Mannesmann Rexroth DKR02, Project Planning Manual

Page: 66 / 112

6-12
Planning the electrical connections DKR Drive Controllers
DOK-DIAX03-DKR********-PR02-EN-P
Isolating transformers
CAUTION
Damage to the isolating transformer if it is not
sized large enough!
⇒
Please note the following guidelines.
⇒
Dimension the power S
Netz
of a possibly isolating transformer in terms
of the rated motor power or at least, however, in terms of the actual
continuous motor power (calculation: see Fig. 6-11).
⇒
Make sure that the power of the isolating transformer, as dependent
upon the drive, does not drop below the values listed in the following
table.:
Type of drive controller Minimum power of the isolating
transformer (S
Netz
) [kVA]
DKR03.1-100-... 25
DKR03.1-200-... 40
DKR02.1-200-... 50
DKR02.1-300-... 65
DKR04.1-300-... 80
DKR04.1-400-... 100
Fig. 6-13: Minimum power of the isolating transformer depending on the drive
controller in use
⇒
Make sure that the inductive components of the relative short-circuit
voltage u
KX
are less than 4 % (calculation: see Fig. 6-12).
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