Key Features
- Soft starter: SIRIUS soft starter for controlled motor starting.
- Integrated bypass contact system: Integrated bypass contact system with thyristors.
- Motor protection functions: Supports motor overload protection, thermistor motor protection evaluation, and intrinsic device protection.
- Electrical ratings: 313 A at 40 °C standard circuit and 542 A at 40 °C inside-delta circuit; 160 kW at 400 V standard circuit and 315 kW at 400 V inside-delta circuit.
- Connections: Busbar connection for the main current circuit and screw-type terminals for the auxiliary and control circuit.
Technical Summary
| Product designation | Soft starter |
|---|---|
| Integrated bypass contact system | Yes |
| Thyristors | Yes |
| Motor overload protection | Yes |
| Evaluation of thermistor motor protection | Yes |
| Adjustable current limitation | Yes |
| Insulation voltage rated value | 690 V |
| Operational current at 40 °C | 313 A |
| Operational current for 3-phase motors at inside-delta circuit at 40 °C | 542 A |
| Operating voltage at standard circuit rated value | 200 … 460 V |
| Control supply voltage | 230 V |
Applications
- Motor starting control: Soft starting for a motor with controlled current limitation.
- Inside-delta circuit integration: Connection in an inside-delta circuit for motor control.
- Motor protection functions: Motor overload protection and thermistor motor protection evaluation.
Frequently Asked Questions
What is Siemens 3RW4445-6BC44?
It is a SIRIUS soft starter.
What are the main current ratings of 3RW4445-6BC44?
The rated value is 313 A at 40 °C in standard circuit and 542 A at 40 °C in inside-delta circuit.
What voltage range does 3RW4445-6BC44 use?
The operating voltage at standard circuit and inside-delta circuit is 200 … 460 V.
What control supply voltage does 3RW4445-6BC44 require?
The control supply voltage is 230 V AC.
What connection type does 3RW4445-6BC44 use for wiring?
It uses a busbar connection for the main current circuit and screw-type terminals for the auxiliary and control circuit.
