The Basler Electric BE1‑GPS is a dedicated microprocessor‑based protection relay that provides comprehensive protection for synchronous generators. It combines multiple protection elements in a single unit, reducing panel space and wiring while ensuring high reliability and coordination with generator capability.
Percentage differential (87G) – for internal phase and ground faults
Loss‑of‑field (40) – detects excitation failure
Reverse power (32) – prevents motoring
Overexcitation (24) – V/Hz protection
Stator overcurrent (50/51) – instantaneous and time‑overcurrent
Voltage protection (59/27) – overvoltage and undervoltage
Frequency protection (81O/U) – overfrequency and underfrequency
RS‑485 with Modbus RTU and DNP3, optional Ethernet with Modbus TCP and IEC 61850.
Protection of medium to large synchronous generators in utility and industrial plants.
In summary, the Basler Electric BE1‑GPS offers a complete, reliable, and flexible protection solution for synchronous generators.



