Key Features
- Soft starter: SIRIUS soft starter with thyristors and integrated bypass contact system.
- Motor protection functions: Motor overload protection, evaluation of thermistor motor protection, intrinsic device protection, and external reset.
- Current and power data: 47 A at 40 °C standard circuit, 81 A at 40 °C inside-delta circuit, 22 kW at 400 V, and 45 kW at 400 V inside-delta circuit.
- Control and connection: 230 V AC control supply, spring-loaded terminals for auxiliary and control circuit, and box terminal for main current circuit.
- Mounting and enclosure: Screw fixing, vertical mounting surface with +/-90° rotatable and +/- 22.5° tiltable mounting position, and IP20 front protection.
Applications
- Motor starting with reduced current in a standard circuit: Soft starting for a motor in a standard circuit with adjustable current limitation.
- Inside-delta motor starting: Inside-delta circuit starting for a 3-phase motor.
- Motor protection and reset functions: Motor overload protection, thermistor motor protection evaluation, intrinsic device protection, and external reset.
Technical Summary
| Product designation | Soft starter |
|---|---|
| Product brand name | SIRIUS |
| Integrated bypass contact system | Yes |
| Thyristors | 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 | 47 A |
| Operational current for 3-phase motors at inside-delta circuit at 40 °C rated value | 81 A |
| Operating voltage at standard circuit rated value | 200 … 460 V |
Frequently Asked Questions
What is Siemens 3RW4424-3BC44?
It is a SIRIUS soft starter.
What are the current ratings for 3RW4424-3BC44?
The rated value is 47 A at 40 °C in the standard circuit and 81 A at 40 °C in the inside-delta circuit.
What supply and control voltage does 3RW4424-3BC44 use?
The operating voltage is 200 … 460 V, and the control supply voltage is 230 V AC.
What connections and mounting details are listed for 3RW4424-3BC44?
It uses spring-loaded terminals for the auxiliary and control circuit, a box terminal for the main current circuit, screw fixing, and a vertical mounting surface with +/-90° rotatable and +/- 22.5° tiltable mounting position.
