Key Features
- SIRIUS soft starter: Product designation: Soft starter; product brand name: SIRIUS.
- Current and power ratings: At 40 °C standard: 432 A and 250 kW at 400 V.
- Inside-delta performance: Inside-delta circuit: 748 A at 40 °C and 400 kW at 400 V.
- Supply and control voltages: Operating voltage: 200 … 460 V; control supply voltage: 230 V AC.
- Connection and lifecycle: Main current circuit connection: busbar connection; auxiliary and control circuit connection: screw-type terminals; phased-out product with preferred successor type 3RW5547-6HA14.
Technical Summary
| Product brand name | SIRIUS |
|---|---|
| Product designation | Soft starter |
| Integrated bypass contact system | Yes |
| Thyristors | Yes |
| Motor overload protection | Yes |
| Adjustable current limitation | Yes |
| Inside-delta circuit | Yes |
| Insulation voltage rated value | 690 V |
| Operating voltage at standard circuit rated value | 200 … 460 V |
| Control supply voltage 1 at AC | 230 V |
| Operational current at 40 °C rated value | 432 A |
| At 400 V – at standard circuit at 40 °C rated value | 250 kW |
| Main current circuit connection | busbar connection |
Applications
- Inside-delta motor starting: Supports inside-delta circuit operation for 3-phase motors.
- Motor protection control: Provides motor overload protection, thermistor motor protection evaluation, and external reset handling.
Frequently Asked Questions
What is Siemens 3RW4447-6BC44?
It is a SIRIUS soft starter.
What are the main current and power ratings of 3RW4447-6BC44?
At 40 °C standard, it is rated at 432 A and 250 kW at 400 V. In inside-delta circuit, it is rated at 748 A and 400 kW at 400 V.
What voltage supply does Siemens 3RW4447-6BC44 use?
The operating voltage is 200 … 460 V, and the control supply voltage is 230 V AC.
How is 3RW4447-6BC44 connected?
The main current circuit uses a busbar connection, and the auxiliary and control circuit uses screw-type terminals.
What is the lifecycle status of 3RW4447-6BC44?
It is a phased-out product, and the preferred successor type is 3RW5547-6HA14.
