SIMOVERT MASTERDRIVES Vector Control - MEYLE - Meyer ...

Cabinet units
Line filters, line commutating reactors and protective devices
L00 Radiointerference
suppression
filter
L20 Operation from
non-earthed
system
L21 Overvoltage
protection board
L22, Line
L23, commutating
L89 reactor
L87 Insulation
monitor,
non-earthed
systems
L88 Earth-leakage
monitor,
earthed
systems
SIMOVERT MASTERDRIVES Vector Control
6SE71 ConverterCabinet Units
Radio-interference suppression
filters to EN 55 011
Class A1 (for industrial applications)
are available for the
cabinet units in the power
range 37 kW to 1500 kW.
The option, operation from a
non-earthed system (IT systems,
code L20), must be
ordered separately in the
case of converters for singlequadrant
operation, 6-pulse,
in the power range from
The overvoltage protection
board protects the semiconductors
of the supply-side
converter against overvoltages,
such as can occur
when the converter trans-
In the case of converters
with single-quadrant operation,
a line commutating
reactor with a relative impedance
voltage of2%is
built in and, in the case of
converters for four-quadrant
operation, with a relative
impedance voltage of 4 %.
Operation without a line
commutating reactor (code
L22) for single-quadrant and
The insulation monitor
detects the insulation
resistance in non-earthed
systems (IT systems). In addition,
it detects all insulation
faults in the DC link and on
the motor-side of the converter.
If the insulation
resistance falls below a minimum
value, a signal is output
to the terminal.
The earth-leakage monitor is
designed as a summation
current transformer and
monitors the earth-fault cur-
In order to enable connection
of the shield for the radio-interference
suppression filter,
an EMC shield bus (code
M70) is integrated at the
converter output.
45 kW to 315 kW/
380 V to 480 V;
37 kW to 315 kW/
500Vto600V;
55 kW to 400 kW/
660 V to 690 V.
former is tripped on the
primary side of the system.
The 7YY30 overvoltage protection
boards are equipped
with varistors and protective
thyristors. If an excessively
four-quadrant operation is
only permissible if the relative
impedance voltage of
the supply system is greater
than 6 %. In the case of
12-pulse supply, at least one
line commutating reactor
with2%relative impedance
voltage is necessary per
system or a converter
transformer in the form of a
three-winding transformer
N.B.:
The insulation monitor
detects the insulation
resistance of all parts of the
system connected on the
secondary side of the converter
transformer and only
needs to be used once per
branch. Depending on the
supply voltage, the insulation
monitor on the branch functions
as follows:
� If the insulation monitor is
supplied with the option
K74, the insulation monitor
rent of an earth fault in
earthed systems (TN and TT
systems). If the earth-fault
current exceeds a maximum
Description of the options
The radio-interference suppression
filters under option
L00 can be used for earthed
systems. Radio-interference
suppression filters for nonearthed
systems are available
on request.
This option is standard in the
case of all other cabinet
units.
high overvoltage occurs in
the input circuit, an appropriate
signal is generated at the
terminal.
must be used (see
Engineering Information
Section 6). The difference
between the two output
voltages should be less than
0.5 %.
In the case of converters
with self-commutated,
pulsed rectifier/regenerative
units, the line commutating
reactor is already integrated
in the line filter.
monitors the converter and
the preceding branch only
when the converter has
been switched on.
� In the case of external
supply to the insulation
monitor with 230 V AC, the
insulation monitor only
monitors the preceding
branch when the converter
has been switched off.
If the converter has been
switched on, it is also monitored.
value, a signal is output to
the terminal.
Siemens DA 65.10 · 2003/2004
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