Product Overview
Technical Summary
| Product designation | SIRIUS soft starter |
|---|---|
| Standard-circuit operational current at 40 °C | 57 A |
| Inside-delta operational current at 40 °C | 99 A |
| Motor power at 400 V, standard circuit, 40 °C | 30 kW |
| Motor power at 400 V, inside-delta circuit, 40 °C | 55 kW |
| Operating voltage | 200 … 460 V |
| Operating frequency | 50 … 60 Hz |
| Control supply | AC, 230 V at 50 Hz or 60 Hz |
| Main current connection | Box terminal |
| Auxiliary and control connection | Spring-loaded terminals |
| Front protection | IP20 |
Key Features
- Product designation: SIRIUS soft starter with integrated bypass contact system and thyristors.
- Rated operational current: 57 A at 40 °C in standard circuit; 99 A at 40 °C for 3-phase motors in inside-delta circuit.
- Motor power at 400 V: 30 kW at 40 °C in standard circuit; 55 kW at 40 °C in inside-delta circuit.
- Control supply: AC, 230 V at 50 Hz or 60 Hz, with Display version for fault signal.
- Connections and mounting: Box terminal for the main current circuit, spring-loaded terminals for auxiliary and control circuits, and screw fixing.
- Protection and functions: Intrinsic device protection, motor overload protection, evaluation of thermistor motor protection, external reset, and adjustable current limitation.
Frequently Asked Questions
What product does Siemens 3RW4425-3BC44 identify?
It identifies a SIRIUS soft starter with an integrated bypass contact system, thyristors, motor overload protection, and external reset.
Which specifications distinguish this MLFB?
The distinguishing values include 57 A at 40 °C in standard circuit, 99 A at 40 °C in inside-delta circuit, 30 kW at 400 V in standard circuit, and 55 kW at 400 V in inside-delta circuit.
What connections and mounting details should be checked?
Check the box terminal for the main current circuit, spring-loaded terminals for auxiliary and control circuits, screw fixing, and the 170 mm x 192 mm x 270 mm dimensions.
What details are needed for a quotation?
Provide the complete code 3RW4425-3BC44, the required quantity, and the destination.
