SINAMICS G120
Standard inverters 0.37 kW to 250 kW (0.5 hp to 400 hp)
PM250 Power Modules –
7.5 kW to 75 kW (10 hp to 100 hp)
4/50
Siemens D 11.1 · 2009
4
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Overview
Example: PM250 Power Modules frame sizes FSC to FSF
The PM250 Power Module features an absolutely unique tech-
nology – Efficient Infeed Technology. This feature provides the
ability to feed energy back into the supply system in the gener-
ator mode (electronic braking) so that the energy is not wasted
in a braking resistor. This saves space in the control cabinet. The
time-consuming process of dimensioning the braking resistor
and the expense of the extra wiring are eliminated. Furthermore,
heat losses in the control cabinet are reduced.
The innovative circuit design used in Efficient Infeed Technology
reduces the line harmonics. There is no need to use an optional
line reactor at the supply infeed. This saves space and costs for
engineering and procurement.
The PM250 Power Module is also suitable for use in safety-ori-
ented applications. In conjunction with a Fail-safe Control Unit,
the drive can be turned into a Safety Integrated Drive (see Con-
trol Units).
The permissible cable lengths between inverter and motor are
limited. Longer cables can be used if output reactors are con-
nected (see load-side power components).
Frame sizes FSD to FSF of the PM250 Power Modules are avail-
able both with as well as without integrated class A line filter.
For frame size FSC of PM250 Power Module with an integrated
class A line filter, an additional class B base filter is available for
achieving class B (see line-side power components).
The PM250 Power Modules with integrated class A line filter are
suitable for connection to TN supply systems. Power Modules
without integrated line filter can be connected to grounded (TN,
TT) and non-grounded (IT) supply systems.
Overview of how customers benefit from Efficient Infeed
Technology
For more detailed information, please refer to the part Highlights,
in section Efficient Infeed Technology.
Standard
Technology
Efficient Infeed
Technology
G_D011_EN_00182
Line reactor
Braking resistor
Configuration
overhead
Generated
harmonics
Heat generated
when braking
Required
Required
Standard
Standard
Yes
Not required
Not required
Low
Minimal
No
Power infeed
Power consumption
Energy efficiency
Reactive power
compensation
Installation outlay
Standard
Standard
Standard
No
Standard
Approx. 22%
less
Approx. 22%
less
Good
Yes
Low
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