Product information
Overview
Key Features
- Motor starting control: SIRIUS soft starter with thyristors, adjustable current limitation, external reset, intrinsic device protection and motor overload protection.
- Electrical ratings: Rated operational current: 38 A at 40 °C; 34 A at 50 °C; 31 A at 60 °C. Standard-circuit motor rating: 18.5 kW at 400 V and 11 kW at 230 V, at 40 °C.
- Operating and control supply: Operating voltage: 200 … 480 V. Control supply: AC/DC, 24 V at 50 Hz, 60 Hz or DC, with -20 % to 20 % tolerance for the 24 V supply.
- Integrated bypass: Integrated bypass contact system is included; motor brake output and inside-delta circuit are not included.
- Installation and connections: S0 device with screw and snap-on mounting, 45 mm width, 125 mm height and 155 mm depth. Main, auxiliary and control circuits use screw-type terminals.
- Protection and environment: Front protection class: IP20. Operating ambient temperature: -25 … +60 °C; storage ambient temperature: -40 … +80 °C. Derating temperature: 40 °C.
Technical Summary
| Product designation | Soft starter |
|---|---|
| Rated operational current | 38 A at 40 °C; 34 A at 50 °C; 31 A at 60 °C |
| Standard-circuit motor rating | 18.5 kW at 400 V and 11 kW at 230 V, at 40 °C |
| Operating voltage | 200 … 480 V |
| Control supply | 24 V AC/DC at 50 Hz, 60 Hz or DC |
| Device size | S0 |
| Electrical connection | Screw-type terminals for main, auxiliary and control circuits |
| Front protection | IP20 |
Frequently Asked Questions
What is the rated operational current of Siemens 3RW4028-1BB04?
The rated operational current is 38 A at 40 °C, 34 A at 50 °C and 31 A at 60 °C.
What control supply does this soft starter use?
The control supply is AC/DC at 24 V. The AC supply is rated at 50 Hz and 60 Hz, and the DC supply is also rated at 24 V.
How is the 3RW4028-1BB04 mounted and connected?
It uses screw and snap-on mounting. The main, auxiliary and control circuits use screw-type terminals.
