Product information
Overview
Key Features
- Rated operational current: 432 A at 40 °C in standard circuit; 385 A at 50 °C and 335 A at 60 °C.
- Inside-delta operational 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 power at 400 V: 250 kW at 40 °C in standard circuit and 400 kW at 40 °C in inside-delta circuit.
- Supply and control: Operating voltage: 200 … 460 V with -15 % and 10 % tolerances; control supply: 230 V AC at 50 Hz or 60 Hz.
- Protection and functions: Has integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, thermistor motor protection evaluation, external reset, and adjustable current limitation.
- Connections and mounting: Main current circuit uses busbar connection; auxiliary and control circuits use screw-type terminals. Screw fixing; width 210 mm, height 230 mm, depth 298 mm.
Technical Summary
| Product designation | Soft starter |
|---|---|
| Rated operational current at 40 °C, standard circuit | 432 A |
| Rated operational current at 40 °C, inside-delta circuit | 748 A |
| Motor power at 400 V, 40 °C, standard circuit | 250 kW |
| Motor power at 400 V, 40 °C, inside-delta circuit | 400 kW |
| Operating voltage | 200 … 460 V |
| Control supply | 230 V AC at 50 Hz or 60 Hz |
| Main current connection | Busbar connection |
| Protection class on front | IP00; IP20 with box terminal/cover |
| Mounting | Screw fixing; vertical mounting surface +/-90° rotatable and +/- 22.5° tiltable |
Frequently Asked Questions
What is the rated current of Siemens 3RW4447-6BC44?
The rated operational current is 432 A at 40 °C in standard circuit and 748 A at 40 °C in inside-delta circuit.
How is the 3RW4447-6BC44 connected and mounted?
The main current circuit uses a busbar connection, while auxiliary and control circuits use screw-type terminals. Mounting is by screw fixing.
Is Siemens 3RW4447-6BC44 still in the active product range?
It is a phased-out product and is in the final year of support. The preferred successor type is 3RW5547-6HA14.
