Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Rated operational current at 40 °C | 72 A |
| Rated motor power at 500 V | 45 kW |
| Rated operating voltage | 400 … 600 V |
| Rated operating frequency | 50 … 60 Hz |
| Control supply voltage | 24 V AC/DC |
| Size of engine control device | S2 |
| Electrical connection | Screw-type terminals for main current, auxiliary, and control circuits |
| Fastening method | Screw and snap-on mounting |
| Front protection class | IP20 |
| Operating ambient temperature | -25 … +60 °C |
Applications
- Motor soft starting: Provides soft starter function for motor starting.
- Motor overload protection: Provides motor overload protection.
Key Features
- Soft starter rating: SIRIUS S2 soft starter with 72 A rated current at 40 °C and 45 kW at 500 V in a standard circuit.
- Operating voltage and frequency: Rated operating voltage: 400 … 600 V; rated operating frequency: 50 … 60 Hz.
- Control supply: AC/DC control supply with 24 V rated control supply voltage at AC and DC.
- Protection and control functions: Has integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, external reset, and adjustable current limitation.
- Connection and mounting: Has screw-type terminals for the main current, auxiliary, and control circuits; fastening uses screw and snap-on mounting.
- Dimensions and front protection: Mechanical dimensions are 55 mm wide, 160 mm high, and 170 mm deep; front protection class is IP20.
Frequently Asked Questions
1. What is the rated current of Siemens 3RW4038-1BB05?
The rated operational current is 72 A at 40 °C, 62 A at 50 °C, and 60 A at 60 °C.
2. What motor power is specified at 500 V?
The rated motor power is 45 kW at 500 V in a standard circuit at 40 °C.
3. What control supply does this soft starter use?
The control supply is AC/DC, with a rated control supply voltage of 24 V at AC and DC.
4. How is the 3RW4038-1BB05 connected and mounted?
It has screw-type terminals for the main current, auxiliary, and control circuits, with screw and snap-on mounting.
