The REA 105 module detects light and carries out tripping if the main REA 101 module simultaneously provides an overcurrent signal. REA 105 modules are typically used for main-tie-main configured switchgears or as selective arc monitoring and tripping units for the cable termination zones.
Scope
- Zone selective extension unit for the main REA101 module with direct CB tripping capability
Product benefits
- Extends the arc flash detection area by one fiber sensor in loop or radial arrangement
- Enables zone-selective tripping schemes for busbar sections or feeders
- Serves as overcurrent-status-transmitting link between two REA 101 main modules
Product features
- Supports one loop or radial-type fiber sensor, or one lens-type sensor for arc light detection
- Two high-speed IGBT outputs for direct and selective CB tripping in less than 1 ms
- Carries out tripping also whenever the connected REA 101 module(s) trip
- Circuit breaker failure protection with delayed light signal to the main REA 101 module