Product Overview
Technical Summary
| Product designation | SIRIUS soft starter |
|---|---|
| Integrated bypass contact system | Yes |
| Rated operational current at 40 °C, standard circuit | 29 A |
| Rated operational current at 40 °C, inside-delta circuit | 50 A |
| Rated motor power at 400 V, standard circuit | 15 kW |
| Rated motor power at 400 °C, inside-delta circuit | 22 kW |
| Operating voltage | 200 … 460 V |
| Control supply voltage | 230 V AC at 50 Hz and 60 Hz |
| Main current connection | Box terminal |
| Front protection class | IP20 |
Key Features
- Product designation: SIRIUS soft starter with integrated bypass contact system and thyristors.
- Rated operational current: 29 A at 40 °C in standard circuit; 50 A at 40 °C for 3-phase motors in inside-delta circuit.
- Motor power at 400 V: 15 kW at 40 °C in standard circuit; 22 kW at 40 °C in inside-delta circuit.
- Control supply: AC control supply with 230 V rated value at 50 Hz and 60 Hz.
- Connections and mounting: Box terminals for the main current circuit, spring-loaded terminals for auxiliary and control circuits, and screw fixing.
- Product status: Phased-out product; product lifecycle is at the start of the final year of support.
Frequently Asked Questions
What product does Siemens 3RW4422-3BC44 identify?
It identifies a SIRIUS soft starter with an integrated bypass contact system and thyristors.
Which current ratings distinguish this configuration?
The rated operational current is 29 A at 40 °C in standard circuit and 50 A at 40 °C for 3-phase motors in inside-delta circuit.
What motor power is specified at 400 V?
The specified motor power is 15 kW at 40 °C in standard circuit and 22 kW at 40 °C in inside-delta circuit.
What connections and mounting method does it have?
It has box terminals for the main current circuit, spring-loaded terminals for auxiliary and control circuits, and screw fixing.
