Mannesmann Rexroth DKR02 - Dimensioning; Mains Fuses and Lead Cross Sections

DKR Drive Controllers Planning the electrical connections 6-9
DOK-DIAX03-DKR********-PR02-EN-P
6.5 Dimensioning
Mains fuses and lead cross sections
Mains fuses and the lead cross sections of the power connections are
dependent upon the continuous power of the motor which has been
mounted. They have to be dimensioned in accordance with the indications
in the motor project planning manuals.
CAUTION
Failure or malfunction caused by mains
connection values that fall below the minimum
values!
⇒
The values mustn’t ever fall below the data in the
table below. Always dimension the mains connection
at least in accordance with the power effectively
required. When dimensioning the mains connection,
allow for sufficient reserves!
Type of drive
controller
Minimum mains fuse F1, type Minimum lead cross
section in mm²
DKR03.1-100-... 3 x NH25gl 4
DKR03.1-200-... 3 x NH35gl 6
DKR02.1-200-... 3 x NH50gl 10
DKR02.1-300-... 3 x NH63gl 16
DKR04.1-300-... 3 x NH80gl 25
DKR04.1-400-... 3 x NH80gl 25
Fig. 6-8: Minimum data for mains fuses and lead cross sections
Calculate the lead cross sections required in terms of the actual motor
power and the highest ambient temperatures. Follow the steps described
below:
1. Determine the mains current I
NetzDKR
using the formula:
DauerMotorNetzDKR
PI *8,1=
I
NetzDKR
: mains current [A]
P
DauerMotor
: (effectively required) continuous output of the motor [kW]
Fig. 6-9: Formula to determine the mains power
Note: The mains power (I
NetzDKR
) is also required in order to
determine the mains filter NFD. With regard to the use and
dimensions of the mains filter please see the documentation
on "Electromagnetic Compatibility (EMC) in Drive and Control
Systems".
LSA Control S.L. www.lsa-control.com comercial@lsa-control.com (+34) 960 62 43 01