3RW4076-6BB45
The 3RW4076-6BB45 is the highest current rating in the SIRIUS 3RW40 series. With a rated current of 432A, it can handle a wide voltage range of 400 to 600V AC. The built-in bypass contact reduces heat generation during operation, making it more energy-efficient and stable for long-term operation.
Product Positioning
The 3RW4076-6BB45 is the highest current specification model in the Siemens SIRIUS 3RW40 series. It uses thyristor-regulated voltage ramping to reduce the instantaneous inrush current during motor startup, making it suitable for use with large three-phase non-reversible loads.
Core Product Advantages and Features
High current carrying capacity
With a rated current of 432A, it can correspond to a voltage range of 400 to 600V AC, meeting the starting requirements of larger power motors.
Built-in bypass connection
After startup, it automatically switches to bypass contact operation to reduce heat loss caused by continuous conduction of the thyristor.
Screw terminal design
The auxiliary and control circuits use screw terminals for connection, which makes the wiring secure and easy for regular maintenance and inspection.
Wide operating temperature range
It can operate in environments ranging from -25 degrees Celsius to 60 degrees Celsius, and is suitable for most indoor power distribution room installation conditions.
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3RW4422-1BC34
Standard wiring is 26A, delta wiring is 45A, which can drive a 15hp motor at 460V. It uses screw terminals and has an IP00 protection rating. It is the entry-level model with the lowest rated current in the Siemens SIRIUS 3RW44 series.
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3RW4076-6BB44
The 3RW4076-6BB44 has a rated current of 432A and is compatible with a voltage range of 200 to 460V AC. It comes with a 230V AC control power supply and screw terminals, features a smooth start-up process, and has a bypass operation mechanism to reduce heat loss.
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3RW4076-2BB44
The 3RW4076-2BB44 and 6BB44 have the same electrical specifications. The difference is that the auxiliary and control circuits use spring terminals instead of screws for fastening. The wires are quickly clamped and not easy to loosen, making them suitable for production line distribution panels that require frequent maintenance.