Key Features
- Soft starter designation: SIRIUS soft starter.
- Integrated bypass contact system: Integrated bypass contact system: Yes.
- Protection and control functions: Intrinsic device protection, motor overload protection, evaluation of thermistor motor protection, external reset, and adjustable current limitation.
- Electrical and circuit data: 200 … 460 V AC operating voltage, 230 V AC control supply, and inside-delta circuit support.
- Connections and mounting: Busbar connection for the main current circuit, screw-type terminals for auxiliary and control circuit, and screw fixing.
- Lifecycle status: Phased-out product with start of final year of support.
Technical Summary
| Product designation | Soft starter |
|---|---|
| Product brand name | SIRIUS |
| Integrated bypass contact system | Yes |
| Thyristors | Yes |
| Motor overload protection | Yes |
| Inside-delta circuit | Yes |
| Operational current at 40 °C | 970 A |
| Operational current for 3-phase motors at inside-delta circuit at 40 °C | 1 680 A |
| Operating voltage at standard circuit | 200 … 460 V |
| Control supply voltage 1 at AC | 230 V |
Applications
- Motor soft starting: Soft starting for motors using a SIRIUS soft starter.
- Inside-delta motor starting: Inside-delta circuit operation for motor starting.
Frequently Asked Questions
What is the exact Siemens model 3RW4458-6BC44?
It is a SIRIUS soft starter.
What is the rated operational current at 40 °C for 3RW4458-6BC44?
970 A.
What is the operating voltage range for 3RW4458-6BC44?
200 … 460 V.
What control supply voltage does 3RW4458-6BC44 use?
230 V AC control supply.
What connection type is used for the main current circuit on 3RW4458-6BC44?
Busbar connection for the main current circuit.
