Key Features
- Soft starter: SIRIUS soft starter for industrial-control selection.
- Integrated bypass contact system: Integrated bypass contact system: Yes.
- Motor protection functions: Motor overload protection, evaluation of thermistor motor protection, and intrinsic device protection.
- Current and circuit options: Adjustable current limitation and inside-delta circuit support.
- Connection and indication: 230 V AC spring-type terminals and display version for fault signal.
Applications
- Motor starting control: Soft-start control for a motor.
- Motor overload protection: Motor protection with overload and thermistor evaluation functions.
- Inside-delta motor circuit integration: Use in an inside-delta circuit for motor control.
Technical Summary
| Product designation | Soft starter |
|---|---|
| Product brand name | SIRIUS |
| Integrated bypass contact system | Yes |
| Thyristors | Yes |
| Motor overload protection | Yes |
| Evaluation of thermistor motor protection | Yes |
| Adjustable current limitation | Yes |
| Inside-delta circuit | Yes |
| Insulation voltage rated value | 690 V |
| Operational current at 40 °C rated value | 93 A |
| At 400 V – at standard circuit at 40 °C rated value | 45 kW |
| Operating voltage at standard circuit rated value | 200 … 460 V |
| Control supply voltage 1 at AC | 230 V |
| Protection class IP on the front according to IEC 60529 | IP20 |
Frequently Asked Questions
What is Siemens 3RW4427-3BC44?
It is a SIRIUS soft starter.
What is the rated operational current of 3RW4427-3BC44 at 40 °C?
93 A.
What is the operating voltage range of 3RW4427-3BC44?
200 … 460 V for the standard circuit and for the inside-delta circuit.
What control supply voltage does 3RW4427-3BC44 use?
230 V AC.
What front protection does 3RW4427-3BC44 have?
IP20 according to IEC 60529.
