SINAMICS G120
Inverter chassis units 0.37 kW to 132 kW (0.5 hp to 200 hp)
SINAMICS G120 chassis units
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Siemens D 11.1 · 2008
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Design (continued)
Power Modules
The following Power Modules are available for SINAMICS G120
inverter chassis units:
PM240 Power Modules
PM240 Power Modules feature an integrated brake chopper and
are designed for drives without energy recovery capability to the
supply. Generator energy produced during braking is converted
to heat via externally connected braking resistors.
PM250 Power Modules
PM250 Power Modules use an innovative circuit design which al-
lows line-commutated energy recovery to the supply. This inno-
vative circuit permits generator energy to be fed back into the
supply system and therefore saves energy.
PM260 Power Modules
PM260 Power Modules also use an innovative circuit design
which allows line-commutated energy recovery to the supply.
This innovative circuit permits generator energy to be fed back
into the supply system and, therefore, saves energy. The PM260
Power Modules also have an integrated sine-wave filter that
limits the rate of rise of voltage and the capacitive charge/dis-
charge currents usually associated with converter operation.
Line-side power components
The following line-side power components are available for
SINAMICS G120 inverter chassis units:
Line filters
The Power Module complies with a higher radio interference
class with one additional line filter.
Line reactors (for PM240 Power Modules only)
A line reactor reduces the system perturbations caused by har-
monics. This is valid in particular for low power supplies (system
fault level
u
K
> 1 %).
Recommended line components
This is a recommendation for further line-side components, such
as fuses and circuit-breakers (line-side components must be di-
mensioned in accordance with IEC standards). Further informa-
tion about the listed fuses and circuit-breakers can be found in
Catalogs LV 1 and LV 1 T.
DC link components
The following DC link components are available for SINAMICS
G120 inverter chassis units:
Braking resistors (for PM240 Power Modules only)
Excess power in the DC link is dissipated via the braking resistor.
The braking resistors are designed for use with PM240 Power
Modules. They are equipped with an integrated brake chopper
(electronic switch).
Load-side power components
The following load-side power components are available for
SINAMICS G120 inverter chassis units. This means that during
operation with output reactors or LC filters or sine-wave filters,
longer, shielded motor cables are possible and the motor ser-
vice life can be increased:
Output reactors (for PM240 Power Modules only)
Output reactors reduce the voltage loading on the motor wind-
ings. At the same time, the capacitive charge/discharge cur-
rents, which place an additional load on the power section when
long motor cables are used, are reduced.
Sine-wave filter (available soon, not available for PM260 Power
Modules)
The sine-wave filter limits the rate of rise of voltage and the ca-
pacitive charge/discharge currents usually associated with con-
verter operation. An output reactor is not required.
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