3RW4056-6BB44
The Siemens 3RW4056-6BB44 soft starter uses thyristor phase control to provide smooth voltage ramp start and stop, reduce motor starting surge current, and has built-in bypass contacts and overload protection functions. It is widely used in industrial equipment such as pumps, fans, and conveyors.
Product Positioning
The 3RW4056-6BB44 is one of the soft starters in the Siemens SIRIUS 3RW40 series. It controls the start and stop of the motor in a voltage ramp manner, reducing the impact on the power grid and mechanical structure at the moment of start-up.
Core Product Advantages and Features
Thyristor voltage ramp control
By adjusting the phase angle of the power supply voltage, the three-phase motor can be smoothly accelerated from a standstill to its rated speed.
Bypass contact cooling design
When operating at full speed, the built-in bypass contact provides power, reducing the temperature rise caused by the continuous conduction of the thyristor.
Built-in overload protection
It features motor thermal overload protection, which helps monitor motor operation and reduce the risk of abnormalities.
Adjustable start-up settings
The start-up ramp time and current limit value can be flexibly set according to the characteristics of the motor and load.
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