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Description
3.1
Applications
The water-cooled cycloconverters for tube mill drives are used for slow speed drives with a high
power rating and the highest torques. For instance, these conditions prevail in the cement and
ore industry.
The cycloconverters are based on water-cooled thyristor stack technology. The converter is
suitable for four-quadrant operation without any additional equipment. This means that driving
and braking are possible in both directions of rotation.
The main components are:
● SINAMICS closed-loop control with CU and SIMOTION module
● Power module in degree of protection IP00
● Additional components
3.2
Safety concept
Insufficient grounding
High voltages can still be present even after shutdown. If live parts are touched, this can result
in death or severe injury.
A grounding switch is not installed. The system operator must, therefore, ensure that there is
sufficient grounding.
Ensure sufficient grounding during work on the power unit. Further information on grounding
can be found under "Safety information for maintenance and repairs".
SINAMICS SL150 6SL38655UM427AA02
Operating Instructions Rev.201910281507 EXAMPLE
Depending on the circuit, the power module consists of three (12-pulse) or six (2x6-pulse)
open, water-cooled modules in a fuseless arrangement. Each group of three modules is
assembled as a "stack".
Every converter is assigned a package with additional components. The additional
components comprise AVT combi, voltage sensing, current sensing and overvoltage
limiting. The additional components are required to assemble a complete device.
Note
Auxiliary plant equipment
All auxiliary equipment necessary for operation, control and monitoring of the converter
must be specified and incorporated by the system integrator. The equipment is not included
in the scope of delivery.
DANGER
3
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