Key Features
- Soft starter: SIRIUS soft starter for industrial-control selection.
- Integrated bypass contact system: Yes.
- Thyristors: Yes.
- Motor protection functions: Intrinsic device protection, motor overload protection, and evaluation of thermistor motor protection.
- Control and connection details: 230 V AC control supply, busbar connection for the main current circuit, and screw-type terminals for the auxiliary and control circuit.
- Lifecycle note: Start of final year of support. Preferred successor type: 3RW5556-6HA14.
Applications
- Soft starting of 3-phase motors: Soft starter function for 3-phase motor control in standard or inside-delta circuit operation.
- Motor protection and reset handling: Motor overload protection, thermistor motor protection evaluation, intrinsic device protection, and external reset support.
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 |
| Operational current at 40 °C | 880 A |
| Operational current for 3-phase motors at inside-delta circuit at 40 °C | 1 524 A |
| Operating voltage at standard circuit | 200 … 460 V |
| Control supply voltage 1 at AC | 230 V |
| Control supply voltage type | AC |
| Control supply frequency | 50 Hz / 60 Hz |
Frequently Asked Questions
What is Siemens 3RW4457-6BC44?
It is a SIRIUS soft starter.
What is the rated current of 3RW4457-6BC44 at 40 °C?
880 A.
What control supply voltage does 3RW4457-6BC44 use?
230 V AC.
Which connection types are used on 3RW4457-6BC44?
Busbar connection for the main current circuit and screw-type terminals for the auxiliary and control circuit.
What are the main dimensions of 3RW4457-6BC44?
Width 510 mm, height 640 mm, depth 290 mm.
