Siemens SIMOVERT MASTERDRIVES Motion Control Instructions De Service page 191

02.2008
Rule 15
Rule 16
Rule 17
Rule 18
Rule 19
Rule 20
Siemens AG 6SE7087-7JP50
SIMOVERT MASTERDRIVES
A noise suppression filter should always be placed close to the fault
source. The filter should be connected to the mounting plate etc. over a
large surface area. A bare metal mounting panel (e.g. manufactured
from stainless steel, galvanized steel) is best, as electrical contact is
established through the entire mounting surface. If the mounting panel
is painted, the paint has to be removed at the screw mounting points for
the frequency converter and the noise suppression filter to ensure good
electrical contact.
To limit the interference emission the cables between the filter output,
the line commutating reactor and the converter should be shielded.
The incoming and outgoing cables of the radio interference suppression
filter have to be spatially separated/isolated.
In order to limit the noise emitted, all variable-speed motors have to be
connected-up using shielded cables, with the shields being connected
to the respective housings at both ends in a low-inductive manner
(through the largest possible surface area). The motor feeder cables
also have to be shielded inside the cabinet or at least shielded using
grounded partitions. Suitable motor feeder cable e.g. Siemens
PROTOFLEX-EMV-CY (4 x 1.5 mm
Cables with steel shields are unsuitable.
A suitable PG gland with shield connection can be used at the motor to
connect the shield. It should also be ensured that there is a low-
impedance connection between the motor terminal box and the motor
housing. If required, connect-up using an additional grounding
conductor. Do not use plastic motor terminal boxes!
A line reactor has to be installed between the radio interference
suppression filter and the SIMOVERT MASTERDRIVES.
The line supply cable has to be spatially separated from the motor
feeder cables, e.g. by grounded partitions.
The shield between the motor and SIMOVERT MASTERDRIVES must
not be interrupted by the installation of components such as output
reactors, sinusoidal filters, dv/dt filters, fuses, contactors. The
components must be mounted on a mounting panel which
simultaneously serves as the shield connection for the incoming and
outgoing motor cables. Grounded partitions may be necessary to shield
the components.
In order to limit the radio interference (especially for limit value class
"First environment "), in addition to the line supply cable, all cables
externally connected to the cabinet must be shielded.
Examples of these basic rules:
Operating Instructions
Installation in Conformance with EMC Regulations
2 2
... 4 x 120 mm ) with Cu shield.
6-3