Rated Data Of Converters For Drives With Low Demands On Control Performance - Siemens SINAMICS G130 Engineering Manual

4.2 Rated data of converters for drives with low demands on control performance

Main applications
SINAMICS G130 converter Chassis units are designed primarily for applications with low to medium requirements of
dynamic response and control accuracy and are usually operated in sensorless vector control mode. They can
operate asynchronous motors as well as permanent-magnet synchronous motors in sensorless vector control mode
without encoder.
For applications that require a higher standard of control performace, i.e. where the control accuracy is more
important than the dynamic response, SINAMICS G130 converter Chassis units can be equipped with an SMC30
speed encoder interface which enables them to operate asynchronous motors with TTL / HTL incremental encoders.
SINAMICS G130 converter Chassis units are basically incapable of regenerative feedback. For applications where
the drive has to operate in regenerative mode for brief periods, it is possible either to activate the V
to install braking units.
Line supply voltages
SINAMICS G130 Chassis are available for the following line supply voltages:
·
380 V – 480 V 3AC
·
500 V – 600 V 3AC
·
660 V – 690 V 3AC
The permissible voltage tolerance is ±10 % continuously and -15 % for brief periods (< 1 min). In the case of line
undervoltages within the specified tolerances, the available output power will drop accordingly unless additional
power reserves are available to increase the output current.
Usable output currents
The output currents specified in the selection and ordering data can be utilized over the entire output frequency or
speed range. However, time restrictions dependent on the relevant application do apply with operation at low output
frequencies of < 10 Hz with simultaneously high output currents of > 75 % of the rated current I
described in section "Power cycling capability of IGBT modules and inverter power units" in chapter "Fundamental
Principles and System Description".
The specified rated output current is the maximum continuous thermally permissible output current. The units have
no additional overload capacity when operating at this current.
Overload capability, load duty cycle definitions
When a drive is required to overcome breakaway torques or is subjected to high surge loads, its configuration must
take these factors into account. In such instances, it must be operated on the basis of a base load current which is
lower than the rated output current. Sufficient overload reserves are available for this purpose. The load duty cycles
for operation with low and high overloads are defined below.
·
The base load current I
·
The base load current I
These overload values apply on condition that the converter is operated at its base load current before and after the
period of overload on the basis of a load duty cycle duration of 300 s in each case.
Load duty cycle definition for low overload
for low overload is based on a load duty cycle of 110% for 60 s or 150% for 10 s.
L
for a high overload is based on a load duty cycle of 150% for 60 s or 160% for 10 s.
H
SINAMICS Engineering Manual – November 2015
Engineering Information
Load duty cycle definition for high overload
SINAMICS G130
controller or
dc max
. These are
rated
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