Technical Summary
| Product brand name | SIRIUS |
|---|---|
| Product designation | Soft starter |
| Integrated bypass contact system | Yes |
| Thyristors | Yes |
| Motor overload protection | Yes |
| Inside-delta circuit | Yes |
| Operational current at 40 °C | 93 A |
| Operational current for 3-phase motors at inside-delta circuit at 40 °C | 161 A |
| Operating voltage at standard circuit | 200 … 460 V |
| Control supply voltage 1 at AC | 230 V |
| Protection class IP on the front according to IEC 60529 | IP20 |
Applications
Soft-start control for a motor connection with adjustable current limitation and integrated bypass contact system.
Inside-delta circuit use for three-phase motor starting and operation.
Motor overload protection, thermistor motor protection evaluation, intrinsic device protection, and external reset handling.
Key Features
Product designation: Soft starter in the Siemens SIRIUS family.
Integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, evaluation of thermistor motor protection, external reset, and adjustable current limitation.
Supports inside-delta circuit operation with 161 A at 40 °C and 90 kW at 400 V.
230 V AC control supply, spring-loaded terminals for auxiliary and control circuit, and box terminal for main current circuit.
Start of final year of support.
Width 170 mm, height 192 mm, depth 270 mm, screw fixing, and net weight 6,359 Kg.
Frequently Asked Questions
What is Siemens 3RW4427-3BC44?
It is a SIRIUS soft starter.
What supply voltage does 3RW4427-3BC44 use?
The operating voltage at standard circuit is 200 … 460 V, and the control supply voltage is 230 V AC.
Does 3RW4427-3BC44 support inside-delta operation?
Yes. It supports inside-delta circuit operation.
What are the main current and enclosure details for 3RW4427-3BC44?
The operational current at 40 °C is 93 A, the width is 170 mm, and the front protection class according to IEC 60529 is IP20.
What lifecycle status is listed for 3RW4427-3BC44?
It is in the start of final year of support.
