Key Features
- Soft starter designation: SIRIUS soft starter.
- Integrated protection and control functions: Intrinsic device protection, motor overload protection, evaluation of thermistor motor protection, external reset, and adjustable current limitation.
- Integrated bypass and switching element: Integrated bypass contact system with thyristors.
- Inside-delta circuit support: Inside-delta circuit operation is supported.
- Motor brake output: Product component motor brake output.
- Selection and lifecycle note: Phased-out product. Successor is SIRIUS 3RW5, preferred successor type 3RW5553-6HA14.
Applications
- 3-phase motor soft starting: Soft starting for 3-phase motor circuits in standard or inside-delta operation.
- Motor overload protection: Protection of motors through integrated motor overload protection and thermistor motor protection evaluation.
- Inside-delta motor integration: Connection of a motor in an inside-delta circuit.
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 |
| Motor brake output | Yes |
| Operational current at 40 °C | 693 A |
| Operational current for 3-phase motors at inside-delta circuit at 40 °C | 1 200 A |
| Operating voltage at standard circuit rated value | 200 … 460 V |
Frequently Asked Questions
What is Siemens 3RW4455-6BC44?
It is a SIRIUS soft starter.
What is the rated operational current of 3RW4455-6BC44 at 40 °C?
The rated operational current at 40 °C is 693 A.
What voltage range does 3RW4455-6BC44 support?
The operating voltage at standard circuit rated value is 200 … 460 V, and the operating voltage at inside-delta circuit rated value is also 200 … 460 V.
What are the control supply requirements for 3RW4455-6BC44?
The control supply voltage is AC 230 V at 50 Hz and 60 Hz.
