Product Overview
Technical Summary
| Product designation | SIRIUS soft starter |
|---|---|
| Size | S0 |
| Rated operational current at 40 °C | 38 A |
| Motor rating at 500 V | 22 kW |
| Operating voltage | 400 … 600 V |
| Control supply | 110 … 230 V AC/DC |
| Operating frequency | 50 … 60 Hz |
| Main current circuit connection | Screw-type terminals |
| Mounting | Screw and snap-on mounting |
| Front protection | IP20 according to IEC 60529 |
| Operating ambient temperature | -25 … +60 °C |
| Product lifecycle | Active Product |
Key Features
- Product designation: SIRIUS soft starter, S0 size.
- Rated operational current: 38 A at 40 °C; 34 A at 50 °C and 31 A at 60 °C.
- Motor rating: 18.5 kW at 400 V and 22 kW at 500 V in the standard circuit at 40 °C.
- Supply and connections: 400 … 600 V operating voltage; 110 … 230 V AC/DC control supply; screw-type terminals for main, auxiliary, and control circuits.
- Protection and functions: Integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, external reset, and adjustable current limitation.
- Mounting and protection: Screw and snap-on mounting, 45 mm width, 125 mm height, 155 mm depth, and IP20 protection on the front according to IEC 60529.
Frequently Asked Questions
What product does Siemens order number 3RW4028-1BB15 identify?
It identifies a SIRIUS soft starter in size S0 with a rated operational current of 38 A at 40 °C.
Which specifications distinguish this MLFB variant?
The supplied variant has a 22 kW rating at 500 V, 400 … 600 V operating voltage, 110 … 230 V AC/DC control supply, and screw-type terminals.
What connection details should be checked against the nameplate?
Check the complete order number 3RW4028-1BB15, the S0 size, the 38 A rating at 40 °C, the screw-type terminals, and the 110 … 230 V AC/DC control supply.
What information is needed for a quotation?
Provide the complete order number, required quantity, and destination.
