2.4
Field Supplies
General data
SDCS-FEX-1
Diode bridge
6 A rated current
Internal minimum field cur-
rent monitor, requiring no
adjustment.
Construction and compo-
nents have been designed
for an insulation voltage of
600 V AC.
Output voltage U
A
:
8
8
72/
$
9
=
+
*
* ,
100%
100%
0 9
TOL = tolerance of line voltage in %
Recommendation:
Field voltage ~ 0,9 * U
V
SDCS-FEX-2
Half-controlled thyristor/
diode bridge (1-Q)
Microprocessor control,
with the electronic system
being supplied by the ar-
mature-circuit converter.
Construction and compo-
nents have been designed
for an insulation voltage of
600 V AC.
Output voltage U
A
:
see SDCS-FEX-1
Recommendation:
Field voltage 0.6 to 0.8 *U
V
DCF 503
Half-controlled thyristor/
diode bridge (1-Q)
Microprocessor control
with the control electron-
ics being supplied sepa-
rately (115/230 V/1-ph).
Construction and compo-
nents have been designed
for an insulation voltage of
690 V AC.
DCF 504
like DCF 503, but
fully-controlled antiparallel
thyristor bridges (4-Q)
Output voltage/Recom-
mendation:
see SDCS-FEX-2
DCF 601/602
This field power converter is
used mainly for armature-cir-
cuit converters with rated
currents of 2050 to 5150 A. In
this case the DCF 600 has to
be activated for field supply
by the software. The rated
currents are the same as with
the DCS 600-0025/0520 A
units with 500 V/3-ph supply
voltage.
Output voltage U
A
respec-
tively U
di0
:
see table 2.2/1
Recommendation:
Field voltage 0.5 to 1.1 *U
V
Unit type
Output
Supply
Installation
Remarks
current I
DC
➀
voltage
site
[A]
[V]
SDCS-FEX-1-0006
0.02...6
110V -15%...500V/1-ph +10%
internal
external fuse, 6 A
⇒
I
Frated
SDCS-FEX-2-0016
0.3...16
110V -15%...500V/1-ph +10%
internal
ext. fuse, reactor; for C1: 0.3 ... 8 A
➀
, not to be used for C4 mod.!
DCF 503-0050
0.3...50
110V -15%...500V/1-ph +10%
external
DCF 504-0050
0.3...50
110V -15%...500V/1-ph +10%
external
DCF 60x-xxxx-x1-15 xxxxx needs additional overvoltage components (DCF 505/506). For more infformation see publication
Technical Data.
➀
Current reduction see also
2.1 Environmental conditions Fig.: 2.1/1 and 2.1/2
Table 2.4/1: Table of field power converter unit types
auxiliary supply (115/230V) if necessary via matching transformer;
fuse external; Dimensions HxWxD: 370x125x342 [mm]
All field power converters (except for the SDCS-FEX-1) are
controlled by the armature-circuit converter via a serial inter-
face at a speed of 62.5 kBaud. This interface serves to
parameterize, control and diagnose the field power converter
and thus provides an option for exact control. Moreover, it
enables you to control an internal (SDCS-FEX-2) and an
external (DCF 503/504) or two external field supply units (2 x
DCF 503/504). The respective software function required is
available in every DC power converter.
Field power converter types
This unit provides an option for
field reversal and fast-response
excitation. In the steady-state con-
dition, the fully-controlled bridge
runs in half-control-
led mode so as to
keep the voltage
ripple as low as
possible. With a
quickly alternating
field current, the
bridge runs in fully-
controlled mode.
Currents from 6 to 500 A
Minimum field current monitor
Integrated external field power converter or completely
separate switchgear cubicle
2-phase or 3-phase model
Fully digital control (except for the SDCS-FEX-1)
We recommend integrating an autotransformer in the field
power converter's supply circuit to adjust the AC input voltage
and reduce the voltage ripple in the field circuit.
II F 2-8
