APR-4 Phase Protector Device
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The APR-4 is a three-phase motor protection relay designed to safeguard pumps, fans, and other industrial equipment operating on 380V systems from phase loss, phase imbalance, and incorrect phase sequence. It offers automatic monitoring and disconnection to prevent costly motor burnout. While it sits in a niche category, it delivers reliable protection for industrial and agricultural three-phase setups at an accessible price point.
Key Features & Specs
| Voltage | Designed for 380V three-phase electrical systems |
|---|---|
| Protection Type | Guards against phase loss, phase imbalance, phase reversal, and undervoltage conditions |
| Compatibility | Suitable for three-phase motors including pumps, fans, compressors, and similar equipment |
| Response | Automatic relay disconnection upon fault detection to prevent motor damage |
| Display | LED indicator lights for quick fault status identification |
| Mounting | Compact DIN rail-compatible housing for standard electrical panel installation |
| Reset | Automatic or manual reset function depending on fault condition clearance |
Best for: Industrial operators, electricians, and farm owners who need affordable and reliable phase protection for three-phase motors running pumps or ventilation fans on 380V systems.