3RW4073-6BB35
The 3RW4073-6BB35 belongs to the SIRIUS series of soft starters. It uses thyristor phase control for voltage ramp-up and shutdown, which helps reduce the current surge during motor startup. It has built-in bypass contacts and thermal overload protection, and is suitable for common three-phase induction motor starting control applications in factories.
Product Positioning
The 3RW4073-6BB35 is one of the Siemens SIRIUS 3RW40 series soft starters. It achieves smooth motor starting through thyristor phase control, reducing the impact on the power supply system and transmission mechanism. This model shares the same core starter control architecture as other versions in the same series.
Core Product Advantages and Features
Thyristor phase control
By adjusting the phase angle of the power supply voltage using thyristors, a smooth voltage ramp change can be achieved when the motor starts and stops.
Bypass contact design
When operating at full speed, power is supplied through the built-in bypass contact, reducing the temperature rise caused by prolonged thyristor conduction.
Thermal overload protection function
It has a motor thermal overload protection mechanism and monitors the motor's operating status to reduce the risk of abnormalities.
Flexible start settings
The startup ramp time and current limit value can be adjusted according to the actual load to adapt to different startup scenarios.
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