Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Product type | SIRIUS soft starter |
| Rated operational current at 40 °C | 693 A |
| Inside-delta current at 40 °C for 3-phase motors | 1 200 A |
| Operating voltage | 200 … 460 V |
| Control supply | 230 V AC at 50 Hz or 60 Hz |
| Power at 400 V, standard circuit, 40 °C | 400 kW |
| Power at 400 V, inside-delta circuit, 40 °C | 710 kW |
| Main circuit connection | Busbar connection |
| Auxiliary and control circuit connection | Screw-type terminals |
| Mounting | Screw fixing |
| Front protection | IP00 according to IEC 60529 |
Applications
- Soft starting of 3-phase motors: Provides soft starting for 3-phase motors in standard or inside-delta circuit.
- Motor protection and control: Provides motor overload protection, thermistor motor protection evaluation, external reset, and adjustable current limitation.
Key Features
- Soft starter function: SIRIUS soft starter with thyristors, integrated bypass contact system, external reset, adjustable current limitation, and intrinsic device protection.
- Motor protection: Has motor overload protection, evaluation of thermistor motor protection, and a motor brake output.
- Rated operational current: Rated operational current is 693 A at 40 °C, 615 A at 50 °C, and 551 A at 60 °C.
- Inside-delta circuit: Supports inside-delta circuit with 1 200 A at 40 °C, 1 065 A at 50 °C, and 954 A at 60 °C for 3-phase motors.
- Supply and connections: Operating voltage is 200 … 460 V for standard and inside-delta circuits; the control supply is 230 V AC at 50 Hz or 60 Hz, with screw-type terminals for auxiliary and control circuits.
- Installation and protection: 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 is the rated operational current of the Siemens 3RW4455-6BC44?
It has 693 A at 40 °C, 615 A at 50 °C, and 551 A at 60 °C.
2. What control supply and connections does the 3RW4455-6BC44 have?
The control supply is 230 V AC at 50 Hz or 60 Hz. The main current circuit uses a busbar connection, and the auxiliary and control circuits use screw-type terminals.
3. What mounting details should be verified before ordering?
The unit uses screw fixing, measures 510 mm x 640 mm x 290 mm, requires 100 mm upward, 5 mm side, and 75 mm downward spacing for side-by-side mounting, and has IP00 front protection according to IEC 60529.
