Product Description
Key Features
- Rated current and motor power: At 400 V and 40 °C, rated current is 880 A in the standard circuit and 1 524 A in the inside-delta circuit; motor power is 500 kW in the standard circuit and 900 kW in the inside-delta circuit.
- Voltage and control supply: Rated operating voltage is 200 … 460 V in standard and inside-delta circuits. The AC control supply is 230 V at 50 Hz and 60 Hz.
- Integrated functions: The soft starter has an integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, thermistor motor protection evaluation, external reset, adjustable current limitation, and a motor brake output.
- Connections and terminals: The main current circuit uses busbar connection; auxiliary and control circuits use screw-type terminals. The device has 3 NO and 1 CO auxiliary contacts.
- Installation and dimensions: Screw fixing is used. Dimensions are 510 mm wide, 640 mm high, and 290 mm deep; mounting is on a vertical surface with the stated rotation and tilt limits.
- Lifecycle and protection: The collected lifecycle data states the start of the final year of support. Front protection class is IP00 according to IEC 60529.
Technical Summary
| Product | Siemens SIRIUS 3RW4457-6BC44 soft starter |
|---|---|
| Rated current at 400 V, 40 °C | 880 A, standard circuit; 1 524 A, inside-delta circuit |
| Motor power at 400 V, 40 °C | 500 kW, standard circuit; 900 kW, inside-delta circuit |
| Rated operating voltage | 200 … 460 V, standard and inside-delta circuits |
| Control supply | AC, 230 V at 50 Hz and 60 Hz |
| Main current connection | Busbar connection |
| Auxiliary and control connection | Screw-type terminals |
| Auxiliary contacts | 3 NO, 1 CO, 0 NC |
| Mounting | Screw fixing; vertical mounting surface +/-90° rotatable and +/- 22.5° tiltable to the front and back |
| Front protection | IP00 according to IEC 60529 |
| Product lifecycle | Start of final year of support |
Frequently Asked Questions
What should be confirmed when requesting Siemens 3RW4457-6BC44?
Confirm the exact order number 3RW4457-6BC44, required quantity, destination, requested date, and condition preference.
What rated current does the 3RW4457-6BC44 provide at 400 V and 40 °C?
It provides 880 A in the standard circuit and 1 524 A in the inside-delta circuit.
What connections does this soft starter use?
The main current circuit uses a busbar connection, while the auxiliary and control circuits use screw-type terminals.
What mounting and spacing must be checked?
The device uses screw fixing on a vertical mounting surface. Required spacing is 100 mm upwards, 5 mm at the side, and 75 mm downwards.
