Phase sequence protectors are essential devices in industrial and automation applications, designed to monitor and safeguard three-phase electrical systems. These protectors detect incorrect phase sequences (e.g., reversed phases), voltage imbalances, or phase loss, preventing damage to motors, pumps, compressors, and other three-phase equipment. Key features include adjustable voltage thresholds, LED or relay-based indicators, and compact DIN rail mounting for easy integration. Common products in this category include digital phase sequence relays, electromechanical phase monitors, and multifunctional protection devices with built-in timers or alarms. They are widely used in HVAC systems, conveyor belts, CNC machines, and other automation setups requiring reliable phase monitoring.