ABB RET670 Product Manual page 40

Transformer protection RET670
Pre-configured
Product version: 1.1
BBP-TRIP
ST BFP
3PH
BLOCK TW 3I>
BBP STEP
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 21. Typical connection diagram for three winding transformer in a single breaker
arrangement. Note! Including IO for control option.
40
QB1-OPEN
QB1-CL
QB2-OPEN
QB2-CL
CLOSE QA1
CLOSE Reinf
TRIP QA1
TRIP Reinf
MAIN 2 TRIP
QA1-OPEN
QA1-CL
QA1-SPR UNCH
TRM1:1-3
QA1-OPEN
QA1-CL
SPR UNCH
CLOSE QA1
CLOSE Reinf
TRIP QA1
TRIP Reinf
TRM1:7
=
TAP POS
MIM1:1
TRM1:8
MCB OR
FUSE
TRM2:7-9
MCB-OK
TRM2:4-6
TRM2:1-3
QA1-OPEN
QA1-CL
SPR UNCH
CLOSE QA1
CLOSE Reinf
TRIP QA1
TRIP Reinf
TRM1:11
MCB OK
Res. for Bus 2
TRM1:12
VT
IEC05000265 V1 EN
1MRK 504 091-BEN B
Issued: June 2010
BUS A
BUS B
-QB1
-QB2
-QA1
C
C
T
C
T
C
-BI1
P1
TO MAIN 2 RELAY
TO BUS PROT
Q
O
Q
W
-BU1
-BI1
TO BUS PROT
-QA1
TO MAIN 2 RELAY
P1
-QA1
C
C
T
C
T
C
-BU1
-BI1
P1
C
C
T
C
T
C
-BU1
en05000265.vsd
ABB