ABB DCS800, Installation And Start-Up Manual, Page: 40 / 66

38
Interfacing the Electronics and Thyristors
3ADW000197R0101 DCS800-R Sel e a
Connection for 2-quadrant application - parallel thyristors
With parallel connected thyristors, the additional board SDCS-REB-2 is needed.
Because of the REB-2 board ex24V and +48V are needed. The power
supply SDCS-POW-4 is not able to give enough power for parallel connected thy-
ristors.
The additional board SDCS-REB-1 can be used, but must not be used. Depending
on the final decision the flat cable from X613 (SDCS-REB-2) has to be connected
to either X613 (SDCS-REB-1) or X513 (SDCS-PIN-51 with SDCS-REB-1 re-
moved).
The figure below shows the configuration for a 2-quadrant bridge with 4 parallel
connected thyristors.
V4
14
SDCS-PIN-41
B C D E F
X1
13
C
G
C
G
C
G
C
G
C
G
C
G
X2
13
A
V4
11
V4
16
V4
13
V4
12
V4
15
V3
1
4
SDCS-PIN-41
B C D E F
X1
1
3
C
G
C
G
C
G
C
G
C
G
C
G
X2
1
3
A
V3
1
1
V3
1
6
V3
1
3
V3
1
2
V3
1
5
V2
14
SDCS-PIN-41
B C D E F
X1
1
3
C
G
C
G
C
G
C
G
C
G
C
G
X2
1
3
A
V2
11
V2
16
V2
13
V2
12
V2
15
V1
14
SDCS-PIN-48
B C D E F
X1
1
3
C
G
C
G
C
G
C
G
C
G
C
G
X2
1
3
A
V1
11
V1
16
V1
13
V1
12
V1
15
U1
SDCS-PIN-51
V1
W1
C1
D1
X22 X122 X23 X24 X25
X1
2 S
X1
3 S
X4
13 S
X3
1
3
S
X1
3
X5
1
3
X1
1
3
X2
1
3
X4
1
3
X3
1
3
S2 S1
X1
2
20
X5
13
X1
13
X2
13
X4
13
X3
13
SDCS-REB-1
X713 X7
13
X6
13
X5
13
X1
13
X2
13
Forward bridge pulse transformer boards
+24VEXT
+48VEXT
0VEXT
X2
SDCS-REB-2
X713
X613
X42
X41
X32
X31
X22
X21
X12
X11
X1
0VEXT
RB_2q_4p_a.dsf
2-quadrant application, parallel thyristors.