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Bosch Rexroth AG
EMC Measures for Design and Installation
Motor Blower at Mains Filter
Loads at Mains Filter of Drive Sys‐
Shielding Mains Supply Lines in
Control Cabinet
Mains Filters for AC Drives
Grounding
Point of Connection for Equipment
Grounding Conductor at Machine,
Installation, Control Cabinet
Single-phase or three-phase supply lines of motor blowers, that are usually
routed in parallel with motor power cables or interference-susceptible lines,
must be filtered:
●
In drive systems with regenerative supply units, via a separate single-
phase (NFE type) or three-phase filter (HNF type) near the mains con‐
nection of the control cabinet
●
In drive systems with only infeeding supply units, via the available three-
phase filter of the drive system
When switching power off, make sure the blower is not switched off.
Only operate allowed loads at the mains filter of the drive system!
tem
At the three-phase filter for the power connection of regenerative
supply units, it is only allowed to operate the following loads:
●
HMV supply unit with mains choke and, if necessary, mains
contactor
Do not operate any motor blowers, power supply units etc. at the
mains filter of the drive system.
If there is a high degree of interference injection to the mains supply line with‐
in the control cabinet, although you have observed the above instructions (to
be found out by EMC measurement according to standard), proceed as fol‐
lows:
●
Only use shielded lines in area A
●
Connect shields to the mounting plate at the beginning and the end of
the line by means of clips
The same procedure may be required for long cables of more than 2 m be‐
tween the point of power supply connection of the control cabinet and the fil‐
ter within the control cabinet.
Ideally, mount the mains filter on the parting line between area A and B.
Make sure the ground connection between filter housing and housing of the
drive controllers has good electrically conductive properties.
If single-phase loads are connected on the load side of the filter, their current
may be a maximum of 10% of the three-phase operating current. A highly im‐
balanced load of the filter would deteriorate its interference suppression ca‐
pacity.
If the mains voltage is more than 480 V, connect the filter to the output side of
the transformer and not to the supply side of the transformer.
In the case of bad ground connections in the installation, the distance be‐
tween the lines to the grounding points E1, E2 in area A and the other
grounding points of the drive system should be at least d4 = 400 mm, in order
to minimize interference injection from ground and ground cables to the pow‐
er input lines.
See also
6.2.2 Division Into Areas (Zones), page
The equipment grounding conductor of the power cable of the machine, in‐
stallation or control cabinet has to be permanently connected at point PE and
have a cross section of at least 10 mm
equipment grounding conductor via separate terminal connectors (according
to EN 61800-5-1:2007, section 4.3.5.5.2). If the cross section of the outer
conductor is bigger, the cross section of the equipment grounding conductor
must be accordingly bigger.
DOK-INDRV*-KCU02*UL***-IN01-EN-P
Rexroth IndraDrive Mi Electronic Control System KCU02
48.
2
or to be complemented by a second
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