Technical Summary
| Product designation | Soft starter |
|---|---|
| Product brand name | SIRIUS |
| Integrated bypass contact system | Yes |
| Thyristors | 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 at 50 Hz rated value | 230 V |
| Protection class IP on the front according to IEC 60529 | IP00 |
Key Features
Soft starter designation
SIRIUS soft starter for model-specific identification and ordering.
SIRIUS soft starter for model-specific identification and ordering.
Integrated functions
Integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, evaluation of thermistor motor protection, external reset, adjustable current limitation, inside-delta circuit, and motor brake output.
Integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, evaluation of thermistor motor protection, external reset, adjustable current limitation, inside-delta circuit, and motor brake output.
Current ratings
880 A at 40 °C in standard circuit and 1524 A at 40 °C for 3-phase motors in inside-delta circuit.
880 A at 40 °C in standard circuit and 1524 A at 40 °C for 3-phase motors in inside-delta circuit.
Voltage range
Operating voltage at standard circuit and inside-delta circuit: 200 … 460 V.
Operating voltage at standard circuit and inside-delta circuit: 200 … 460 V.
Connection and control
Main current circuit with busbar connection and auxiliary and control circuit with screw-type terminals.
Main current circuit with busbar connection and auxiliary and control circuit with screw-type terminals.
Lifecycle status
Phased-out product with successor type 3RW5556-6HA14.
Phased-out product with successor type 3RW5556-6HA14.
Applications
Soft starting of motors
Used for soft starting of motors with inside-delta circuit support.
Used for soft starting of motors with inside-delta circuit support.
Frequently Asked Questions
What is Siemens 3RW4457-6BC44?
It is a SIRIUS soft starter.
What is the current rating of 3RW4457-6BC44 at 40 °C?
The rated operational current is 880 A.
What is the control supply voltage for 3RW4457-6BC44?
The control supply voltage is 230 V AC at 50 Hz and 60 Hz.
What are the connection types on 3RW4457-6BC44?
The main current circuit uses busbar connection, and the auxiliary and control circuit uses screw-type terminals.
