7
Project Planning of Mains Connection
7.1
General Information
To supply the drive system with power, it is connected to the local supply
mains via the mains connection. For the project planning of the mains con‐
nection, observe the requirements of the supply mains and of the devices
used.
The essential requirements are:
●
Mains voltage U
LN
(depending on mains type) with mains frequency f
LN
,
number of phases and rotary field
●
Mains connected load S
LN
, mains short-circuit power S
k_min
and system
impedance
●
Short-circuit current I
SCCR
, particularly when used in the scope of C-UL
●
Mains circuit breakers and mains contactor
●
Protection systems that can be used, such as residual-current-operated
circuit-breakers and insulation monitoring devices
7.2
Mains Voltage Supply
Permanent mains connection
A permanent connection to the supply mains is required for
Rexroth IndraDrive controllers.
Make sure that all components participating in the mains connec‐
tion are operated in their allowed voltage ranges.
Description
Symbol
Unit
Value of the respective component
Short circuit current rating (UL)
SCCR
A rms
chapter 7.4.2 "Mains Short-Circuit Power"
Nominal mains voltage
U
LN_nenn
V
Reference value for performance data, for ex‐
ample
Mains voltage single-phase
U
LN
V
Voltage of mains must be within the specified
voltage range.
Mains voltage at TN-S, TN-C, TT mains
1)
Phase-to-phase voltage of mains must be within
the specified voltage range; otherwise, use
matching transformer.
Mains voltage at IT mains
1)
Phase-to-phase voltage of mains must be within
the specified voltage range; otherwise, use iso‐
lating transformer with grounded neutral point.
Mains voltage at mains grounded via outer con‐
ductor
1)
For the data of the individual devices, see Project Planning Manual "Rexroth IndraDrive Supply Units and Power Sec‐
tions" → Chapter of the respective device → "Technical Data" → "Basic Data" → table "Data for Mains Voltage Supply".
In TN-S, TN-C, TT, IT mains type and mains grounded via outer conductor:
Rotary field
No rotary field condition
Allowed range of mains frequency
f
LN
Hz
(50…60) ±2
DOK-INDRV*-SYSTEM*****-PR06-EN-P
Rexroth IndraDrive Drive Systems with HMV01/02 HMS01/02, HMD01, HCS02/03
Bosch Rexroth AG
73/309
Project Planning of Mains Connection
