6-6
Planning the electrical connections
DKR Drive Controllers
DOK-DIAX03-DKR********-PR02-EN-P
L1
L2
L3
L1
L2
L3
DKR
AP2DKR
IT mains
L
N
drops off with
AC 230 V
0,75...2,5 mm
2
0,75...2,5 mm
2
F1
control enclosure
grounding potential
N
230V ±10%
50...60Hz
power circuit
breaker
NFD
power circuit breaker:
For primary protection of transformers with a high
degree of inrush peak (e.
g. Siemens,
3VU13 00-1TF00)
Fig. 6-5:
Connection to an ungrounded three-phase system
The drive may only be operated with an ungrounded three-phase system -
except when connected via an isolating transformer - if the machine is
protected with the use of an overvoltage suppressor.
Note:
The information on page 6-13 will help you select appropriate
overvoltage suppressors.
Note:
Operating the drive with an overvoltage suppressor does not
offer the same level of protection as does the use an isolating
transformer. The purchase of big overvoltage suppressors is,
however, much less expensive. Please note that an
overvoltage suppressor, however, is destroyed once used and
then must be replaced!
If the mains voltage is not compatible with the permissible rated power
voltage, then an autotransformer can be used to match the voltages.
Note:
The information in chapter 6-11 will help you dimension the
autotransformer.
Protection with the use of an
overvoltage suppressor
LSA Control S.L. www.lsa-control.com [email protected] (+34) 960 62 43 01
