Siemens SIMOVERT MASTERDRIVES 6SE7087-6CX86-2BA1 Manual page 15

06.2005
Configuration
Operation and
control options
Siemens AG 6SE7087-6CX86-2BA1
SIMOVERT MASTERDRIVES AFE
Both one and several inverters can be connected to the output.
The maximum connected power of the inverters may amount to 4 times
the rated power of the AFE inverter. The sum of active power extracted
from the network must not exceed the rated power of the AFE, and this
must be ensured by configuration of the system.
The AFE is suitable for coupling several inverters to a common DC
busbar. This allows energy to be transferred between motoring and
generating drives, thus providing a power-saving feature.
In voltage step-up mode, dips in the mains voltage can be
compensated without changing the level of the DC link voltage. This
can be achieved up to 65 % of rated line voltage without additional
components on condition that the power balance defined by Equation 1
can be maintained.
3 V I V I
⋅ ⋅ = ⋅
line max d
Equation 1:
To bridge line voltage dips below 65 % of rated line voltage, the
auxiliary power supply must be supported by an external UPS or similar
to prevent the contactors from dropping out.
The unit can be controlled and operated via
♦ the parameterization unit (PMU)
♦ an optional operator control panel (OP1S)
♦ the terminal strip
♦ a serial interface
In combination with automation systems, the AFE rectifier/regenerative
feedback unit is controlled via optional interfaces and technology
boards.
Operating Instructions
d
Description
2-3