SINAMICS G120
Standard inverters 0.37 kW to 250 kW (0.5 hp to 400 hp)
SINAMICS G120 standard inverters
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Siemens D 11.1 · 2009
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Design
Power Modules
The following Power Modules are available for the
SINAMICS G120 standard inverters:
PM240 Power Modules
PM240 Power Modules (0.37 kW to 250 kW / 0.5 hp to 400 hp)
feature an integrated brake chopper (for frame size FSGX exter-
nal) and are designed for drives without energy recovery capa-
bility. Generator energy produced during braking is converted to
heat via externally connected braking resistors.
PM250 Power Modules
PM250 Power Modules (7.5 kW to 90 kW / 10 hp to 125 hp) have
an innovative circuit design which allows line-commutated en-
ergy recovery back into the line supply. This innovative circuit
permits generator energy to be fed back into the supply system
and therefore saves energy.
PM260 Power Modules
PM260 Power Modules (11 kW to 55 kW / 15 hp to 75 hp) also
have an innovative circuit design which allows line-commutated
energy recovery back into the line 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 charging/discharging currents usually asso-
ciated with inverter operation.
Line-side power components
The following line-side power components are available for
SINAMICS G120 standard inverters:
Line filters
With one of the additional line filters, the Power Module reaches
a higher radio interference class.
Line reactors (for PM240 Power Modules only)
A line reactor reduces the system perturbations caused by
harmonics. This particularly applies in the case of weak line
supplies (line supply short-circuit power u
K
>1%).
Recommended line components
This is a recommendation for additional line-side components,
such as fuses and circuit-breakers (line-side components must
be dimensioned in accordance with IEC standards). Additional
information 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 the
SINAMICS G120 standard inverters:
Braking Modules (only for PM240 Power Modules, frame
size FSGX)
A Braking Module and the matching external braking resistor are
required to bring drives with a PM240 Power Module, frame
size FSGX to a controlled standstill in the event of a power failure
(e.g. emergency retraction or EMERGENCY STOP Category 1)
or limit the DC link voltage during a short period of generator
operation. The Braking Module includes the power electronics
and the associated control circuit.
Braking resistors (for PM240 Power Modules only)
Excess energy in the DC link is dissipated in the braking resistor.
The braking resistors are designed for use with PM240 Power
Modules. They are equipped with an integrated brake chopper
(electronic switch). There is an optional plug-in Braking Module
for frame size FSGX.
Load-side power components
The following load-side power components are available for the
SINAMICS G120 standard inverters. This means that during op-
eration with output reactors or sine-wave filters, longer, shielded
motor cables are possible and the motor service life can be ex-
tended:
Output reactors (for PM240 and PM250 Power Modules only)
Output reactors reduce the voltage stress on the motor wind-
ings. At the same time, the capacitive charging/discharging cur-
rents, which place an additional load on the power unit when
long motor cables are used, are reduced.
Sine-wave filter (not for PM260 Power Modules)
The sine-wave filter limits the rate of rise of voltage and the
capacitive charging/discharging currents that usually occur with
inverter operation. An output reactor is not required.
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