Basler Electric BE-51 G1EZ1PB1E0F Time-Overcurrent Protective Relay

The Basler Electric BE-51 G1EZ1PB1E0F Time-Overcurrent Protective Relay is a microprocessor-based protective relay that provides time overcurrent protection (51) for 50 Hz or 60 Hz systems. It supports single-phase, two-phase-with-neutral, three-phase, and three-phase-with-neutral input configurations, enabling flexible installation with generators, transformers, feeders, and motors. The pickup is adjustable over a wide range, and protection timing can be selected from 16 field-selectable time-current curves to match the application. Basler notes a low sensing burden on CT circuits and a low-burden power supply, helping reduce installation costs and wiring complexity. The relay also features a simple HMI for straightforward configuration without requiring a computer, and Basler offers voltage-control and voltage-restraint model variants within the BE1 family for extended coordination options.