Extension unit REA 103

The REA 103 is an extension unit designed to be used together with the arc protection relay REA 101. The function of the unit is to detect light and to provide the REA 101 relay with information about this. The use of the extension unit allows the protection area to be extended and the object to be divided into smaller areas.

• 2 sensor fibres for arc detection, loop or radial arrangement.
• 2 signal relays for each sensor fibre.
• Relays activated by light detected by the sensor fibre.
• 2 RJ-45 ports for the connection of REA 101 relay and extension units.
• Self-supervision unit monitoring operating voltages and sensor fibre loops