3RW4444-6BC44 - Soft starters - SIEMENS
This SIEMENS soft starter bears the reference 3RW4444-6BC44. It corresponds to the SIEMENS - SIRIUS 3RW range.
SIRIUS soft starters Values for 400 V, +40°C standard: 250A, 132 kW Root of 3: 433 A, 250 kW 200-460 V AC, 230 V AC screw terminals !!! End of life product!! Successor is SIRIUS 3RW5, Preferred successor: >>3RW5544-6HA14<<
SIEMENS system reconditioned and tested on a manufacturer's test bench (100% test).
Available endings: 3RW4444-2BC34, 3RW4444-2BC35, 3RW4444-2BC36, 3RW4444-2BC44, 3RW4444-2BC45, 3RW4444-2BC45, 3RW4444-2BC46, 3RW4444-6BC34, 3RW4444-6BC35, 3RW4444-6BC36, 3RW4444-6BC44, 3RW4444-6BC45, 3RW4444-6BC46.
SIRIUS 3RW40
SIRIUS 3RW40 soft starters have all the same advantages as the 3RW30/31 soft starters including soft start and soft stop,1) and internal bypass. At the same time they come with additional functions, i.e. selectable solid-state motor overload, intrinsic device protection and adjustable current limiting, as well as a new patented two-phase control method (Polarity Balancing) that is unique in this rating range. SIRIUS 3RW40 soft starters are part of the SIRIUS modular system. This results in advantages such as identical sizes and a uniform connection system. Thanks to their particularly compact design, SIRIUS 3RW40 soft starters are only half as big as comparable wye-delta starters. Hence they can be mounted in compact space requirements in the control cabinet. Configuring and installation are carried out quickly and easily thanks to the 3-wire connection.
SIRIUS 3RW40
for three-phase motors Soft starters rated up to 300 Hp (at 460 V) for standard applications in three-phase power systems. Extremely small sizes, low power losses and simple commissioning are just three of the many advantages of the SIRIUS 3RW40 soft starters.
Area of application
The SIRIUS 3RW40 solid-state soft starters are suitable for soft starting and stopping of three-phase asynchronous motors. Using the patented two-phase control, the current is kept at minimum values in all three phases throughout the entire starting time and typical direct current components are eliminated. This not only enables the two-phase starting of motors up to 300 Hp (at 460 V) but also avoids the current and torque peaks which occur i.e. with wye-delta starters or other mechanical starters.
Application areas
• Fans
• Pumps
• Building/construction machines
• Presses • Escalators
• Transport systems
• Air conditioning systems
• Ventilators
• Assembly lines
• Compressors and coolers
• Operating mechanisms
Applicable standards
• IEC 60947-2
• UL/CSA #E143112
Siemens is an international group of German origin specializing in high technology and present in the sectors of industry, energy and health. It was founded in 1847 by Werner von Siemens.