Adapting Inverter To The Application; General Basics - Siemens Sinamics G110M Original Instructions Manual

Examples for operating the converter and motor on a 400 V line supply
Assumption: The motor rating plate states 230/400 V Δ/Y.
Case 1: A motor is normally operated between standstill and its rated speed (i.e. a speed
corresponding to the line frequency). In this case, you need to connect the motor in Y.
Operating the motor above its rated speed is only possible in field weakening, i.e. the motor
torque available is reduced above the rated speed.
Case 2: If you want to operate the motor with the "87 Hz characteristic", you need to connect
the motor in Δ.
With the 87 Hz characteristic, the motor's power output increases. The 87 Hz characteristic
is mainly used with geared motors.
Before you connect the motor, ensure that the motor has the appropriate connection for your
application:
Motor is connected in the star or delta configuration
With SIEMENS motors, you will see a
diagram of both connection methods on
the inside of the cover of the terminal
box:
• Star connection (Y)
• Delta connection (Δ)
A.3

Adapting Inverter to the application

A.3.1

General basics

Inverters are used to improve and extend the starting and speed response of motors.
Adapting the inverter to the drive task
The inverter must match the motor that it is controlling and the drive task to be able to
optimally operate and protect the motor.
Although the inverter can be parameterized for very specific applications, many standard
applications function satisfactorily with just a few adaptations.
SINAMICS G110M Operating Instructions
Operating Instructions, 04/2015, FW V4.7.3, A5E31298649B AD
A.3 Adapting Inverter to the application
Appendix
313