Product information
Overview
Key Features
- Rated operational current: 880 A at 40 °C, 780 A at 50 °C and 693 A at 60 °C.
- Inside-delta performance: 1 524 A at 40 °C, 1 351 A at 50 °C and 1 200 A at 60 °C for three-phase motors in inside-delta circuit.
- Motor protection functions: Has intrinsic device protection, motor overload protection, thermistor motor protection evaluation, external reset and adjustable current limitation.
- Supply and connections: Operating voltage: 200 … 460 V AC in standard or inside-delta circuit. Control supply: 230 V AC at 50 Hz or 60 Hz; main circuit uses busbar connection and auxiliary/control circuits use screw-type terminals.
- Mounting and protection: Screw fixing, IP00 protection on the front, and vertical mounting surface with +/-90° rotation or +/-22.5° front-to-back tilt.
- Lifecycle status: Start of final year of support; the collected product information identifies 3RW5 as the successor family and 3RW5556-6HA14 as the preferred successor type.
Technical Summary
| Product type | Soft starter |
|---|---|
| Rated operational current at 40 °C | 880 A |
| Operational current in inside-delta circuit at 40 °C | 1 524 A |
| Operating voltage | 200 … 460 V AC |
| Motor power at 400 V, standard circuit, 40 °C | 500 kW |
| Motor power at 400 V, inside-delta circuit, 40 °C | 900 kW |
| Control supply | 230 V AC at 50 Hz or 60 Hz |
| Main circuit connection | Busbar connection |
| Auxiliary and control connection | Screw-type terminals |
| Mounting | Screw fixing; vertical mounting surface +/-90° rotatable and +/-22.5° tiltable |
| Front protection | IP00 according to IEC 60529 |
| Lifecycle | Start of final year of support |
Frequently Asked Questions
What is the rated operational current of Siemens 3RW4457-6BC44?
The rated operational current is 880 A at 40 °C, 780 A at 50 °C and 693 A at 60 °C.
What operating voltage does this soft starter support?
The rated operating voltage is 200 … 460 V AC in both standard circuit and inside-delta circuit.
How is the 3RW4457-6BC44 connected?
The main current circuit uses a busbar connection. Auxiliary and control circuits use screw-type terminals.
What mounting and front protection details should be verified?
It uses screw fixing, has IP00 protection on the front according to IEC 60529, and requires 100 mm upward, 5 mm side and 75 mm downward spacing for side-by-side mounting.
What should I provide for an MRO or project quotation?
Provide the required quantity, destination and requested date so the exact model and requirements can be reviewed.
