7.3.5
Mains Grounded via Outer Conductor (Corner-Grounded Delta Mains)
I =
Isolation of all active parts from ground, connection of one phase
‑ generally phase V - to ground or via an impedance R
E
T =
Exposed conductive parts directly grounded, independent of ground‐
ing of current source (station ground)
Fig.7-6:
Mains Grounded via Outer Conductor
Notes on Project Planning
The EMC requirements are only complied with by specific measures (special
mains filters, among other things).
Mains filters HNF01, NFD at mains grounded via outer conductor
HNF01.1 or NFD03.1 mains filters are not suited for operation on
mains grounded via outer conductor. Use isolating transformers.
Allowed mains connection voltage: See technical data of the re‐
spective device
7.4
Mains Short-Circuit Power and Mains Connected Load
7.4.1
General Information
Apart from the mains connected load, observe the following corridor of the
mains short-circuit power for the mains connection:
●
Minimum required mains short-circuit power (mains connected load) for
interference-free operation
The smaller the mains short-circuit power, the greater the mains pollu‐
tion due to the load current with harmonics on the supply voltage of the
device. This can disturb both the device and other devices at the same
mains node.
Minimum mains short-circuit power is required to limit mains pollution
and to have sufficiently high voltage for realizing the drive performance.
●
Maximum allowed mains short-circuit power (for device protection)
The higher the mains short-circuit power, the greater the short-circuit
currents occurring in the case of error.
Use mains chokes to limit the short-circuit currents in the case of high
mains short-circuit power S
k
. .
DOK-INDRV*-SYSTEM*****-PR06-EN-P
Rexroth IndraDrive Drive Systems with HMV01/02 HMS01/02, HMD01, HCS02/03
Bosch Rexroth AG
79/309
Project Planning of Mains Connection
