Siemens SIMOTICS M-1PH8 Configuration Manual

Using the star connection
The star connection o󹪜ers some advantages at low speeds. The maximum torque in the star
connection is approximately twice as high as in the delta connection. However, due to the higher
reactive power requirement of the star connection, the available torque in the uppermost speed
range is signi󹪝cantly restricted. This means that the star connection should only be activated
when machining which requires a high torque in the lower speed range. An example of such
a machining operation is roughing.
Using the delta connection
Although the delta connection provides, in the lower speed range, a lower maximum torque
than the star connection, the torque remains available up to high speeds. This means that the
delta connection should be activated for all machining operations which are carried out in
the medium and high speed ranges.
Electrical connection
9.3System integration
1PH8 SIMOTICS M main motors
Con󹪝guration Manual, 12/2022, A5E51895839A 241

Siemens SIMOTICS M-1PH8 Specifications

General

Brand	Siemens
Model	SIMOTICS M-1PH8
Category	Engine
Language	English