Product details
Siemens SIRIUS 3RW4435-6BC44 Soft Starter
High power soft starter for pumps, compressors and conveyors. Smooth motor start, less stress on cables and contactors. Easy wiring. Fast setup. Author: Powergear X Automation.
Main Highlights
- Standard mode: 134 A / 75 kW @ 400 V
- Inside-delta mode: 232 A / 132 kW @ 400 V
- Control voltage: 230 V AC
- Motor overload and heat sensor inputs (PTC)
- Adjustable current limit for gentle start
- Supports motor brake output
- Minimum motor load: 8%
- Operating temp: up to 60°C
Electrical Values
- Rated voltage: 200–460 V AC
- Frequency: 50 / 60 Hz
- Voltage tolerance: -15% / +10%
- Power loss at full load: 76 W
- Continuous current at 40°C: 115% of Ie
- UL rating: 75 hp @ 460 V (standard), 150 hp @ 460 V (inside-delta)
Size and Mounting
- Width: 170 mm
- Height: 200 mm
- Depth: 270 mm
- Max cable length: 500 m
- Install altitude: up to 5000 m
- Top clearance 100 mm / bottom 75 mm
- IP00 open type unit
Wiring & Terminals
- Main busbar terminals: 16–70 mm²
- Supports dual cable up to 2 × 70 mm²
- Aux terminals: 3 NO + 1 changeover
- Aux wire range: 0.5–2.5 mm²
Benefits
- Lower energy and peak current during start
- Less vibration and better motor life
- Fits new or retrofit cabinets
- Quick wiring with screw terminals
Warranty & Shipping
- Warranty: 12 months
- Shipping via FedEx, UPS, DHL worldwide
FAQ
- Q: How do I know if inside-delta mode is needed?
- A: Use inside-delta when you need more power output in the same panel space.
- Q: What happens if the current limit is set too low?
- A: The motor may not start. Increase the limit gradually while testing load.
- Q: Can this unit protect the motor without an external relay?
- A: Yes. It has built-in motor overload and PTC sensor evaluation.
- Q: Does the unit need a fan or cooling?
- A: Leave free space above and below to allow natural heat flow.
- Q: What is the best practice to reduce wiring heat?
- A: Use larger cable size and tighten terminals to the rated torque.
Contact Information
- Email: sales@powergearx.com
- WhatsApp: +86 18030005825
Original Source: https://www.powergearx.com/
Partner: Ubest Automation Limited
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