Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Rated operational current at 40 °C | 38 A |
| Standard-circuit motor rating at 500 V and 40 °C | 22 kW |
| Standard-circuit operating voltage | 400 … 600 V |
| Rated operating frequency at 500 V | 50 … 60 Hz |
| Control supply | 24 V AC/DC |
| Continuous operating current at 40 °C | 115 % of Ie |
| Power loss at 40 °C during operation, typical | 19 W |
| Connection type | Screw-type terminals |
| Mounting | Screw and snap-on mounting |
| Front protection | IP20 according to IEC 60529 |
Applications
- Controlled motor starting: The soft starter provides controlled starting for motors through its adjustable current limitation and integrated bypass contact system.
- Motor overload protection: The device provides motor overload protection during operation.
Key Features
- Soft starter ratings: Rated operational current: 38 A at 40 °C. Standard-circuit motor rating: 22 kW at 500 V and 18.5 kW at 400 V.
- Operating voltage and frequency: Standard-circuit operating voltage: 400 … 600 V. Rated operating frequency: 50 … 60 Hz at 500 V.
- Control supply: Control supply voltage: 24 V AC at 50 Hz or 60 Hz, and 24 V DC. The control supply voltage tolerance is -20 % to 20 %.
- Motor protection and control: The soft starter has motor overload protection, intrinsic device protection, external reset, and adjustable current limitation.
- Integrated components and contacts: It has an integrated bypass contact system and thyristors. Auxiliary contacts include 2 NO contacts, 1 CO contact, and 0 NC contacts.
- Connection and installation: Main, auxiliary, and control circuits use screw-type terminals. The device has screw and snap-on mounting, is 45 mm wide, 125 mm high, and 155 mm deep, with IP20 front protection.
Frequently Asked Questions
1. What is the rated current of the Siemens 3RW4028-1BB05?
Its rated operational current is 38 A at 40 °C.
2. What motor rating does the soft starter have at 500 V?
It has a standard-circuit motor rating of 22 kW at 500 V and 40 °C.
3. What control supply does this soft starter use?
The control supply is 24 V AC at 50 Hz or 60 Hz, or 24 V DC.
4. What terminals and mounting method does it have?
The main, auxiliary, and control circuits use screw-type terminals. Mounting is by screw and snap-on mounting.
