Product Description
Key Features
- Soft starter ratings: 250 A at 40 °C in standard circuit operation; 433 A at 40 °C in inside-delta circuit operation.
- Motor power ratings: At 400 V: 132 kW in standard circuit and 250 kW in inside-delta circuit.
- Operating voltage: 200 … 460 V rated operating voltage for both standard circuit and inside-delta circuit, with -15 % relative negative tolerance and 10 % relative positive tolerance.
- Control supply: AC control supply with 230 V at 50 Hz and 230 V at 60 Hz; frequency tolerance is -10 % to 10 %.
- Protection and control functions: Has intrinsic device protection, motor overload protection, thermistor motor protection evaluation, external reset, adjustable current limitation, and a motor brake output.
- Installation and connections: 210 mm wide, 230 mm high, and 298 mm deep; screw fixing, busbar connection for the main current circuit, and screw-type terminals for auxiliary and control circuits.
Technical Summary
| Product designation | Soft starter |
|---|---|
| Product brand name | SIRIUS |
| Rated current at 40 °C, standard circuit | 250 A |
| Rated current at 40 °C, inside-delta circuit | 433 A |
| Rated motor power at 400 V, standard circuit | 132 kW |
| Rated motor power at 400 V, inside-delta circuit | 250 kW |
| Rated operating voltage | 200 … 460 V |
| Control supply voltage | 230 V AC at 50 Hz and 60 Hz |
| Main current circuit connection | Busbar connection |
| Auxiliary and control circuit connection | Screw-type terminals |
| Product lifecycle | Start of final year of support |
Frequently Asked Questions
What is the exact product designation?
The exact product designation is Siemens 3RW4444-6BC44, SIRIUS soft starter.
What current does the 3RW4444-6BC44 support?
It has a rated current of 250 A at 40 °C in standard circuit operation and 433 A at 40 °C in inside-delta circuit operation.
What control supply does it use?
The control supply is AC, with 230 V at 50 Hz and 230 V at 60 Hz.
What connections are provided?
The main current circuit uses a busbar connection; auxiliary and control circuits use screw-type terminals.
What lifecycle information should be confirmed?
The product has a start of final year of support; confirm the required lifecycle status for the requested configuration.
