The KAEL SAMWHA ATR-80A DSP Phase Automatic Changeover Relay is an advanced protection and control device designed for three-phase electrical systems. It ensures continuous power supply by automatically detecting faulty phases and switching to the healthiest available phase without manual intervention.
This relay is built with DSP (Digital Signal Processing) technology, allowing precise monitoring of voltage conditions, phase sequence, and phase failure. It protects electrical systems from common issues such as phase loss, voltage imbalance, and over/under voltage conditions, helping to prevent equipment damage and downtime.
With a current handling capacity of up to 80A, it is suitable for industrial, commercial, and heavy residential applications. The device supports 3×380V AC systems with neutral and operates efficiently across both 50Hz and 60Hz frequencies.
The ATR-80A features an adjustable delay time for phase switching, ensuring stable transitions and preventing frequent switching due to minor fluctuations. Its LED display provides real-time monitoring of voltage and phase status, improving system visibility and control.
Designed for convenience, it can be easily mounted on a DIN rail or installed داخل control panels. Its compact and durable build ensures long-term performance even in demanding environments.
This auto phase selector is an essential device for maintaining system stability, reducing downtime, and protecting valuable electrical equipment in areas with unstable or fluctuating power supply.
Key Features:
Model: ATR-80A
3 phase automatic phase changeover relay
Rated current: up to 80A
DSP-based intelligent phase monitoring
Automatic switching to available healthy phase
Protection against phase failure and phase reversal
Over voltage and under voltage protection
Voltage imbalance detection
Adjustable switching delay (3–300 seconds)
LED display for real-time monitoring
Supports 3×380V AC systems (50/60Hz)
DIN rail or panel mounting
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