Technical Summary
| Product brand name | SIRIUS |
|---|---|
| Product designation | Soft starter |
| Integrated bypass contact system | Yes |
| Thyristors | Yes |
| Intrinsic device protection | Yes |
| Motor overload protection | Yes |
| Evaluation of thermistor motor protection | Yes |
| Inside-delta circuit | Yes |
| Insulation voltage rated value | 690 V |
| Operational current at 40 °C rated value | 432 A |
| Operational current for 3-phase motors at inside-delta circuit at 40 °C rated value | 748 A |
| Operating voltage at standard circuit rated value | 200 … 460 V |
Applications
Use for starting a motor in an inside-delta circuit.
Use for motor overload protection during operation.
Use for evaluating thermistor motor protection.
Key Features
Product designation: Soft starter in the SIRIUS range.
Integrated bypass contact system: Yes.
Motor overload protection, evaluation of thermistor motor protection, and intrinsic device protection: Yes.
Inside-delta circuit: Yes.
230 V AC control supply and screw-type terminals for the auxiliary and control circuit.
Phased-out product with Start of final year of support.
Frequently Asked Questions
What is Siemens 3RW4447-6BC44?
It is a SIRIUS soft starter.
What are the operating voltage and control supply ratings for 3RW4447-6BC44?
Operating voltage at standard circuit: 200 … 460 V. Control supply voltage: 230 V AC.
What are the current ratings for 3RW4447-6BC44 at 40 °C?
At 40 °C, the rated value is 432 A for operational current and 748 A for 3-phase motors at inside-delta circuit.
What connection type does 3RW4447-6BC44 use for the control circuit?
The auxiliary and control circuit uses screw-type terminals.
What lifecycle status is listed for 3RW4447-6BC44?
It is a phased-out product with Start of final year of support.
