf
TRIP QA1
TRIP Reinf
MAIN 2 TRIP
TO MAIN 2 RELAY
TO BUS PROT
-N.BI1
TAP POS
-N.BI1
MCB OR
FUSE
TO BUS PROT
TO MAIN 2 RELAY
CLOSE QA1
CLOSE Reinf
TRIP QA1
TRIP Reinf
-BU1
Issued: June 2010
-QB2
-QA1
C
C
T
C
T
C
-BI1
P1
-T1
Q
O
Q
W
-BU1
-BI1
P1
-QA1
C
C
T
C
T
C
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