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

Yueqing Huilong’s phase monitor relays are advanced protection devices designed to monitor and safeguard three-phase electrical systems against critical faults. These relays combine microprocessor-based technology with analog sensing to detect phase loss, reversal, unbalance, and under/over voltage conditions. They feature adjustable trip settings for voltage (50-130%) and phase sequence (1-5 seconds), with response times ≤0.1 seconds to prevent equipment damage. The relays offer both local (LED indicators) and remote (RS485 interface) fault monitoring, simplifying system diagnostics. Constructed with DIN rail-mount housings (48mm width) and flame-retardant materials, they meet IEC 60255 standards, ensuring reliability in motors, generators, and industrial machinery across manufacturing, energy, and infrastructure sectors.