Key Features
- Soft starter with integrated bypass: SIRIUS soft starter with integrated bypass contact system and thyristors.
- Motor protection functions: Includes intrinsic device protection, motor overload protection, evaluation of thermistor motor protection, and external reset.
- Inside-delta circuit capability: Supports inside-delta circuit operation with adjustable current limitation and product component motor brake output.
- Selection and lifecycle details: Values at 400 V, 40 °C standard: 29 A, 15 kW; inside-delta: 50 A, 22 kW. Start of final year of support; successor is SIRIUS 3RW5.
Applications
- Motor starting with reduced inrush current: Soft starting for motors using adjustable current limitation.
- Inside-delta motor integration: Operation in an inside-delta circuit for 3-phase motors.
Technical Summary
| Product designation | Soft starter |
|---|---|
| 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 | 29 A |
| Operational current for 3-phase motors at inside-delta circuit at 40 °C | 50 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 3RW4422-3BC44?
It is a SIRIUS soft starter.
What operating voltage range does 3RW4422-3BC44 support?
Operating voltage at standard circuit rated value: 200 … 460 V.
What are the current and power values for this soft starter at 400 V?
At 400 V, 40 °C standard: 29 A, 15 kW. Inside-delta: 50 A, 22 kW.
What control supply voltage does 3RW4422-3BC44 use?
Control supply voltage 1 at AC: 230 V.
What are the enclosure dimensions of 3RW4422-3BC44?
Width 170 mm, height 192 mm, depth 270 mm.
