2025-06-19 BY
IN Company News

Product Description（产品说明）

The ABB REA101-AAA is a high-performance arc fault protection module designed to quickly detect and respond to arc failures in low and medium voltage switchgear. It provides reliable protection for operators and equipment by integrating advanced detection and tripping functions。

Technical Parameters（产品参数）

  • Overcurrent Protection: Three-phase overcurrent protection function。
  • Sensor Fiber Support: Supports ring or radial sensor fiber for arc detection。
  • High-Speed Outputs: Two high-speed semiconductor outputs (HSO1 and HSO2) for tripping。
  • Relay Output: One heavy-duty relay output (TRIP3) for circuit-breaker failure protection (CBFP) or alarm。
  • Communication Ports: Two RJ45 ports for connecting expansion units。
  • Optical Connectors: Two optical connectors for fast ON/OFF signal transmission between central units。
  • Operating Temperature: -20°C to +60°C。
  • Power Supply: 24 V DC (±10%)。
  • Electrical Isolation: 2.5 kV AC between channels and power。

Product Specifications（产品规格）

  • Dimensions: 45 mm × 100 mm × 110 mm。
  • Mounting Method: DIN rail (TS 35)。
  • Output Channels: 8 SPDT relay channels。
  • Contact Rating: 5 A @ 250 V AC / 30 V DC。
  • Switching Frequency: Up to 10 Hz (resistive load)。

Series（系列）

The REA101-AAA is part of the ABB REA100 series of industrial I/O modules。

Features（特征）

  • Fast Arc Detection: Detects arc faults between phases of the busbar system。
  • Self-Monitoring: Monitors sensor fiber, operating voltage, and cabling between central and expansion units。
  • Hot-Swappable Design: Allows module replacement without powering down the system。
  • Mechanical Durability: Relays rated for over 1 million operations。
  • Real-Time Status Indicators: LED indicators for each channel provide real-time status updates。
  • Flexible Wiring Options: Screw-down terminals accommodate wire gauges from 0.2 mm² to 2.5 mm²。

Function（作用）

The REA101-AAA provides fast and reliable protection against arc faults in electrical systems. It detects overcurrent conditions and triggers high-speed tripping outputs to quickly disconnect the power supply, preventing damage to equipment and ensuring operator safety。

Applications（用途）

  • Low and Medium Voltage Switchgear Protection: Detects and responds to arc faults。
  • Overcurrent Monitoring: Monitors three-phase or two-phase and neutral overcurrent conditions。
  • Circuit-Breaker Failure Protection: Provides delayed output for upstream circuit breakers。

Application Fields（应用领域）

  • Manufacturing: Controls pneumatic valves, conveyor belt motors, and warning lights。
  • Food and Beverage Processing: Controls sterilization chamber doors, batch process actuators, and packaging equipment。
  • Energy and Utilities: Manages low-power circuit breakers, generator start/stop signals, and HVAC dampers。
  • Water Treatment Facilities: Controls pumps, valves, and chemical dosing systems
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ABB REA101-AAA

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