Rated Data And Continuous Operation Of The Converters - Siemens SINAMICS G130 Engineering Manual

SINAMICS S150
Engineering Information

8.2 Rated data and continuous operation of the converters

Main applications
SINAMICS S150 converter cabinets are designed to meet high requirements in terms of dynamic response and
control accuracy and operate with a high-quality vector control. Standard converters are equipped with a sensorless
vector control. SINAMICS S150 converter cabinets are optionally available with a range of different speed encoder
interfaces: SMC10 (option K46 for resolver), SMC20 (option K48 for sin/cos encoder and absolute encoder EnDat)
and SMC30 (option K50 for TTL/HTL incremental encoder). For further information about control performance, please
refer to section "Control properties" in chapter "General Information about Built-in and Cabinet Units SINAMICS
S120".
SINAMICS S150 converter cabinets feature a highly dynamic, pulsed, IGBT-based rectifier / regenerative unit for 4Q
operation. This controls the DC link voltage and stabilizes it at a constant value irrespective of the level of line voltage
fluctuation. The factory setting for the DC link voltage corresponds to 1.5 times the parameterized line supply voltage.
These converters are therefore ideal for operation on unstable power supply systems with a high level of line voltage
fluctuation.
The Clean Power Filter on the line side ensures minimum harmonic effects on the supply in operation. These units
are therefore also ideal for applications which demand an extremely high standard of supply power quality.
Line supply voltages
SINAMICS S150 converter cabinets are available for the following line supply voltages:
·
380 V – 480 V 3AC
·
500 V – 690 V 3AC
The permissible voltage tolerance is ±10 % continuously and -15 % for brief periods (< 1min). Please note that the
output voltage and thus the output power can be kept constant by virtue of the stabilized DC link voltage provided
that sufficient line current reserves are available.
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. 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
SINAMICS Engineering Manual – November 2015
480/528
Ó Siemens AG
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
Load duty cycle definition for high overload
. These are
rated