Basler Electric BE146N Negative Sequence Overcurrent Relay

Basler Electric BE1-46N (BE146N) Negative Sequence Overcurrent Relay is a protective device that monitors the negative-sequence component of current to detect unbalanced faults on generators and power systems and initiate a trip when the fault current exceeds a programmable pickup value. It accepts current-sensing inputs to derive the negative-sequence current and provides a time-setting control (TIME) that determines the delay before tripping, with the setting expressed on the front panel in units indicated as X10 SEC. The unit's front panel includes a PUSH TO ENERGIZE control and status indicators for outputs such as TRP (trip) and ALM (alarm), and it supports CAL and TAP ADJUST controls for calibration and test adjustment. Typical applications include protection of generator circuits and other power-system assets where maintaining balance is critical, with negative-sequence protection coordinating with other overcurrent protections to isolate unbalanced faults quickly and reliably.