3VL IEC molded case circuit breakers
System Manual, 11/2013, 110 0110 - 02 DS 03
57
Use with frequency converters
Combination of frequency converter and 3VL molded case circuit breaker
3VL molded case circuit breakers can be used as protection devices on the primary side in
systems in which frequency converters, variable-speed drives, and electronic motor control
devices are used. The thermal-magnetic and electronic trip units of the 3VL molded case
circuit breakers can be used in these applications. On account of RMS measurement, the
SENTRON VL trip units are not influenced by harmonics.
Figure 5-1 Frequency converters
Note
Alternative circuit breakers
SIRIUS
3RV circuit breakers can also be used for applications up to approximately 45 kW .
SIRIUS soft starters and 3VL molded case circuit breakers
For more detailed information, please refer to the soft starter catalogs and the selection
guides.
Visit our site on the Internet at:
Soft starter (http://www.siemens.de/sanftstarter
)
Frequency converters / variable-speed drives and 3VL molded case circuit breakers
Please refer to the relevant catalogs for information on the new SINAMICS series,
MICROMASTER 4, and SIMOVERT MASTERDRIVES.
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