Installation and Connection
CTW900 | 39
NOTE!
The line voltage must be compatible with the converter power supply range. Check the product
nameplate for the allowed operation.
NOTE!
Power factor correction capacitors are not needed at the input (R/S/T) and must not be installed at
the output (A1/B2).
5.3.2
External Supply for the Field
The CTW900 comes from the factory with the field bridge internally supplied by the same power supply circuit of
the armature (R/S/T). In case the input voltage of the armature is too high for the motor field, it is possible to
supply the field circuit with a different source, by means of connector X3.
Figure 5.4
- Field supplied internally
For supply the field externally :
■
with the converter powered down, remove the field protection fuses located on the electronic interface board
IC900 (F2 and F3);
■
connect the specific cable for the field external supply (supplied together with the converter) between
connector X3 and terminals F_X3 and N_X3, located on the side of the field fuse holder.