Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Product type | SIRIUS soft starter |
| Rated operational current at 40 °C | 313 A |
| Operational current in inside-delta circuit at 40 °C | 542 A |
| Operating voltage | 200 … 460 V AC |
| Motor power at 400 V, 40 °C, standard circuit | 160 kW |
| Motor power at 400 V, 40 °C, inside-delta circuit | 315 kW |
| Control supply | 230 V AC at 50 Hz and 60 Hz |
| Main current connection | Busbar connection |
| Auxiliary and control connection | Screw-type terminals |
| Mounting | Screw fixing |
| Front protection | IP00; IP20 with box terminal/cover |
Applications
- Motor overload protection: The device provides motor overload protection and evaluates thermistor motor protection.
- Motor braking: The device includes a motor brake output.
Key Features
- Soft starter function: SIRIUS soft starter with integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, and adjustable current limitation.
- Rated operational current: Operational current is 313 A at 40 °C, 280 A at 50 °C, and 250 A at 60 °C.
- Inside-delta circuit: Inside-delta circuit supports 542 A at 40 °C, 485 A at 50 °C, and 433 A at 60 °C.
- Voltage and motor power: Operating voltage is 200 … 460 V for standard and inside-delta circuits; at 400 V and 40 °C, motor power is 160 kW in standard circuit and 315 kW in inside-delta circuit.
- Control supply and connections: The AC control supply is 230 V at 50 Hz and 60 Hz. Main current uses a busbar connection; auxiliary and control circuits use screw-type terminals.
- Mounting and protection: Dimensions are 210 mm wide, 230 mm high, and 298 mm deep. Fastening is by screw fixing; front protection is IP00, or IP20 with box terminal/cover.
Frequently Asked Questions
1. What is the rated operational current of Siemens 3RW4445-6BC44?
The rated operational current is 313 A at 40 °C, 280 A at 50 °C, and 250 A at 60 °C.
2. What operating voltage does 3RW4445-6BC44 support?
The operating voltage is 200 … 460 V for both the standard circuit and the inside-delta circuit, with relative tolerances of -15 % and 10 %.
3. What connections does this soft starter use?
The main current circuit uses a busbar connection. Auxiliary and control circuits use screw-type terminals.
4. How is Siemens 3RW4445-6BC44 mounted?
It uses screw fixing. With a vertical mounting surface, it is rotatable by +/-90° and tiltable to the front and back by +/-22.5°.
5. Is Siemens 3RW4445-6BC44 a current product?
It is a phased-out product. The successor is SIRIUS 3RW5, with preferred successor type 3RW5545-6HA14.
