The BE1-51/27R Single-Phase Time Overcurrent Relay with Voltage Restraint is a microprocessor-based protective relay designed to provide reliable overload and fault protection for 50 Hz and 60 Hz power systems. Combining single-phase time overcurrent protection with voltage restraint functionality, it helps improve protection coordination and system stability in demanding electrical applications. Its versatile design and dependable operation make it an ideal solution for utility, industrial, and power generation systems requiring accurate fault detection and enhanced equipment protection.