Key Features
- Soft starter design: SIRIUS soft starter with product designation Soft starter.
- Integrated switching elements: Integrated bypass contact system: Yes; thyristors: Yes.
- Protection and start control: Intrinsic device protection: Yes; motor overload protection: Yes; evaluation of thermistor motor protection: Yes; adjustable current limitation: Yes.
- Electrical ratings: Operational current at 40 °C rated value: 93 A; operating voltage at standard circuit rated value: 200 … 460 V; control supply voltage 1 at AC: 230 V.
Technical Summary
| Product designation | Soft starter |
|---|---|
| Integrated bypass contact system | Yes |
| Thyristors | Yes |
| Intrinsic device protection | Yes |
| Motor overload protection | Yes |
| Adjustable current limitation | Yes |
| Inside-delta circuit | Yes |
| Insulation voltage rated value | 690 V |
| Operational current at 40 °C rated value | 93 A |
| Operating voltage at standard circuit rated value | 200 … 460 V |
| Control supply voltage 1 at AC | 230 V |
| Protection class IP on the front according to IEC 60529 | IP20 |
Applications
- Motor starting with current limitation: Motor starting with adjustable current limitation and inside-delta circuit operation.
- Motor protection control: Motor overload protection and thermistor motor protection evaluation for motor protection control.
Frequently Asked Questions
What is the Siemens 3RW4427-3BC44 product type?
It is a SIRIUS soft starter.
What are the main electrical ratings of 3RW4427-3BC44?
Operational current at 40 °C rated value: 93 A. Operating voltage at standard circuit rated value: 200 … 460 V. Control supply voltage 1 at AC: 230 V.
What terminal types does 3RW4427-3BC44 use?
For the main current circuit it uses box terminal, and for the auxiliary and control circuit it uses spring-loaded terminals.
What lifecycle status is listed for 3RW4427-3BC44?
It is a phased-out product, and the successor is SIRIUS 3RW5. Preferred successor type: 3RW5527-3HA14.
