Ground Connections - Bosch REXROTH IndraDrive HMV01 Operating Instructions Manual

70/81 Bosch Rexroth AG
EMC Measures for Design and Installation
With cable duct
B Area B
C Area C
1 Cable duct for mains connection lines
2 Shield connection of motor power cable via
clips at least at one point; alternatively, at
the device or on mounting plate at control
cabinet
3 Cable duct for motor power cables
Fig.6-3: Routing of Motor Power Cables With Cable
Duct
6.3

Ground Connections

Housing and Mounting Plate
Connection Elements
Ideally, the outlet of the motor power cables at the control cabinet should be
provided in a distance of at least d3 = 200 mm from the (filtered) power sup‐
ply cable.
Inverter - Routing the Motor Power Cables
Without cable duct
B
C
1
2
3
Fig.6-4:
Fig.6-5: Routing of Cables for Inverter
By means of appropriate ground connections, it is possible to avoid the emis‐
sion of interference, because interference is discharged to ground on the
shortest possible way.
Ground connections of the metal housings of EMC-critical components (such
as filters, devices of the drive system, connection points of the cable shields,
devices with microprocessor and switching power supply units) have to be
well contacted over a large surface area. This also applies to all screw con‐
nections between mounting plate and control cabinet wall and to the mount‐
ing of a ground bus to the mounting plate.
The best solution is to use a zinc-coated mounting plate. Compared to a lac‐
quered plate, the connections in this case have a good long-time stability.
For lacquered mounting plates, always use screw connections with tooth lock
washers and zinc-coated, tinned screws as connection elements. At the con‐
nection points, remove the lacquer so that there is safe electrical contact over
a large surface area. You achieve contact over a large surface area by
means of bare connection surfaces or several connection screws. For screw
connections, you can establish the contact to lacquered surfaces by using
tooth lock washers.
DOK-INDRV*-HMV01******-IT01-EN-P
Rexroth IndraDrive Supply Units HMV01
Area B
Area C
Cable duct for mains connection lines
Shield connection of motor power cable via
clips at least at one point; alternatively, at
the device or on mounting plate at control
cabinet
Control cabinet outlet of motor power cables
Routing of Motor Power Cables Without Ca‐
ble Duct