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ABB 1SDA038292R1 Circuit Breaker 

1. Key Parameters

• Order Code/Part Number: 1SDA038292R1 (unique identifier for procurement and documentation)
• Product Series: ABB Tmax XT series (high-performance low-voltage circuit breakers)
• Pole Configuration: 3 poles (for three-phase AC power systems)
• Rated Current (Iₙ): 630A (continuous operating current rating)
• Rated Voltage (Uₙ):
  • AC: 415V (50/60Hz, for low-voltage distribution networks)
  • DC: Not applicable (AC-only design)
• Breaking Capacity (Iₙₜ): 50kA (at 415V AC; ability to safely interrupt short-circuit currents up to 50kA)
• Protection Functions:
  • Overload protection (thermal-magnetic tripping: inverse time-delay for overloads)
  • Short-circuit protection (electromagnetic tripping: instantaneous trip for short-circuits)
  • Optional earth fault protection (residual current detection, IΔn: 0.1A~10A)
• Tripping Unit Type: TMD (Thermal-Magnetic Device) – standard for general-purpose overload/short-circuit protection; optional Micrologic electronic trip unit for precise current setting
• Installation Type: Fixed mounting (compatible with ABB standard switchgear enclosures)
• Dimensions (W×H×D): 185mm × 270mm × 150mm (optimized for switchboard integration)
• Weight: Approximately 5.2kg
• Insulation Voltage (Ui): 690V AC
• Impulse Withstand Voltage (Uimp): 8kV
• Protection Class: IP40 (when installed in a compatible enclosure); Complies with IEC 60947-2, EN 60947-2, UL 489

2. Product Features

• High Breaking Capacity: 50kA breaking capacity at 415V AC ensures safe interruption of high short-circuit currents, protecting downstream equipment (e.g., motors, transformers) in industrial power systems.
• Dual Protection Mechanism: Thermal-magnetic (TMD) trip unit provides reliable overload protection (via bimetallic strip) and fast short-circuit protection (via electromagnet), balancing sensitivity and robustness for general-purpose applications.
• Flexible Trip Unit Options: Optional Micrologic electronic trip unit enables precise adjustment of protection parameters (overload current, short-circuit current, time delay) and supports remote monitoring—ideal for critical applications requiring customizable protection.
• Robust Construction: Heavy-duty metal housing and corrosion-resistant components (e.g., silver-plated contacts) ensure long service life (≥10,000 mechanical operations) in harsh industrial environments (dust, vibration, temperature fluctuations).
• Easy Integration: Fixed mounting design and compatibility with ABB Tmax XT series accessories (e.g., auxiliary contacts, shunt trips, undervoltage releases) simplify switchboard assembly and expand functionality (e.g., remote control, alarm signaling).
• Safety Compliance: Meets global low-voltage safety standards (IEC 60947-2, UL 489), ensuring compliance with electrical codes in commercial, industrial, and infrastructure projects worldwide.

3. Application Fields

• Industrial Power Distribution: Protects main feeders and branch circuits in manufacturing plants, steel mills, and cement facilities—safeguarding high-power equipment (e.g., motors, compressors) from overloads and short-circuits.
• Commercial Buildings: Used in low-voltage switchboards for office towers, shopping malls, and hotels—protecting HVAC systems, lighting networks, and electrical panels from current abnormalities.
• Data Centers: Safeguards critical power distribution paths for server racks, UPS systems, and cooling equipment—ensuring uninterrupted power supply and preventing downtime from electrical faults.
• Infrastructure Projects: Installed in utility substations, water treatment plants, and transportation hubs (e.g., airports, metro stations)—protecting public infrastructure electrical systems from damage.
• Renewable Energy Facilities: Protects power distribution circuits in solar farms and wind energy plants—connecting renewable energy sources to the grid while ensuring safe operation during current fluctuations.

4. Precautions

• Current Rating Matching: Ensure the rated current (630A) aligns with the circuit’s maximum expected load—overloading (e.g., connecting excessive equipment) will cause frequent tripping or contact damage.
• Trip Unit Configuration: For TMD trip units, confirm the default overload/short-circuit settings match the application; for Micrologic units, use ABB software to calibrate parameters (avoid over-adjustment, which may disable protection).
• Installation Safety: Disconnect the main power supply before installing or servicing the breaker; use torque wrenches to tighten terminal connections (per ABB specifications) to avoid loose connections and overheating.
• Accessory Compatibility: Use only ABB-approved accessories (auxiliary contacts, shunt trips) designed for the Tmax XT series—non-compatible accessories may disrupt protection functions or cause mechanical failure.
• Environmental Protection: Install the breaker in a dust-tight, moisture-proof enclosure (IP40 or higher) in industrial environments; avoid direct exposure to corrosive gases (e.g., sulfur, chlorine) or extreme temperatures (-5℃~+60℃ operating range).
• Regular Maintenance: Periodically inspect contacts for wear or burning, test the tripping mechanism (using a dedicated test tool), and clean the breaker surface—replace the unit if contacts are pitted, or the trip unit fails self-diagnostics

The structure and details of the product：

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