Key Features
- Soft starter with integrated bypass: SIRIUS soft starter with integrated bypass contact system and thyristors.
- Motor protection functions: Intrinsic device protection, motor overload protection, and evaluation of thermistor motor protection.
- Inside-delta circuit support: Inside-delta circuit function with adjustable current limitation and product component motor brake output.
- Selection and connection details: 200 … 460 V operating voltage, 230 V AC control supply, spring-loaded terminals for auxiliary and control circuit, and box terminal for the main current circuit.
- Fault indication: Display version for fault signal.
Applications
- Motor starting control: Soft starting and stopping of a motor load.
- Inside-delta motor integration: Motor starting in an inside-delta circuit.
- Motor protection: Motor overload protection and thermistor motor protection evaluation for a motor load.
Technical Summary
| Product designation | Soft starter |
|---|---|
| Product brand name | SIRIUS |
| Integrated bypass contact system | Yes |
| Thyristors | Yes |
| Intrinsic device protection | Yes |
| Motor overload protection | Yes |
| Evaluation of thermistor motor protection | Yes |
| Inside-delta circuit | Yes |
| Adjustable current limitation | Yes |
| Insulation voltage rated value | 690 V |
| Operational current at 40 °C rated value | 36 A |
| Operational current for 3-phase motors at inside-delta circuit at 40 °C rated value | 62 A |
| Operating voltage at standard circuit rated value | 200 … 460 V |
| Operating voltage at inside-delta circuit rated value | 200 … 460 V |
| Control supply voltage 1 at AC | 230 V |
| Display version for fault signal | Display |
| Fastening method | screw fixing |
| Mounting position | with vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back |
| 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 |
| Touch protection on the front according to IEC 60529 | finger-safe, for vertical contact from the front |
Frequently Asked Questions
What is Siemens 3RW4423-3BC44?
It is a SIRIUS soft starter.
What are the main electrical ratings of 3RW4423-3BC44?
At 40 °C, the rated current is 36 A, and the rated power is 18.5 kW at 400 V in the standard circuit.
What control supply does 3RW4423-3BC44 use?
The control supply is AC 230 V.
Which terminal types are used on 3RW4423-3BC44?
The main current circuit uses a box terminal, and the auxiliary and control circuit uses spring-loaded terminals.
What is the enclosure protection of 3RW4423-3BC44 on the front?
The front protection class is IP20.
