product description：
Basic information: REA101-AAAG ABB arc protection relay
Arc protection relays REA101 and its expansion units REA103 and REA105 are designed for protection of low and medium voltage switchgear. The central unit type REA101 works alone or with the expansion units REA103 and REA105. These expansion units can increase the number of sensor fibers, thereby expanding the area to be protected.
In the case of an arc, the fault location can be quickly located by detecting the area covered by the optical fiber of the sensor that detects the arc. The expansion units REA103 and REA105 are almost identical in design. The main difference between the units is that the REA105 offers two fast trip outputs that are capable of opening, for example, two circuit breakers for a bus coupler or duplex feeder. This enables selective tripping. The arc protection relay REA101 has two output ports, each of which can be connected to up to 5 expansion units.
peculiarity
• Three-phase overcurrent function
• Ring or radial sensor fiber for arc detection
•2 High speed semiconductor output tripping
• Tripping relay output
•2 RJ45 ports for connecting expansion units
•2 optical connectors Fast on/off signal transmission between central units
• Circuit breaker fault protection, that is, high level circuit breaker delayed output
Self-monitoring unit for monitoring sensor fiber, operating voltage and cable between central unit and expansion unit
National and local electrical safety regulations must be followed at all times.
• Dangerous voltages may occur on the connector even if the auxiliary voltage is disconnected.
• The frame of the device must be carefully grounded.
• Only qualified electricians should perform electrical installation.
• The sensor fibers must be treated according to the instructions given by the sensor fiber manufacturer.
• Setup and configuration changes must be made with the auxiliary power supply voltage (Uaux) disconnected. Failure may occur if the connected power supply voltage is changed.
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