Description
3
3.1 Applications
The cycloconverter is used to continuously adjust the speed of permanent-magnet and
separately excited synchronous motors as well as for induction motors with high power ratings,
high torques and low stator frequencies. The converter is suitable for four-quadrant operation
without any additional equipment. This means driving and braking are possible in both
directions of rotation.
The output frequency is typically approx. 40% to 44% of the line frequency. The converter is
used for slow-speed applications, if these demand a high power and the highest torques. For
instance, these conditions prevail in the following applications:
● In the steel industry for main rolling mill drives
● In mining, for example for cement and ore crushers as well as conveyor belts carrying ore
3.2 Safety concept
The device and its associated components are subject to an extensive safety concept. When
used properly, the security concept guarantees safe installation, safe operation as well as safe
service and maintenance.
The safety concept encompasses safety components and functions to protect the device and
operators. The device is also equipped with monitoring functions to protect external
components.
The device operates safely when the interlock and protection systems are functioning properly.
Nevertheless, there are areas that are hazardous for personnel and that cause material
damage if the safety information of all the instructions and the labels on the device are not
strictly complied with.
3.2.1 Safety components and functions
Touch protection is ensured by means of a housing that conforms to EN 60204-11 and door
interlocking. Another door interlocking system is optionally installed, e.g. Castell Lock.
The electromechanical door interlocking system prevents access to the power unit while
operational. The following conditions must be fulfilled in order to open the doors: For additional
information, see Chapter "Opening the device (Page 78)".
SINAMICS SL150 6SL38600UL432AA0Z
Operating Instructions Rev.201910281433 EXAMPLE 25
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