Siemens SINAMICS G120C Operating Instructions Manual page 33

Some restrictions apply for operation:
Table 3- 2
Property
Firmware
Hardware
Applications
Speed of the motor
Switching on when motor
is rotating
Safety Integrated
Ambient temperature of
motor
SINAMICS G120C converter
Operating Instructions, 07/2015, FW V4.7 SP3, A5E34263257B AC
Restrictions for operation with encoderless synchronous motors
Restriction
Firmware version ≥ FW V4.7 SP3
Frame size FSAA: all versions
•
Frame size FSA: from version C02
•
Frame sizes FSB and FSC: From version C01
•
Suitable for applications for steady-state operation in the range of the
rated motor speed:
Conveyor drives
•
Pumps
•
Fans
•
Speed ≤ rated motor speed
•
Operation is not permitted in field weakening.
In steady-state operation ≥ 15 % of the rated speed.
•
For accelerating and reversing functions, speeds 0 ... 15 % of the
rated speed are permitted.
The "flying restart" function is not possible.
Only "STO" is permitted by the safety functions integrated in the drive.
≤ 40 °C
The inverter monitors the motor using a temperature model. The tem-
perature model presumes an ambient temperature of 40°C.
In the case of higher ambient temperatures, the inverter will no longer be
able to provide sufficient protection for the motor. If you operate the
motor in ambient temperatures > 40 °C, you must reduce the power of
the motor sufficiently.
Information on temperature-dependent power de-rating can be found in
the motor manual.
3.3 Motor series that are supported
Description
29