Line Filters; Components At The Dc Link; Braking Units; Load-Side Components And Cables - Siemens SINAMICS G130 Engineering Manual

SINAMICS S150
Engineering Information
8.6.2

Line filters

SINAMICS S150 converter cabinet units are equipped as standard with an integrated line filter for limiting conducted
interference emissions in accordance with EMC product standard EN 61800-3, category C3, for motor cable lengths
of up to 300 m (applications in industrial areas or in the "second" environment).
The optional line filter (option / L00) renders converters with motor cable lengths up to 300 m suitable for category C2
applications in accordance with product standard EN 61800-3 (installation in residential areas or in the "first"
environment).
To ensure that the converters comply with the limits defined for the above categories, it is absolutely essential that
the relevant installation guidelines are followed. The efficiency of the filters can be guaranteed only if the installation
instructions with respect to grounding and shielding are observed. For further details, please refer to section "Line
filters" in chapter "Fundamental Principles and System Description" and to chapter "EMC Installation Guideline".
Line filters can be used only on converters that are connected to grounded supply systems (TN or TT with grounded
neutral). On converters connected to non-grounded systems (IT networks), the standard integrated line filter must be
isolated from PE potential. This is done by removing the appropriate metal clip when the drive is commissioned (see
operating instructions). It is not possible to use the optional line filters (option L00) in non-grounded systems to
achieve compliance with the limits defined for category C2 by EMC product standard EN 61800-3.

8.7 Components at the DC link

8.7.1

Braking units

Braking units (Braking Modules and external braking resistors) can be used optionally on SINAMICS S150 fed drives
which need to be stopped after a power failure, e.g. in the case of an emergency retraction or EMERGENCY OFF
according to category 1.
The use of braking units to support the rectifier/regenerative feedback unit in regenerative operation is also possible,
for example, in cases where it is permissible to recover only a certain fraction of the infeed power to the line supply
system. In this instance, it is possible to limit the regenerative feedback current accordingly and the braking unit must
be capable of absorbing the excess regenerative power. However, this option should be utilized only if the converter
is operating on a relatively stiff mains supply.
Braking Modules are available as options L61 and L64 with a continuous braking power of 25 kW (P
and as options L62 and L65 with a continuous braking power of 50 kW (P
the power electronics and associated control circuitry. They are designed for mounting in the power blocks of S150
cabinet units. They are cooled by the cooling air discharged by the power units. The associated braking resistors
must be mounted outside the cabinet.
When selecting options L61 – L65, please take into account that Braking Modules for 500 V to 600 V 3AC (L64, L65)
or for 660 V to 690 V 3AC (L61, L62) must be selected (depending on the line supply voltage on site) for SINAMICS
S150 converters with the supply voltage range of 500 V to 690 V 3AC.
For further information about braking units as well as dimensioning rules, please refer to chapters "Converter Chassis
Units SINAMICS G130" and "Converter Cabinet Units SINAMICS G150". The chapters also give examples of how to
calculate the required Braking Modules and braking resistors.

8.8 Load-side components and cables

8.8.1

Motor reactors

The fast switching of the IGBTs in the inverter causes high voltage rate-of-rise dv/dt at the inverter output. If long
motor cables are used, these voltage gradients increase the current load on the converter output due to capacitive
charge/discharge currents. The length of cable which may be connected is therefore limited.
The high voltage rate-of-rise and the resulting voltage spikes at the motor terminals, increase the voltage stress at
the motor winding in comparison to direct line operation. The motor reactors (option L08) reduce the capacitive
charge/discharge currents in the motor supply cables and limit the voltage rate-of-rise dv/dt at the motor terminals
according to the motor cable length.
For a more detailed description, please refer to the section "Motor reactors" of the chapter "Fundamental Principles
and System Description".
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Ó Siemens AG
power 200 kW). Braking Modules contain
20
power 100 kW)
20