Product Overview
Technical Summary
| Product designation | SIRIUS soft starter |
|---|---|
| Operational current at 40 °C | 432 A rated value |
| Operational current in inside-delta circuit at 40 °C | 748 A rated value |
| Power at 400 V, standard circuit | 250 kW at 40 °C rated value |
| Power at 400 V, inside-delta circuit | 400 kW at 40 °C rated value |
| Operating voltage | 200 … 460 V rated value |
| Operating frequency | 50 … 60 Hz rated value |
| Control supply | 230 V AC at 50 Hz and 60 Hz rated value |
| Mounting | Screw fixing; vertical mounting surface, +/-90° rotatable and +/-22.5° tiltable |
| Main-current connection | Busbar connection |
| Lifecycle | Start of final year of support; successor is SIRIUS 3RW5, preferred successor type 3RW5547-6HA14 |
Key Features
- Product designation: SIRIUS soft starter with integrated bypass contact system and thyristors.
- Standard-circuit rating: 432 A at 40 °C rated value; 250 kW at 400 V and 40 °C rated value.
- Inside-delta rating: 748 A at 40 °C rated value; 400 kW at 400 V and 40 °C rated value.
- Control supply: AC control supply, 230 V at 50 Hz and 60 Hz rated value.
- Protection and functions: Intrinsic device protection, motor overload protection, thermistor motor protection evaluation, external reset, adjustable current limitation, and motor brake output.
- Connections and mounting: Busbar connection for the main current circuit, screw-type terminals for auxiliary and control circuits, and screw fixing.
Frequently Asked Questions
What product does Siemens order number 3RW4447-6BC44 identify?
It identifies a SIRIUS soft starter.
Which ratings distinguish the 3RW4447-6BC44 variant?
The rated operational current is 432 A at 40 °C in standard circuit operation and 748 A at 40 °C in inside-delta circuit operation. At 400 V and 40 °C, the rated power is 250 kW in standard circuit operation and 400 kW in inside-delta circuit operation.
What control supply should be checked for this code?
The control supply is AC, 230 V at both 50 Hz and 60 Hz rated value.
How is the soft starter connected and mounted?
The main current circuit uses a busbar connection, auxiliary and control circuits use screw-type terminals, and mounting uses screw fixing.
What details are needed for a quotation?
Provide the complete order number 3RW4447-6BC44, required quantity, and destination.
