Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Rated operational current at 40 °C, standard circuit | 432 A |
| Rated operational current at 40 °C, inside-delta circuit | 748 A |
| Rated motor power at 400 V, standard circuit | 250 kW |
| Rated motor power at 400 V, inside-delta circuit | 400 kW |
| 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 |
Key Features
- Rated operational current: 432 A at 40 °C, 385 A at 50 °C, and 335 A at 60 °C in standard circuit.
- Inside-delta current: 748 A at 40 °C, 667 A at 50 °C, and 580 A at 60 °C for 3-phase motors in inside-delta circuit.
- Motor protection and control: Has intrinsic device protection, motor overload protection, evaluation of thermistor motor protection, external reset, and adjustable current limitation.
- Control supply: AC control supply with 230 V at 50 Hz and 60 Hz; the supply frequency has a -10 % to 10 % tolerance.
- Electrical connections: Uses busbar connection for the main current circuit and screw-type terminals for auxiliary and control circuits.
- Mounting and protection: Screw fixing; 210 mm wide, 230 mm high, and 298 mm deep. Front protection is IP00, or IP20 with box terminal/cover.
Frequently Asked Questions
1. What rated current does the Siemens 3RW4447-6BC44 provide?
It provides 432 A at 40 °C, 385 A at 50 °C, and 335 A at 60 °C in standard circuit.
2. What control supply and connections does this soft starter use?
It uses a 230 V AC control supply at 50 Hz or 60 Hz, with busbar connection for the main current circuit and screw-type terminals for auxiliary and control circuits.
3. What mounting clearances are required for the 3RW4447-6BC44?
With side-by-side mounting, required spacing is 100 mm upwards, 5 mm at the side, and 75 mm downwards. The device uses screw fixing.
