Product Overview
Technical Summary
| Product designation | SIRIUS soft starter |
|---|---|
| Rated operational current at 40 °C, standard circuit | 93 A |
| Rated operational current at 40 °C, inside-delta circuit | 161 A |
| Motor power at 400 V, standard circuit | 45 kW |
| Motor power at 400 V, inside-delta circuit | 90 kW |
| Operating voltage | 200 … 460 V |
| Control supply | 230 V AC at 50 Hz and 60 Hz |
| Main current connection | Box terminal |
| Auxiliary and control connection | Spring-loaded terminals |
| Mounting | Screw fixing |
| Front protection | IP20 |
Key Features
- Product designation: SIRIUS soft starter with integrated bypass contact system and thyristors.
- Rated operational current: 93 A at 40 °C in standard circuit; 161 A at 40 °C for 3-phase motors in inside-delta circuit.
- Motor power at 400 V: 45 kW at 40 °C in standard circuit; 90 kW at 40 °C in inside-delta circuit.
- Supply and connections: 200 … 460 V operating voltage; 230 V AC control supply at 50 Hz and 60 Hz; spring-loaded terminals for auxiliary and control circuit.
- Protection and functions: Intrinsic device protection, motor overload protection, evaluation of thermistor motor protection, external reset, adjustable current limitation, and motor brake output.
- Mechanical installation: 170 mm width, 192 mm height, 270 mm depth; screw fixing; IP20 protection class on the front.
Frequently Asked Questions
What product does Siemens 3RW4427-3BC44 identify?
It identifies a SIRIUS soft starter with integrated bypass contact system and thyristors.
Which current values distinguish this configuration?
The rated operational current is 93 A at 40 °C in standard circuit and 161 A at 40 °C in inside-delta circuit.
What supply and connection details should be checked?
Check the 200 … 460 V operating voltage, 230 V AC control supply at 50 Hz and 60 Hz, box terminal for the main current circuit, and spring-loaded terminals for auxiliary and control circuits.
What is the lifecycle status of this product?
It is a phased-out product at the start of the final year of support. The preferred successor type is 3RW5527-3HA14.
