Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Product type | Soft starter |
| Rated operational current at 40 °C | 47 A |
| Operational current in inside-delta circuit at 40 °C | 81 A |
| Operating voltage | 200 … 460 V |
| Power at 400 V, 40 °C, standard circuit | 22 kW |
| Power at 400 V, 40 °C, inside-delta circuit | 45 kW |
| 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 |
| Front protection | IP20 |
Key Features
- Soft starter function: Has an integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, thermistor motor protection evaluation, external reset, and adjustable current limitation.
- Rated operational current: Rated operational current is 47 A at 40 °C, 42 A at 50 °C, and 37 A at 60 °C.
- Inside-delta circuit: Supports 81 A at 40 °C, 73 A at 50 °C, and 64 A at 60 °C for 3-phase motors in an inside-delta circuit; minimum load is 8%.
- Operating voltage and power: Operating voltage is 200 … 460 V for standard and inside-delta circuits. At 400 V and 40 °C, power is 22 kW in a standard circuit and 45 kW in an inside-delta circuit.
- Control supply and connections: Control supply is AC, with 230 V at 50 Hz and 60 Hz. The main current circuit uses a box terminal; auxiliary and control circuits use spring-loaded terminals.
- Installation and protection: Dimensions are 170 mm wide, 192 mm high, and 270 mm deep. Mounting is by screw fixing; front protection is IP20.
Frequently Asked Questions
1. What is the rated current of the Siemens 3RW4424-3BC44?
The rated operational current is 47 A at 40 °C, 42 A at 50 °C, and 37 A at 60 °C.
2. What power does the 3RW4424-3BC44 support at 400 V?
At 400 V and 40 °C, it supports 22 kW in a standard circuit and 45 kW in an inside-delta circuit.
3. What control supply does this soft starter use?
The control supply is AC at 230 V, with rated frequencies of 50 Hz and 60 Hz.
4. What terminals are provided?
The main current circuit uses a box terminal. Auxiliary and control circuits use spring-loaded terminals.
5. What should be verified before requesting a quote?
Verify the circuit type, operating voltage, motor current, ambient temperature, mounting clearances, and required conductor cross-sections.
