Technical Summary
| Product designation | Soft starter |
|---|---|
| Product brand name | SIRIUS |
| Integrated bypass contact system | Yes |
| Motor overload protection | Yes |
| Evaluation of thermistor motor protection | Yes |
| Inside-delta circuit | Yes |
| At 400 V, 40 °C rated current | 780 A |
| At 400 V, inside-delta circuit, 40 °C rated power | 800 kW |
| Operating voltage at standard circuit | 200 … 460 V |
| Control supply voltage | 230 V AC |
| Control supply frequency | 50 Hz |
Key Features
SIRIUS soft starter
Product designation: Soft starter in the SIRIUS range.
Product designation: Soft starter in the SIRIUS range.
Integrated bypass contact system
Integrated bypass contact system: Yes.
Integrated bypass contact system: Yes.
Motor protection functions
Motor overload protection, evaluation of thermistor motor protection, and intrinsic device protection: Yes.
Motor overload protection, evaluation of thermistor motor protection, and intrinsic device protection: Yes.
Current and power ratings
780 A at 400 V, 40 °C standard and 800 kW at 400 V inside-delta circuit.
780 A at 400 V, 40 °C standard and 800 kW at 400 V inside-delta circuit.
Control and connection details
200-460 V AC operating voltage, 230 V AC control supply, screw-type terminals, and busbar connection for the main current circuit.
200-460 V AC operating voltage, 230 V AC control supply, screw-type terminals, and busbar connection for the main current circuit.
Applications
Motor starting with overload protection
Soft starting with motor overload protection and thermistor motor protection evaluation.
Soft starting with motor overload protection and thermistor motor protection evaluation.
Inside-delta motor starting
Inside-delta circuit for 3-phase motor starting.
Inside-delta circuit for 3-phase motor starting.
Frequently Asked Questions
What is Siemens 3RW4456-6BC44?
It is a SIRIUS soft starter.
What are the main current ratings of 3RW4456-6BC44?
The unit is rated at 780 A at 400 V, 40 °C standard, and 1 351 A at 400 V inside-delta circuit, 40 °C.
What control supply does 3RW4456-6BC44 use?
The control supply is 230 V AC with 50 Hz and 60 Hz frequency ratings.
What connection type is used for the main current circuit?
The main current circuit uses a busbar connection.
Is 3RW4456-6BC44 still current?
It is a phased-out product. The preferred successor type is 3RW5554-6HA14.
