Technical Summary
| Product designation | Soft starter |
|---|---|
| Product brand name | SIRIUS |
| Size of engine control device | S2 |
| Operational current at 40 °C | 72 A |
| At 500 V power | 45 kW |
| Operating voltage at standard circuit | 400 … 600 V |
| Control supply voltage | 24 V AC/DC |
| Operating frequency | 50 … 60 Hz |
| Integrated bypass contact system | Yes |
| Thyristors | Yes |
| Fastening method | screw and snap-on mounting |
| Protection class IP on the front according to IEC 60529 | IP20 |
Key Features
Soft starter S2
SIRIUS soft starter with size of engine control device S2.
SIRIUS soft starter with size of engine control device S2.
72 A rated current
Rated current at 40 °C: 72 A.
Rated current at 40 °C: 72 A.
45 kW at 500 V
At 500 V, standard circuit rated value at 40 °C: 45 kW.
At 500 V, standard circuit rated value at 40 °C: 45 kW.
24 V AC/DC control supply
Control supply voltage 1: 24 V at AC and 24 V at DC.
Control supply voltage 1: 24 V at AC and 24 V at DC.
Screw terminals
Main current circuit and auxiliary and control circuit use screw-type terminals.
Main current circuit and auxiliary and control circuit use screw-type terminals.
Integrated bypass contact system
Integrated bypass contact system: Yes.
Integrated bypass contact system: Yes.
Applications
Motor soft starting
Soft starting for a motor in the SIRIUS 3RW soft starters range.
Soft starting for a motor in the SIRIUS 3RW soft starters range.
Motor overload protection
Motor overload protection function.
Motor overload protection function.
Current-limited starting
Adjustable current limitation for motor starting.
Adjustable current limitation for motor starting.
Frequently Asked Questions
What is Siemens 3RW4038-1BB05?
It is a SIRIUS soft starter, model 3RW4038-1BB05, in size S2.
What current and power ratings does 3RW4038-1BB05 have?
Rated current is 72 A at 40 °C, and the power rating is 45 kW at 500 V.
What control supply voltage does 3RW4038-1BB05 use?
The control supply voltage is 24 V AC/DC.
What connection type does 3RW4038-1BB05 use?
It uses screw-type terminals for the main current circuit and for the auxiliary and control circuit.
Does 3RW4038-1BB05 include an integrated bypass contact system?
Yes, the integrated bypass contact system is included.
