Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Product type | SIRIUS soft starter |
| Rated operational current at 40 °C | 162 A |
| Inside-delta operational current at 40 °C | 281 A |
| Motor power at 400 V, standard circuit, 40 °C | 90 kW |
| Motor power at 400 V, inside-delta circuit, 40 °C | 160 kW |
| Operating voltage | 200 … 460 V |
| Operating frequency | 50 … 60 Hz |
| Control supply | 230 V AC at 50 Hz or 60 Hz |
| Main current connection | Busbar connection |
| Auxiliary and control connection | Screw-type terminals |
| Protection class on front | IP00; IP20 with box terminal/cover |
Applications
- Motor soft starting: Soft starting of 3-phase AC motors using standard or inside-delta circuit operation.
Key Features
- Soft starter function: SIRIUS soft starter with integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, and adjustable current limitation.
- Rated operational current: Rated operational current is 162 A at 40 °C, 145 A at 50 °C, and 125 A at 60 °C.
- Inside-delta circuit: Inside-delta circuit supports 281 A at 40 °C, 251 A at 50 °C, and 217 A at 60 °C.
- Motor power at 400 V: At 400 V and 40 °C, motor power is 90 kW in standard circuit and 160 kW in inside-delta circuit.
- Control supply: AC control supply is 230 V at 50 Hz or 60 Hz, with -15 % to 10 % tolerance.
- Connections and mounting: Main current circuit uses busbar connection; auxiliary and control circuits use screw-type terminals. Fastening is by screw fixing, with vertical mounting surface and specified rotation and tilt.
Frequently Asked Questions
1. What is the rated current of Siemens 3RW4436-6BC44?
The rated operational current is 162 A at 40 °C, 145 A at 50 °C, and 125 A at 60 °C. In inside-delta circuit, it is 281 A at 40 °C, 251 A at 50 °C, and 217 A at 60 °C.
2. What motor power does 3RW4436-6BC44 support at 400 V?
At 400 V and 40 °C, it supports 90 kW in standard circuit and 160 kW in inside-delta circuit.
3. How is 3RW4436-6BC44 connected and mounted?
The main current circuit uses a busbar connection, while auxiliary and control circuits use screw-type terminals. Fastening is by screw fixing; the unit has a vertical mounting surface and is rotatable +/-90° and tiltable +/-22.5°.
