Key Features
- Soft starter: SIRIUS soft starter for motor starting applications.
- Integrated bypass contact system: Integrated bypass contact system: Yes.
- 230 V AC control supply: Control supply voltage 1 at AC: 230 V at 50 Hz and 230 V at 60 Hz.
- Screw-type terminals: Screw-type terminals for auxiliary and control circuit.
- Inside-delta circuit: Inside-delta circuit: Yes.
Technical Summary
| Product designation | Soft starter |
|---|---|
| Integrated bypass contact system | Yes |
| Thyristors | Yes |
| Adjustable current limitation | Yes |
| Inside-delta circuit | Yes |
| Insulation voltage rated value | 690 V |
| Operational current at 40 °C rated value | 880 A |
| Operational current for 3-phase motors at inside-delta circuit at 40 °C rated value | 1 524 A |
| Operating voltage at standard circuit rated value | 200 … 460 V |
| Control supply voltage 1 at AC | 230 V |
Applications
- Motor starting with current limitation: Adjustable current limitation for controlled motor starting.
- Inside-delta motor starting: Inside-delta circuit for 3-phase motor operation.
- Motor protection and reset handling: Motor overload protection, thermistor motor protection evaluation, intrinsic device protection, and external reset support.
Frequently Asked Questions
What is Siemens 3RW4457-6BC44?
It is a SIRIUS soft starter.
What are the main current ratings for 3RW4457-6BC44?
At 400 V and 40 °C, the standard value is 880 A and 500 kW. The inside-delta value is 1524 A and 900 kW.
What control supply voltage does 3RW4457-6BC44 use?
The control supply voltage is AC, with 230 V at 50 Hz and 230 V at 60 Hz.
What connections and mounting details are listed for 3RW4457-6BC44?
The main current circuit uses busbar connection, and the auxiliary and control circuit uses screw-type terminals. The fastening method is screw fixing.
