Key Features
- Soft starter designation: SIRIUS soft starter.
- Integrated motor control functions: Integrated bypass contact system, thyristors, adjustable current limitation, inside-delta circuit, motor overload protection, evaluation of thermistor motor protection, external reset, and product component motor brake output.
- Electrical ratings: 57 A at 40 °C standard circuit and 99 A at 40 °C inside-delta circuit. 30 kW at 400 V standard circuit and 55 kW at 400 V inside-delta circuit.
- Supply and control data: Operating voltage: 200 … 460 V. Control supply voltage: 230 V AC. Control supply frequency: 50 Hz and 60 Hz.
- Connections and enclosure: Box terminal for the main current circuit and spring-loaded terminals for the auxiliary and control circuit. Front protection: IP20.
- Lifecycle status: Phased-out product. Preferred successor type: >>3RW5525-3HA14<<
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 | 57 A |
| Operational current for 3-phase motors at inside-delta circuit at 40 °C | 99 A |
| Operating voltage at standard circuit rated value | 200 … 460 V |
| Control supply voltage 1 at AC at 50 Hz rated value | 230 V |
| Control supply voltage 1 at AC at 60 Hz rated value | 230 V |
| Fastening method | screw fixing |
| Type of electrical connection for main current circuit | box terminal |
| Type of electrical connection for auxiliary and control circuit | spring-loaded terminals |
| Protection class IP on the front according to IEC 60529 | IP20 |
| Product lifecycle | Start of final year of support |
Applications
- Motor starting and protection: Soft starting and overload protection for a motor control circuit.
- Inside-delta motor connection: Inside-delta circuit operation for a 3-phase motor.
Frequently Asked Questions
What is the exact Siemens model and product type of 3RW4425-3BC44?
3RW4425-3BC44 is a Siemens SIRIUS soft starter.
What are the main electrical ratings of Siemens 3RW4425-3BC44?
It is rated at 57 A at 40 °C in standard circuit and 99 A at 40 °C in inside-delta circuit.
What supply and control voltage does 3RW4425-3BC44 use?
Operating voltage is 200 … 460 V. Control supply voltage is 230 V AC at 50 Hz and 60 Hz.
Which connection types does 3RW4425-3BC44 have?
The main current circuit uses a box terminal, and the auxiliary and control circuit uses spring-loaded terminals.
What lifecycle status is listed for 3RW4425-3BC44?
It is marked as a phased-out product, and the preferred successor type is >>3RW5525-3HA14<<.
