Product information
Overview
Key Features
- Rated motor current: 77 A at 40 °C rated value in standard circuit; 133 A at 40 °C rated value for 3-phase motors in inside-delta circuit.
- Motor power at 400 V: 37 kW at 400 V in standard circuit and 75 kW at 400 V in inside-delta circuit, both at 40 °C rated value.
- Operating voltage: 200 … 460 V rated value in standard circuit and inside-delta circuit, with -15 % relative negative tolerance and 10 % relative positive tolerance.
- Protection and control functions: Has intrinsic device protection, motor overload protection, evaluation of thermistor motor protection, external reset, adjustable current limitation, and a motor brake output.
- Connections and mounting: Uses box terminals for the main current circuit and spring-loaded terminals for auxiliary and control circuits. Screw fixing; vertical mounting surface is +/-90° rotatable and +/- 22.5° tiltable to the front and back.
- Mechanical and protection data: Dimensions are 170 mm width, 192 mm height, and 270 mm depth. Front protection class is IP20 according to IEC 60529.
Technical Summary
| Product type | Soft starter |
|---|---|
| Rated current at 40 °C, standard circuit | 77 A |
| Rated current at 40 °C, inside-delta circuit | 133 A |
| Rated power at 400 V, standard circuit | 37 kW |
| Rated power at 400 V, inside-delta circuit | 75 kW |
| Operating voltage | 200 … 460 V AC |
| Control supply | 230 V AC at 50 Hz and 60 Hz |
| Main current connection | Box terminal |
| Auxiliary and control connection | Spring-loaded terminals |
| Mounting | Screw fixing; vertical mounting surface +/-90° rotatable and +/- 22.5° tiltable to the front and back |
| Lifecycle | Start of final year of support |
Frequently Asked Questions
What is the rated current of Siemens 3RW4426-3BC44?
The rated current is 77 A at 40 °C in standard circuit. For 3-phase motors in inside-delta circuit, it is 133 A at 40 °C.
What motor power is supported at 400 V?
The rated power is 37 kW at 400 V in standard circuit and 75 kW at 400 V in inside-delta circuit, both at 40 °C rated value.
What connections does this soft starter have?
The main current circuit uses box terminals. Auxiliary and control circuits use spring-loaded terminals.
How is the 3RW4426-3BC44 mounted?
It uses screw fixing. With a vertical mounting surface, it is +/-90° rotatable and +/- 22.5° tiltable to the front and back.
What should be included in a quotation request?
Provide the required quantity and destination so the model-specific quotation can be prepared.
