ABB Zenith
31
ZTSCT / ZBTSCT Operation & Maintenance Manual
C.V. SCR-N CONTROL VOLTAGE (SOURCE 1)
C.V. SCR-E CONTROL VOLTAGE (SOURCE 2)
C.V. SCR-EO CONTROL VOLTAGE (OPEN SOURCE 2)
C.V. SCR-NO CONTROL VOLTAGE (OPEN SOURCE 1)
SCR-NO
JC
908
JC
C.V.
SCR-E
C.V.
901
JC
JC
908
808
JC
SCR-EO
C.V.
JC
JC
801
JC
SCR-N
C.V.
GND
907
903
902
801
901
807
804
803
904
905
906
805
806
GROUND
COMMON
J5
24V
10V
11V
10V
24V
10V
11V
10V
XN1
XN2
20
21
22
XN1 -
XN2 -
XE1 -
XE2 -
SOURCE 1 CONTROL TRANSFORMER
SOURCE 1 3 PHASE SENSING
TRANSFORMER
SOURCE 2 CONTROL TRANSFORMER
SOURCE 2 3 PHASE SENSING
TRANSFORMER
SINGLE PHASE SOURCE 2 SENSING
3-PHASE SOURCE 1 SENSING
SOURCE 1 CONTROL POWER
SOURCE 2 CONTROL POWER
800
902
804
803
805
806
804
807
900
902
904
903
905
906
904
907
800
900
SOURCE 2 24V OUTPUT
SOURCE 1 24V OUTPUT
(18)
(1)
908
808
XE1
30
XE2
31
32
3-PHASE SOURCE 2 SENSING
Relay/Transformer (R/T Box)
(cont’d)
Figure 18
Closed Transition CPS Schematic