Key Features
- Soft starter: SIRIUS soft starter for motor starting and control.
- Integrated bypass contact system: Integrated bypass contact system: Yes.
- Motor protection functions: Motor overload protection, evaluation of thermistor motor protection, and intrinsic device protection.
- Current control: Adjustable current limitation and inside-delta circuit.
- Control and connection: 230 V AC control supply and screw-type terminals for the auxiliary and control circuit.
- Lifecycle status: Phased-out product with Start of final year of support and preferred successor type 3RW5556-6HA14.
Applications
- Motor starting with reduced current: Soft starter function for controlled motor starting with adjustable current limitation.
Technical Summary
| 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 |
| Adjustable current limitation | Yes |
| Inside-delta circuit | Yes |
| Insulation voltage rated value | 690 V |
| Operational current at 40 °C rated value | 970 A |
| Operating voltage at standard circuit rated value | 200 … 460 V |
| Control supply voltage 1 at AC | 230 V |
Frequently Asked Questions
What is Siemens 3RW4458-6BC44?
It is a SIRIUS soft starter.
What is the control supply voltage for 3RW4458-6BC44?
The control supply voltage is 230 V AC.
What are the main current ratings for 3RW4458-6BC44?
At 400 V, 40 °C, the standard rating is 970 A and the inside-delta rating is 1680 A.
What connection type does 3RW4458-6BC44 use for the control circuit?
It uses screw-type terminals for the auxiliary and control circuit.
