Product information
Overview
Key Features
- Rated current: Rated operational current: 356 A at 40 °C, 315 A at 50 °C, and 280 A at 60 °C.
- 400 V motor capacity: At 400 V and 40 °C, motor capacity is 200 kW in standard circuit and 355 kW in inside-delta circuit.
- Supply and frequency: Operating voltage: 200 … 460 V AC in standard circuit and inside-delta circuit; rated operating frequency: 50 … 60 Hz.
- Protection and control functions: Has integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, thermistor motor protection evaluation, external reset, and adjustable current limitation.
- Installation and connections: Screw fixing with vertical mounting surface; main current circuit uses busbar connection, while auxiliary and control circuits use screw-type terminals.
Technical Summary
| Product type | SIRIUS soft starter |
|---|---|
| Rated operational current | 356 A at 40 °C; 315 A at 50 °C; 280 A at 60 °C |
| Inside-delta rated current | 617 A at 40 °C; 546 A at 50 °C; 485 A at 60 °C |
| 400 V standard-circuit capacity | 200 kW at 40 °C |
| 400 V inside-delta capacity | 355 kW at 40 °C |
| Operating voltage | 200 … 460 V AC, standard circuit and inside-delta circuit |
| Operating frequency | 50 … 60 Hz; negative tolerance -10 %, positive tolerance 10 % |
| Control supply | 230 V AC at 50 Hz and 60 Hz |
| Mounting | Screw fixing; vertical mounting surface, +/-90° rotatable and +/-22.5° tiltable to the front and back |
| Connections | Busbar connection for main current circuit; screw-type terminals for auxiliary and control circuit |
| Configuration status | Phased-out product; successor is SIRIUS 3RW5, preferred successor type is 3RW5546-6HA14 |
Frequently Asked Questions
What is the rated current of Siemens 3RW4446-6BC44?
The rated operational current is 356 A at 40 °C, 315 A at 50 °C, and 280 A at 60 °C. For 3-phase motors in inside-delta circuit, the rated values are 617 A at 40 °C, 546 A at 50 °C, and 485 A at 60 °C.
What motor capacity does 3RW4446-6BC44 support at 400 V?
At 400 V and 40 °C, it supports 200 kW in standard circuit and 355 kW in inside-delta circuit.
How is 3RW4446-6BC44 connected and mounted?
The main current circuit uses a busbar connection, and the auxiliary and control circuits use screw-type terminals. Mounting is by screw fixing on a vertical mounting surface.
What is the control supply for this soft starter?
The control supply is 230 V AC at 50 Hz or 60 Hz, with a negative voltage tolerance of -15 % and a positive tolerance of 10 %.
Is 3RW4446-6BC44 a current product configuration?
It is a phased-out product. The successor is SIRIUS 3RW5, with preferred successor type 3RW5546-6HA14.
