ABB RHE XT2-XT4 Circuit Breaker

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• 1. Product Overview

  The ABB RHE XT2-XT4 is a high-performance Molded Case Circuit Breaker (MCCB) in the ABB SACE XT series, designed for low-voltage industrial and commercial distribution systems. It features a thermal-magnetic trip unit to quickly disconnect circuits during overload or short-circuit conditions, protecting both equipment and personnel. The RHE XT2-XT4 series offers multiple rated currents and breaking capacities, with modular accessory options for enhanced functionality and remote monitoring.

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  2. Technical Specifications

  Parameter	Specification
  Series	ABB RHE XT Series
  Model	XT2 / XT3 / XT4
  Poles	2P, 3P, or 4P
  Frame Rated Current	16 A ~ 400 A (depending on model)
  Rated Operational Current	Adjustable (depending on trip unit)
  Rated Voltage	≤ 690 V AC / ≤ 500 V DC
  Breaking Capacity	10 kA ~ 50 kA (model and voltage dependent)
  Protection Features	Thermal-magnetic trip (overload & short-circuit), optional undervoltage trip, auxiliary contacts
  Mechanical Life	10,000 ~ 25,000 operations
  Mounting	Fixed panel or cabinet (FF)
  Terminals	Front bolt terminals, suitable for copper/aluminum conductors
  Protection Rating	IP20
  Operating Temperature	-25 ℃ ~ +70 ℃
  Insulation Voltage	800 V
  Impulse Withstand Voltage	8 kV
  Standards	IEC/EN 60947‑2

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  3. Key Features and Benefits

  • Reliable protection: Thermal-magnetic trip unit for fast disconnection during overload and short-circuit faults.

  • High breaking capacity: Up to 50 kA in selected models for main and branch circuit protection.

  • Modular design: Supports auxiliary contacts, undervoltage trip, remote operation, and signaling modules.

  • Multiple poles and current ratings: 2P, 3P, 4P; 16 A to 400 A, flexible for various loads.

  • Industrial standard compliance: Meets IEC/EN 60947‑2 for industrial and commercial low-voltage applications.

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  4. Typical Applications

  • Main and branch circuit protection in industrial low-voltage distribution

  • Motor, pump, fan, and automation equipment protection

  • Control panels and distribution boards

  • Commercial building and infrastructure power systems

  • Industrial applications: petrochemical, metallurgy, paper, mechanical processing

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  5. Installation & Usage Notes

  1. Power matching: Ensure rated current, voltage, and breaking capacity match system requirements.

  2. Correct wiring: Connect main and auxiliary circuits according to wiring diagrams and secure terminals.

  3. Environmental conditions: Avoid high temperature, humidity, dust, and corrosive atmospheres.

  4. Regular maintenance: Inspect trip unit, mechanical operation, and terminals regularly.

  5. Accessory options: Install auxiliary contacts, undervoltage trips, or signaling modules as needed for remote monitoring and alarms.

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The structure and details of the product：

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