Basler Electric BE1-47N Negative Sequence Voltage Protective Relay

The Basler Electric BE1-47N is a negative sequence voltage protective relay designed to safeguard rotating equipment from damage caused by excessive negative-sequence voltage resulting from phase failure, phase unbalance, or reversed-phase sequence. It responds specifically to true negative sequence voltage (V2) for improved protection accuracy and offers a wide settings range, a low sensing burden, and a low‑burden power supply to minimize PT costs and battery load. User‑friendly features include a simple HMI for straightforward configuration, LED annunciators that clearly indicate status, and test paddles that enable in‑circuit testing without removing equipment. Protection timing for the 47N function can be configured with definite‑time or inverse‑time characteristics, as described in Basler's BE1-47N instruction manual.