Star Connection Of The Motor Or 87 Hz Delta Connection - Siemens SINAMICS G220 Operating Instructions Manual

Application planning
4.12 Star connection of the motor or 87 Hz delta connection
4.12 Star connection of the motor or 87 Hz delta connection
Overview
In the case of a 400‑V power supply, the motor can be operated on the converter in either a star
or a delta connection.
In a star connection, the motor is operated with its rated values.
In a delta connection, the motor is operated with a voltage and frequency above its rated
values.
Description of function
Star connection
Figure 4-4
In a star connection, the motor can be loaded with its rated torque M
frequency f
The rated voltage U
The motor goes into field weakening above the rated frequency. In field weakening, the
available motor torque decreases proportionally with 1/f. In field weakening, the available
power remains constant.
Delta connection
Figure 4-5
76
Motor in star connection
.
N
= 400 V is available at the rated frequency f
N
Motor in delta connection with 87 Hz characteristic
= 50 Hz.
N
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
in the range 0 ... rated
N
SINAMICS G220 converter