Product Overview
Technical Summary
| Product designation | Soft starter |
|---|---|
| Rated current at 40 °C, standard circuit | 77 A |
| Rated power at 400 V, standard circuit | 37 kW |
| Rated current at 40 °C, inside-delta circuit | 133 A |
| Rated power at 400 V, inside-delta circuit | 75 kW |
| Operating voltage, standard and inside-delta circuits | 200 … 460 V |
| Control supply | AC, 230 V at 50 Hz and 60 Hz |
| Main current circuit connection | Box terminal |
| Auxiliary and control circuit connection | Spring-loaded terminals |
| Mounting | Screw fixing |
| Front protection class | IP20 |
Key Features
- Product designation: SIRIUS soft starter with integrated bypass contact system and thyristors.
- 400 V ratings: At 40 °C, rated current is 77 A and rated power is 37 kW in standard circuit; inside-delta circuit values are 133 A and 75 kW.
- Protection and control functions: Has intrinsic device protection, motor overload protection, thermistor motor protection evaluation, external reset, and adjustable current limitation.
- Supply and connections: Control supply is AC, 230 V at 50 Hz and 60 Hz; main current circuit uses box terminals and auxiliary and control circuits use spring-loaded terminals.
- Mechanical installation: Dimensions are 170 mm wide, 192 mm high, and 270 mm deep; fastening is by screw fixing.
- Product lifecycle: Product lifecycle is at the start of the final year of support; the collected data identifies SIRIUS 3RW5 as the successor family and 3RW5526-3HA14 as the preferred successor type.
Frequently Asked Questions
What product does Siemens order number 3RW4426-3BC44 identify?
It identifies a SIRIUS soft starter.
Which ratings distinguish 3RW4426-3BC44 at 400 V?
At 40 °C, the standard circuit rating is 77 A and 37 kW. The inside-delta circuit rating is 133 A and 75 kW.
What code and nameplate details should be checked?
Check the complete order number 3RW4426-3BC44, the 200 … 460 V operating voltage, the 230 V AC control supply, and the standard or inside-delta circuit configuration.
What installation details are supplied for this soft starter?
The dimensions are 170 mm x 192 mm x 270 mm, fastening is by screw fixing, and the front protection class is IP20.
What quantity and destination are needed for a quotation?
Provide the required quantity and destination together with the complete order number 3RW4426-3BC44.
