Product information
Overview
Key Features
- Soft starter function: Provides intrinsic device protection, motor overload protection, thermistor motor protection evaluation, external reset, adjustable current limitation, and a motor brake output.
- Rated operational current: Operational current is 93 A at 40 °C, 82 A at 50 °C, and 72 A at 60 °C.
- Inside-delta performance: For 3-phase motors in an inside-delta circuit, rated operational current is 161 A at 40 °C, 142 A at 50 °C, and 125 A at 60 °C.
- Motor power ratings: At 400 V, the rating is 45 kW in a standard circuit and 90 kW in an inside-delta circuit, both at 40 °C.
- Supply and connections: The operating voltage is 200 … 460 V, with 230 V AC control supply and spring-loaded terminals for auxiliary and control circuits.
- Mechanical installation: The unit uses screw fixing and measures 170 mm wide, 192 mm high, and 270 mm deep. Mounting requires a vertical mounting surface.
Technical Summary
| Product type | Soft starter |
|---|---|
| Rated operational current at 40 °C | 93 A |
| Inside-delta operational current at 40 °C | 161 A |
| Motor power at 400 V, standard circuit, 40 °C | 45 kW |
| Motor power at 400 V, inside-delta circuit, 40 °C | 90 kW |
| Operating voltage | 200 … 460 V |
| Control supply | 230 V AC at 50 Hz or 60 Hz |
| Protection on the front | IP20 |
Frequently Asked Questions
What is the exact product type of Siemens 3RW4427-3BC44?
It is a SIRIUS soft starter with an integrated bypass contact system and thyristors.
What are the 3RW4427-3BC44 current ratings?
The rated operational current is 93 A at 40 °C in the standard circuit and 161 A at 40 °C for 3-phase motors in an inside-delta circuit.
What motor power is supported at 400 V?
The rating is 45 kW in a standard circuit and 90 kW in an inside-delta circuit, both at 40 °C.
How is the 3RW4427-3BC44 mounted and connected?
It uses screw fixing, a vertical mounting surface, a box terminal for the main current circuit, and spring-loaded terminals for auxiliary and control circuits.
What should be included when requesting a quotation?
Provide the required quantity, destination, requested date, and project or MRO context for verification.
