15.3
Determining Components in the Mains Connection
15.3.1
Determining the Mains Choke
When using mains chokes, take their effect on the connected drive control‐
lers into account. Due to their inductance, mains chokes have a smoothing
effect on the current and thereby reduce harmonics.
Take the nominal current of the mains choke into account to have the induc‐
tance of the mains choke available.
Some mains chokes are assigned to certain drive controllers (see technical
data of the drive controller "Data for mains voltage supply → Assigned type of
mains choke").
15.3.2
Determining the Mains Filter
Criteria for Selecting the Mains Fil‐
ter
Take the following criteria into account for selecting the appropriate mains fil‐
ter:
●
EMC limit value class on site
●
Ambient conditions on site
●
Harmonics on mains voltage on site
●
Loading by mains voltage and mains frequency on site
●
Loading by harmonics on site
●
Loading by mains-side phase current
●
Total length of connected power cables
●
Sum of leakage capacitances
●
Clock frequency of drive controller
How to Proceed for Selecting the
Mains Filter
The selection of the mains filter is significantly determined by the operating
conditions. How to proceed for selecting the mains filter:
1.
Determine the required EMC limit value class for the application.
2.
Determine the maximum applied mains voltage.
Observe that not all Rexroth IndraDrive mains filters are suited for a
mains voltage of 3 AC 500 V.
Check whether the mains voltage of the mains filter is loaded with har‐
monics and still allowed for the mains filter.
Allowed operating data depending on existing harmonics: See
18.3 "Emitted Harmonics on Mains Current and Mains Voltage" on
If necessary, reduce the harmonics on site.
3.
Determine the kind of mains connection, such as central supply, group
supply etc. (to do this, it is useful to outline the involved components
and their interaction).
4.
Calculate the mains-side phase current of the mains filter.
Procedure for calculating the mains-side phase current: See
15.2.1 "Calculating the Mains-Side Phase Current " on page 260
For selecting the components, calculate the effective rms value.
Check or determine the maximum occurring ambient temperature. Se‐
lect a mains filter with higher nominal current, when the ambient temper‐
ature is above 45 °C.
5.
Select a mains contactor the nominal current of which does not exceed
nominal current of the mains filter.
Bosch Rexroth AG
DOK-INDRV*-SYSTEM*****-PR06-EN-P
Rexroth IndraDrive Drive Systems with HMV01/02 HMS01/02, HMD01, HCS02/03
264/309
Calculations
