Siemens SIMOTICS S-1FT7 User Manual

Configuration
5.2 Procedure when engineering
S-1FT7 synchronous motors
Configuration Manual, 09/2018, A5E45099423B AA
113
Duty cycles with varying ON duration
Standardized intermittent duties (S3) are specified for duty cycles with varying ON durations
Each intermittent duty (S3) is made up of a sequence of duty cycles of the same type. Each
duty cycle encompasses a time with constant load and a pause.
Figure 5-4 S3 duty (intermittent operation without influencing starting)
Fixed variables are generally used for the relative ON duration:
● S3 – 60%
● S3 – 40%
● S3 – 25%
The corresponding motor characteristics are provided for these specifications.
The load torque must lie below the corresponding thermal limiting characteristic curve of the
motor. An overload is taken into account for duty cycles with varying ON duration.

Siemens SIMOTICS S-1FT7 Specifications

General

Brand	Siemens
Model	SIMOTICS S-1FT7
Category	Engine
Language	English