Key Features
- Soft starter designation: SIRIUS soft starter
- Motor protection functions: Intrinsic device protection, motor overload protection, evaluation of thermistor motor protection, and external reset
- Starting and circuit features: Integrated bypass contact system, thyristors, adjustable current limitation, and inside-delta circuit
- Electrical ratings: Values at 400 V, 40 °C standard: 356 A, 200 kW; inside-delta: 617 A, 355 kW
- Control and connections: 200 … 460 V AC operating voltage, 230 V AC control supply, screw terminals
- Lifecycle status: Phased-out product; preferred successor type is 3RW5546-6HA14
Applications
- Motor starting and soft starting: Soft starter for starting a motor with adjustable current limitation and inside-delta circuit.
- Motor protection control: Provides intrinsic device protection, motor overload protection, and evaluation of thermistor motor protection.
- Main circuit and control wiring: Uses busbar connection for the main current circuit and screw-type terminals for the auxiliary and control circuit.
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 |
| Operational current at 40 °C | 356 A |
| Operational current for 3-phase motors at inside-delta circuit at 40 °C | 617 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 3RW4446-6BC44?
It is a SIRIUS soft starter.
What are the main electrical ratings of 3RW4446-6BC44?
At 400 V and 40 °C standard, it is rated 356 A and 200 kW. In inside-delta, it is rated 617 A and 355 kW.
What control supply voltage does 3RW4446-6BC44 use?
The control supply voltage is 230 V AC.
Which connection types are used on 3RW4446-6BC44?
The main current circuit uses busbar connection, and the auxiliary and control circuit uses screw-type terminals.
What is the lifecycle status of 3RW4446-6BC44?
It is a phased-out product, and the preferred successor type is 3RW5546-6HA14.
