YOSHINE Single-Phase Automatic Reset Voltage Protection Relay

The YX742S1R5 Single-Phase Automatic Reset Voltage Protection Relay is developed for 220–240VAC/DC single-phase power networks. It provides reliable monitoring and automatic disconnection in response to voltage abnormalities, supporting stable operation of electrical systems in residential buildings, commercial facilities, and industrial applications.

This model supervises voltage conditions within a 155–315VAC/DC range, covering both under-voltage and over-voltage protection requirements. When the supply voltage deviates from preset safe limits, the relay disconnects the load to help reduce stress on connected equipment. After the voltage stabilizes within the normal working range, the device automatically reconnects the circuit, restoring power without the need for manual resetting.

The YX742S1R5 is suitable for regions using 220V or 230V standards and can be applied in distribution boards, motor protection systems, air conditioning units, refrigeration equipment, pumps, and other single-phase devices. Continuous voltage monitoring helps reduce interruptions caused by unstable grids and supports longer service life of electrical components.

With a practical structural design, the relay can be installed in standard control panels or DIN rail systems. Its operational logic is straightforward, allowing efficient integration into new or existing power protection systems. The automatic reset function improves operational convenience in environments where power fluctuation occurs periodically.

Designed for mid-to-high voltage single-phase systems, the YX742S1R5 provides steady voltage supervision and automatic recovery performance. It is a functional choice for maintaining electrical stability across a wide range of 220–240V applications.