Accessories; Dcf803-0035 And Fex 425 Internal - ABB DCS800 Hardware Manual

Accessories

DCF803-0035 and FEX 425 internal

The field exciter DCF803 0035 and FEX425intern are half controlled three-phase field converter. Both
field converters are based on the same controller board SDCS FEX4. The board is equipped with own
synchronization and current control. The current measurement circuit is automatic scaled based on
rated motor field current. The field exciter is fully controlled and monitored via serial communication
from armature converter.
The field exciter is prepared to operate as three phase or single phase converter. Single phase
operation is provided with terminals U and W
Setting of switchable burden
resistors by rated field current
Layout of the SDCS-FEX-4 board
I
Fact
U
V
W
X110
P2
T113
X100
V110
X101
3ADW000194R0201 DCS800 Hardware Manual e b
measurement channel
5 A
35 A
Fex4x1.dsf
240
P1
T110
T112
T111
R106
R107
R108
Field
U730
D800
U731
X7
105
S800
S801
Fex4_layout.dsf
Accessories