3RW4074-6BB34
The 3RW4074-6BB34 main circuit covers 200 to 460V AC, and the control power supply adopts a 115V AC design. It has the same current specification as the 6BB44 version, the difference lies in the selection of control loop voltage.
Product Positioning
The 3RW4074-6BB34 is a Siemens SIRIUS 3RW40 series model. The main circuit voltage is 200 to 460V AC, and the control power supply is changed to 115V AC, which is convenient for connecting to the low-voltage control circuit system commonly used in North America.
Core Product Advantages and Features
115V control voltage
The control circuit power supply is 115V AC, which is suitable for use with American standard transformers and control box wiring.
Adjustable current limiting settings
The lower limit of the current limit can be adjusted to approximately 130A, and the starting current can be flexibly set according to the actual needs of the motor.
280A rated current
With a rated power of 160kW at 400V, it covers the starting range of common medium-sized three-phase motors.
Thyristor bypass architecture
Built-in bypass contact reduces component heating after startup, extending the lifespan of the soft starter.
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3RW4074-6BB35
The 3RW4074-6BB35 supports high-voltage main circuits from 400 to 600V AC, with a control power supply of 115V AC and a rated current of 280A. It is commonly used in large three-phase motor starting applications in North American standard switchboards.
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3RW4074-2BB44
The 3RW4074-2BB44 and 6BB44 have the same electrical specifications, both rated at 280A. The difference lies in the auxiliary control circuit, which uses spring-clamp terminals for quick and secure wire clamping, making it suitable for production line distribution panels that require frequent maintenance.
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3RW4073-6BB45
3RW4073-6BB45 is the smallest model in this batch with a rated current of 230A, corresponding to a voltage range of 400 to 600V AC, an insulation voltage of 600V, and complies with IEC 60947-4-2 pollution level 3 standard.