Key Features
- Soft starter designation: SIRIUS soft starter, product designation: Soft starter.
- Rated current and power: 38 A at 40 °C; 22 kW at 500 V.
- Control supply and connection: 24 V AC/DC control supply with screw terminals and screw-type terminals for the main and auxiliary/control circuits.
- Integrated device functions: Integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, external reset, and adjustable current limitation.
- Mechanical format: Size of engine control device: S0; width 45 mm, height 125 mm, depth 155 mm.
- Protection and environment: IP20 on the front according to IEC 60529; operating temperature -25 … +60 °C; installation altitude up to 5 000 m.
Technical Summary
| Product brand name | SIRIUS |
|---|---|
| Product designation | Soft starter |
| Size of engine control device | S0 |
| Operational current at 40 °C rated value | 38 A |
| At 500 V operating power at standard circuit at 40 °C rated value | 22 kW |
| Operating voltage at standard circuit rated value | 400 … 600 V |
| Control supply voltage 1 at AC at 50 Hz rated value | 24 V |
| Control supply voltage 1 at AC at 60 Hz rated value | 24 V |
| Type of electrical connection for main current circuit | screw-type terminals |
| Type of electrical connection for auxiliary and control circuit | screw-type terminals |
| Protection class IP on the front according to IEC 60529 | IP20 |
Applications
- Motor starting with current limitation: Used for motor starting with adjustable current limitation.
- Motor overload protection: Used to provide motor overload protection with intrinsic device protection and external reset.
Frequently Asked Questions
What is Siemens 3RW4028-1BB05?
It is a SIRIUS soft starter.
What are the rated current and power of 3RW4028-1BB05?
The rated current is 38 A at 40 °C, and the rated power is 22 kW at 500 V.
What control supply does 3RW4028-1BB05 use?
The control supply is 24 V AC/DC.
What type of terminals does 3RW4028-1BB05 have?
It uses screw terminals for the main current circuit and screw-type terminals for the auxiliary and control circuit.
