Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Product type | SIRIUS soft starter |
| Size | S2 |
| Rated operational current at 40 °C | 72 A |
| Motor power at 400 V, standard circuit, 40 °C | 37 kW |
| Operating voltage | 200 … 480 V |
| Operating frequency | 50 … 60 Hz |
| Control supply | 110 … 230 V AC/DC |
| Main circuit connection | Screw-type terminals |
| Mounting | Screw and snap-on mounting |
| Front protection | IP20 |
| Operating ambient temperature | -25 … +60 °C |
Applications
- Motor soft starting: Provides soft starting for motors through thyristor control and an integrated bypass contact system.
- Motor overload protection: Provides motor overload protection with adjustable motor current and external reset.
Key Features
- Soft starter with integrated bypass: SIRIUS soft starter with an integrated bypass contact system and thyristors.
- Rated current and motor power: Rated operational current is 72 A at 40 °C; standard-circuit motor power is 37 kW at 400 V.
- Motor protection functions: Has intrinsic device protection, motor overload protection, external reset, and adjustable current limitation.
- Electrical supply: Operating voltage is 200 … 480 V with a rated operating frequency of 50 … 60 Hz. Control supply is 110 … 230 V AC/DC.
- Screw terminals and mounting: Uses screw-type terminals for the main, auxiliary, and control circuits. Fastening is by screw and snap-on mounting.
- S2 mechanical design: Size S2; dimensions are 55 mm wide, 160 mm high, and 170 mm deep. Front protection is IP20.
Frequently Asked Questions
1. What is the rated current of the Siemens 3RW4038-1BB14?
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 supported at 400 V?
The standard-circuit motor power is 37 kW at 400 V and 40 °C.
3. What control supply does this soft starter use?
The control supply is 110 … 230 V AC or 110 … 230 V DC.
4. How is the 3RW4038-1BB14 connected and mounted?
It uses screw-type terminals for the main, auxiliary, and control circuits and supports screw and snap-on mounting.
