Siemens SIRIUS 3RW44 22-1BC44: Compact Soft Starter with Advanced Control

Core Product Specifications

• 3RW44 22-1BC44 delivers reliable motor starting performance
• Siemens SIRIUS series ensures industrial-grade durability and precision
• Standard circuit operation: 29A at 40°C for 15kW motors at 400V
• Inside-delta configuration: 50A at 40°C for 22kW motors at 400V
• Wide operating voltage range from 200V to 460V AC
• Control supply voltage: 230V AC at both 50Hz and 60Hz frequencies
• Integrated bypass contact system reduces energy consumption

Performance & Power Ratings

• Standard Circuit Power: 15kW at 400V, 5.5kW at 230V
• Inside-Delta Power: 22kW at 400V, 15kW at 230V
• Horsepower Ratings: 7.5hp to 30hp depending on configuration
• Current Derating: 29A at 40°C, 26A at 50°C, 23A at 60°C
• Minimum Load: 8% of motor current for precise control
• Power Loss: Only 8W typical during normal operation
• Frequency Tolerance: ±10% for stable performance

Protection & Safety Systems

• Motor overload protection prevents equipment damage
• Intrinsic device protection ensures operational reliability
• Thermistor motor protection evaluation for temperature monitoring
• Adjustable current limitation from 5A minimum setting
• External reset capability for maintenance convenience
• Visual fault signaling with clear status display
• 115% continuous operating current capacity at 40°C

Installation & Mechanical Data

• Compact dimensions: 170mm width × 192mm height × 270mm depth
• Screw fixing mounting with flexible rotation options
• Clearance requirements: 100mm above, 5mm sides, 75mm below
• Maximum wire length: 500 meters for flexible installation
• Installation altitude: Up to 5000 meters above sea level
• Three-pole main current circuit design
• IP00 protection class requires proper enclosure

Electrical Connections

• Main circuit: Box terminal connections for power wiring
• Auxiliary circuits: Screw-type terminals for control signals
• Contact configuration: 3 NO contacts, 1 changeover contact
• Front clamping: 2.5-70mm² conductors depending on type
• Rear clamping: 2.5-70mm² conductors for flexible wiring
• Dual clamping: 2×(2.5-50mm²) for parallel connections
• AWG compatibility: 10 to 2/0 for international standards

Environmental Specifications

• Operating temperature: Up to 60°C ambient conditions
• Storage temperature: -25°C to +80°C range
• Derating begins at 40°C ambient temperature
• Environmental category: IEC 60721 3K6, 3C3, 3S2, 3M6
• Suitable for industrial environments without ice formation
• Protection against salt mist and sand contamination

Shipping & Packaging

• Professional packaging ensures complete product protection
• Express delivery via FedEx, UPS, and DHL available
• Global shipping to most international destinations
• Quick order processing and same-day dispatch
• Complete packaging includes all necessary components

Warranty & Support

• 12-month comprehensive warranty coverage
• Technical support available for installation guidance
• Replacement service for defective units
• Expert assistance for application-specific queries

Frequently Asked Questions

• What motor sizes work with this soft starter?
• The unit handles motors from 5.5kW to 22kW depending on configuration and voltage
• How does inside-delta connection benefit my application?
• Inside-delta wiring allows controlling larger motors up to 22kW with the same unit
• What protection features prevent motor damage?
• Multiple protections include overload, thermistor monitoring, and current limitation
• Can I use this starter in high-temperature environments?
• Yes, it operates up to 60°C with proper derating above 40°C ambient temperature
• What wiring options are available for installation?
• You can use front, rear, or both clamping points for 2.5-70mm² conductors

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