Planning the electrical installation
38
3ADW000462R0401 DCS880 Hardware manual e d
Configuration C
If a dedicated transformer / isolation transformer is used, it is possible to comply with
certain connecting conditions per Configuration B without using an additional line
reactor. The condition described in Configuration A will then likewise be satisfied,
since the u
k
is > 1 %.
Configuration C1
If 2 or more converters should be supplied by one transformer the final
configuration depends on the number of drives in use and their power
capability. Configuration A or B has to be used, if the drive system
consists of any of the converters H1, H2, H3, H4, H5, H6, H7, H8.
In case if
only
two converters of type H8 are used no line reactors are
necessary because the design of these converters allows that
configuration.
Configuration D
In the case of thyristor converters, frequently transformers are used for voltage
matching. When using an autotransformer for this purpose, additionally install a line
reactor, because the u
k
of commonly used autotransformers is too small.
In case of converters size H1 ... H5 the allowed voltage at the PCC is
600 V
AC
.
Line reactors for converters
The line reactors listed in table below
- have been sized to the units nominal current and frequency (50 / 60 Hz)
- are independent of converter's voltage classification; at some converter types the same line choke
is used up to 690 V line voltage
- are based on a duty cycle
- can be used for DCS880 as armature converter as well as field converter, but rated line choke
current must be considered.
For further information see also
(P
cc
)
Line
PCC
(P
cc
)
....
Netzdr_g.dsf
L
L1
L
L1
L
L1
PCC
Line
