Compact starter saves cabinet space
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Siemens Automation and Drives product story
Edited by the Engineeringtalk editorial team
May 15, 2008
Soft starter improves startup characteristics of motors with two-phase polarity balancing, and avoids mechanical loads, voltage fluctuations and current peaks.
Siemens Automation and Drives has expanded its Sirius soft starter range with the compact 3Rw30.
Available in four different frame sizes, Sirius 3Rw30 soft starters are suitable for applications such as pumps, conveyors belts, or fans up to 55kW at 400V.
The Sirius 3RW30 soft starter improves the startup characteristics of motors with two-phase polarity balancing, and avoids mechanical loads, voltage fluctuations and current peaks.
This protects not only the drive system but also the power network and thus minimises maintenance of overhead and expensive current peaks.
The user can easily set the startup time and the starting voltage using two potentiometers on the device.
In the 45mm frame size, the 3RW30 takes the place of a star-delta switch and saves up to 70% of control cabinet space while delivering the same performance power.
The device can be easily configured and installed using three motor leads and variable connections.
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