Product information
Overview
Key Features
- Rated current and motor power: Rated operational current: 38 A at 40 °C. Standard-circuit motor power: 18.5 kW at 400 V and 11 kW at 230 V.
- Operating voltage and control supply: Rated operating voltage: 200 … 480 V. Control supply: AC/DC, 110 … 230 V at AC or DC.
- Protection and control functions: Has intrinsic device protection, motor overload protection, external reset, and adjustable current limitation. Thermistor motor protection evaluation: No.
- Integrated bypass and thyristors: Has an integrated bypass contact system and thyristors.
- Connections and mounting: Main, auxiliary, and control circuits use screw-type terminals. Mounting: screw and snap-on mounting. Size: S0; width 45 mm, height 125 mm, depth 155 mm.
- Front protection and operating temperature: Front protection class: IP20 according to IEC 60529. Ambient temperature during operation: -25 … +60 °C; derating temperature: 40 °C.
Technical Summary
| Product | Siemens SIRIUS soft starter 3RW4028-1BB14 |
|---|---|
| Rated operational current at 40 °C | 38 A |
| Standard-circuit motor power at 400 V | 18.5 kW |
| Standard-circuit motor power at 230 V | 11 kW |
| Rated operating voltage | 200 … 480 V |
| Control supply | AC/DC, 110 … 230 V |
| Operating frequency | 50 … 60 Hz |
| Mounting | Screw and snap-on mounting |
| Connections | Screw-type terminals for main, auxiliary, and control circuits |
| Front protection | IP20 according to IEC 60529 |
| Operating ambient temperature | -25 … +60 °C |
Frequently Asked Questions
What is the rated current of the Siemens 3RW4028-1BB14?
The rated operational current is 38 A at 40 °C; it is 34 A at 50 °C and 31 A at 60 °C.
What motor power is supported at 400 V?
The standard-circuit motor power is 18.5 kW at 400 V and 40 °C rated value.
What control supply does this soft starter use?
The control supply is AC/DC, with 110 … 230 V at AC and 110 … 230 V at DC.
How is the 3RW4028-1BB14 mounted and connected?
It uses screw and snap-on mounting. The main, auxiliary, and control circuits use screw-type terminals.
