Key Features
- SIRIUS soft starter: Product designation: Soft starter.
- Integrated bypass contact system: Integrated bypass contact system: Yes.
- Motor protection functions: Motor overload protection, evaluation of thermistor motor protection, and intrinsic device protection: Yes.
- Inside-delta circuit: Inside-delta circuit: Yes.
- Control and connection details: Control supply voltage: AC 230 V; type of electrical connection for auxiliary and control circuit: screw-type terminals.
- Lifecycle status: Phased-out product; start of final year of support.
Applications
- Soft starting of a motor supply circuit: Soft starter for reducing motor starting stress in a standard or inside-delta circuit.
- Motor overload protection and thermistor motor protection evaluation: Protection function for motor overload protection and evaluation of thermistor motor protection.
Technical Summary
| Product designation | Soft starter |
|---|---|
| Integrated bypass contact system | Yes |
| Thyristors | Yes |
| Motor overload protection | Yes |
| Evaluation of thermistor motor protection | Yes |
| Inside-delta circuit | Yes |
| Adjustable current limitation | Yes |
| Insulation voltage rated value | 690 V |
| Operational current at 40 °C | 250 A |
| Operational current for 3-phase motors at inside-delta circuit at 40 °C | 433 A |
| Operating voltage at standard circuit rated value | 200 … 460 V |
| Control supply voltage 1 at AC | 230 V |
| Display version for fault signal | Display |
Frequently Asked Questions
What is the Siemens 3RW4444-6BC44 product type?
It is a SIRIUS soft starter.
What is the rated operational current of 3RW4444-6BC44 at 40 °C?
The operational current at 40 °C is 250 A.
What control supply voltage does 3RW4444-6BC44 use?
The control supply voltage is AC 230 V.
Which connection type is used for the auxiliary and control circuit?
The auxiliary and control circuit uses screw-type terminals.
What is the operating voltage range for the standard circuit?
The operating voltage at standard circuit is 200 … 460 V.
