Phase Sequence Relay for Three-Phase Power Safety [Instant Fault Detection]

Yueqing Huilong’s three phase failure relay is a specialized protection device designed to detect and respond to faults in three-phase systems, including phase loss, reversal, and unbalanced voltages. This relay employs advanced analog circuitry to monitor phase sequences and voltages, with a response time of ≤0.2 seconds to prevent equipment damage. It offers adjustable voltage thresholds (50-130% of rated voltage) and phase sequence detection, suitable for global industrial applications. The relay features a compact housing (35mm DIN rail mount) with fault indication LEDs and both audible alarms, simplifying maintenance. Constructed with surge protection (1000V dielectric withstand), it ensures reliability in harsh industrial environments, protecting motors, generators, and transformers from costly failures.