Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Product type | Soft starter |
| Operational current at 40 °C | 880 A |
| Inside-delta operational current at 40 °C | 1 524 A |
| Operating voltage | 200 … 460 V |
| Power at 400 V and 40 °C | 500 kW standard circuit; 900 kW inside-delta circuit |
| Control supply | 230 V AC at 50 Hz or 60 Hz |
| Main current connection | Busbar connection |
| Auxiliary and control connection | Screw-type terminals |
| Mounting | Screw fixing |
| Front protection | IP00 according to IEC 60529 |
| Product lifecycle | Start of final year of support |
Key Features
- Soft starter function: The device has an integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, thermistor motor protection evaluation, external reset, and adjustable current limitation.
- Rated operational current: Operational current is 880 A at 40 °C, 780 A at 50 °C, and 693 A at 60 °C.
- Inside-delta circuit: Inside-delta operational current is 1 524 A at 40 °C, 1 351 A at 50 °C, and 1 200 A at 60 °C for 3-phase motors.
- Voltage and power: Operating voltage is 200 … 460 V in standard and inside-delta circuits. At 400 V and 40 °C, power is 500 kW in standard circuit and 900 kW in inside-delta circuit.
- Control supply and connections: The AC control supply is 230 V at 50 Hz or 60 Hz. The main current circuit uses busbar connection; auxiliary and control circuits use screw-type terminals.
- Mechanical installation: The device uses screw fixing, measures 510 mm x 640 mm x 290 mm, and has IP00 protection on the front according to IEC 60529.
Frequently Asked Questions
1. What type of device is Siemens 3RW4457-6BC44?
It is a SIRIUS soft starter with an integrated bypass contact system and thyristors.
2. What operational current does 3RW4457-6BC44 provide?
It provides 880 A at 40 °C, 780 A at 50 °C, or 693 A at 60 °C in standard circuit.
3. What voltage and power values apply at 400 V?
At 400 V and 40 °C, the value is 500 kW in standard circuit and 900 kW in inside-delta circuit; operating voltage is 200 … 460 V.
4. How is the soft starter connected and mounted?
The main current circuit uses busbar connection, auxiliary and control circuits use screw-type terminals, and mounting uses screw fixing.
