Monitoring And Protection Functions; Safety Shutdown Of The Converter; Speed Monitoring With Incremental Encoder - Siemens SINAMICS GL150 Operating Instructions Manual
Medium-voltage drive
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- Operating instructions & installation instructions (150 pages) ,
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Operation
8.4 Monitoring and protection functions
● The shortest possible settling times during disturbances are required.
● Prolonged operation at speeds of less than 10% is necessary.
● A high starting torque for approach is required if, for example, 5% of the speed is not
8.4
Monitoring and protection functions
8.4.1
Safety shutdown of the converter
Tripping of the circuit-breaker in case of undervoltage
In the event of a serious fault, the converter is rapidly switched into a de-energized state by the
safety shutdown function.
The circuit-breaker must be equipped with an undervoltage trip to ensure the wire-break
protection for the circuit-breaker OFF command.
If a circuit-breaker OFF command is issued as a result of an overvoltage trip, the circuit-breaker
is switched off so that it is fail safe.
Danger due to high voltages after a safety shutdown
In spite of a safety shutdown function, the drive may still be operational or high voltages may
still be present.
Residual voltages can result in death, severe injury or significant material damage. The
"Safety shutdown" function can neither ensure that the drive stops immediately nor can it
ensure that residual voltages do not still exist at the output terminals and within the unit.
● Make sure that the drive no longer rotates and that there are no high voltages present.
8.4.2
Speed monitoring with incremental encoder
Permanent speed monitoring enables motor control without an encoder. If higher-performance
applications require permanent speed monitoring, additional incremental encoders can be
connected to options A51 - A54. Higher-performance applications include, for example, closed-
loop position control or prolonged applications involving low speeds.
112
achieved in 10 s.
WARNING
SINAMICS GL150 6SL38555UN113KA0Z
Operating Instructions Rev.201910281450 EXAMPLE
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