REA, the latest arc protection system developed by ABB, combines a unique sensor technique with instantaneous and reliable fault detection, solid state trip outputs and an extremely fast total system operating time. These are qualities that minimize damage, allow power distribution to be smoothly restored, and may even save human lives. ABB is committed to constantly improving the safety of power distribution systems for today's highly complex society.
- Fast, adjustable three-phase, or two-phase and neutral overcurrent condition to secure tripping
- Wide area automatic or manual backlight compensation
- Loop-type or radial sensor fibre or alternatively lens type sensors for arc detection
- Two high-speed solid-state (Insulated Gate Bipolar Transistor) outputs for tripping of CBs
- One heavy-duty relay output for delayed control of an up-stream CB or as an alarm output
- Two RJ-45 type ports for chaining extension units
- Two opto-connectors for signal transfer between central units
- Continuous self-supervision of sensor fibre loop, operating voltages and cabling between central units and extension units