SIEMENS
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Siemens D 35 · 2017
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Options
(continued)
5
SINAMICS G120P Cabinet, converter cabinet units
SINAMICS G120P Cabinet, 75 kW to 630 kW
SINAMICS G120P Cabinet
L07
dv/dt filter compact plus VPL
dv/dt filters compact plus VPL (
V
oltage
P
eak
L
imiter) limit the
voltage rate-of-rise dv/dt to values of <1600 V/
μ
s and the typical
voltage peaks to the following values according to the limit value
curve A to IEC 60034-25: 2007:
•
< 1150 V at
U
line
< 575 V
•
<1400 V at 660 V <
U
line
< 690 V
The dv/dt filter compact plus VPL functionally consists of two
components, the dv/dt reactor and the voltage limiting network
(VPL), which limits voltage peaks and feeds the energy back to
the DC link. Its dimensions are so compact that it can be com-
pletely integrated in the cabinet – even for high power ratings.
A supplementary cabinet is not required.
The use of a dv/dt filter compact plus VPL represents a suitable
method of reducing the voltage load on the motor winding for
line supply voltages up to 690 V to such an extent that special
motor insulation is not required. The bearing currents are also
significantly reduced, meaning that standard motors without
insulated bearings can also be operated on the SINAMICS
G120P Cabinet for all grid connection voltages up to 690 V.
This applies to both Siemens motors and third-party motors.
The voltage drop across the dv/dt filter compact plus VPL is
approximately only 1 %.
dv/dt filters can be used in both grounded (TN/TT) and
non-grounded (IT) systems.
dv/dt filters compact plus VPL are designed for the following
maximum motor cable lengths:
•
Shielded cables 100 m (328 ft) (e.g. Protodur NYCWY)
•
Non-shielded cables 150 m (492 ft) (e.g. Protodur NYY)
Solutions for longer cable lengths (> 100 m (328 ft) shielded,
> 150 m (492 ft) unshielded) are available on request.
Notice:
Operation with output frequencies < 10 Hz is permissible for
max. 5 min.
Note:
Option
L07
cannot be combined with the following options:
•
L08
(motor reactor)
Note:
For converter cabinet units with a rated power from 160 kW,
for space reasons, the option
L62
is not immediately available
when output options
L07
or
L08
are used. This combination is
only available as a special version on request.
L08
Motor reactor
The following applications require the use of a motor reactor:
•
Group drives
•
Ensuring uninterrupted operation on IT networks in the event
of a single-phase short-circuit (only applies to cabinet units
with a power rating of up to 132 kW)
•
Increasing the motor cable length to the following values:
- Shielded cables 300 m (984 ft) (e.g. Protodur NYCWY)
- Non-shielded cables 450 m (1476 ft) (e.g. Protodur NYY)
The values specified are to be understood as guide values, the
actual values depend on the cable type and routing. Solutions
for longer cable lengths (> 300 m (984 ft) shielded, > 450 m
(1476 ft) unshielded) are available on request.
Fundamentally, motor reactors reduce the voltage load on the
motor windings by reducing the voltage gradients at the motor
terminals that occur during converter operation. At the same
time, the capacitive charge/discharge currents that occur at the
converter output when long motor cables are used are reduced.
In this respect, the use of motor reactors with long cable lengths
can have a positive effect on the life expectancy of the motor and
the converter.
The reduced voltage rise in the output circuit also attenuates the
bearing currents in the motor. However, this reduction is usually
not sufficient to be able to dispense with the use of an insulated
NDE bearing in the motor.
In the case of line voltages from 500 V to 690 V, the use of a pure
motor reactor is generally not suitable for improving the in-
creased winding load on the motor by converter operation to
such an extent that special insulation in the motor can be dis-
pensed with. Such an improvement can only be achieved with a
dv/dt filter (option
L07
).
Note:
Option
L08
cannot be combined with the following options:
•
L07
(dv/dt filter compact plus VPL)
Note:
For converter cabinet units with a rated power from 160 kW,
for space reasons, the option
L62
is not immediately available
when output options
L07
or
L08
are used. This combination is
only available as a special version on request.
L13
Main contactor
SINAMICS G120P Cabinet converter cabinet units, versions A
and C can be used with a main contactor. Option
L13
is needed
if a switching element is required for disconnecting the cabinet
from the supply (required for EMERGENCY OFF). The contactor
is controlled internally in the converter. Option
L13
always also
covers the installation of a SITOP 24 V DC power module to be
able to keep the converter in stand-by mode.
Notice:
If there is no 230 V AC power supply in the customer installation,
it is essential to select option
K74
in order to ensure proper func-
tioning of option
L13
.
© Siemens AG 2017