ECODRIVE DKC02.1 Drive Controller DST / DLT transformers 9-1
DOK-ECODRV-DKC02.1****-PRJ2-EN-P
9 DST / DLT transformers
9.1 Selection
Transformers are only needed if the systems voltage exceeds the per-
mitted rated voltage of the DKC.
For grounded power supply lines, the line voltage is matched to the rated
voltage of the units using autotransformers which are suitable for one
specific output voltage range (see Fig. 9-1).
To match the voltage for ungrounded power supply lines, always connect
isolating transformers to prevent excess voltages between the outer con-
ductor and ground.
This document does not offer a product program to select suitable isolat-
ing transformers. (Request this information if needed)
9.2 Autotransformers for DKC**.*-040-7-FW
Select an autotransformer suited to both the line voltage and the power
requirements of the system.
Proceed with the selection as follows:
⇒
Determine the rating group and read the gearing ratio "i" using the re-
quired rated line voltage range from the diagram in Fig. 9-1.
⇒
Calculate the actual transformer output voltage using the rated line
voltage and the gearing ratio "i".
⇒
Check drive data. The output voltage of the transformer affects the
drive data. See documentation "ECODRIVE Servodrives DKC with
MKD"- Selection lists - (see pg. 3 of the supplementary documenta-
tion).
⇒
Select a three-phase autotransformer via the required connected load.
Grounded power supply lines
Ungrounded power supply lines
LSA Control S.L. www.lsa-control.com comercial@lsa-control.com (+34) 960 62 43 01
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