Best Phase Monitoring Relays of 2026

The Omron Phase Monitoring Relay is designed to help you keep your electrical systems running smoothly. It operates within a wide voltage range of 200 to 480 volts AC, making it suitable for various industrial settings. With a double-pole double-throw (DPDT) contact configuration, it offers reliable switching capabilities to protect your equipment. The relay can handle currents up to 5 amps, ensuring it supports moderate electrical loads safely. This Omron Phase Monitoring Relay is an essential tool for monitoring and maintaining the proper phase conditions in your electrical circuits, helping prevent damage and downtime.

The Time Mark Phase Monitor helps you keep your electrical system safe by checking for voltage problems like too high or too low voltage. It also detects if a phase is missing or reversed, which can prevent damage to your equipment. This monitor supports four different voltage levels, including 480VAC, giving you flexibility for various setups. Plus, it lets you adjust how quickly it responds to changes, so you can customize it to your needs. With the Time Mark Phase Monitor, you get reliable protection and control to ensure your system runs smoothly and safely.

The Walfront Voltage Relay is designed for easy installation and reliable performance in managing voltage levels for electric motors. With three reset modes—manual, automatic, and automatic with a power-on delay—you can choose the best option for your needs. It automatically identifies whether the voltage is AC or DC, eliminating the hassle of manual switching. Additionally, the built-in LCD display shows real-time voltage values and fault statuses, making it convenient for you to monitor your system. The relay also records faults, ensuring you have a comprehensive view of any issues that arise.

The EVTSCAN Phase Monitoring Relay is designed to keep your motors running smoothly by monitoring phase sequence and loss. This ensures that your equipment operates correctly, preventing potential damage from incorrect phase setups. With its robust anti-interference performance, you can rely on it even in electrically noisy environments. This relay also helps to extend the lifespan of your motors by detecting issues early, allowing for timely interventions. Its compact size makes installation a breeze in tight spaces, giving you flexibility in various systems.

The YWBL-WH Voltage Relay is designed to help you protect and manage your equipment efficiently. It’s great for use with cranes, elevators, and refrigerated trucks, preventing damage caused by reverse connections or phase failures. The built-in LED indicator lets you easily see the relay’s status at a glance, so you know when it’s working. With high accuracy and eight adjustable voltage settings, you can be confident the relay measures voltage precisely, ensuring your equipment runs smoothly. Plus, it monitors its own operating voltage using true RMS measurement, giving you reliable and accurate performance every time.

The YWBL-WH Voltage Relay is an essential tool for monitoring electrical systems. It accurately measures operating voltage with a true RMS measurement, ensuring you can trust the readings. With eight adjustable voltage settings and an accuracy of less than 1%, you can customize it to fit your specific needs. This relay not only helps prevent equipment malfunctions, such as reverse operation and phase failures, but also features an LED indicator for easy monitoring of its status. Additionally, its compact size allows for simple installation on a standard 35mm DIN rail, making it convenient for various applications.

The ABB Phase Monitor Relay helps you keep your three-phase motor safe by detecting imbalances in the power supply. This device is useful because unbalanced loads can cause your motor to overheat and waste energy, which can shorten its lifespan. Unlike other protection devices, this relay reliably spots ongoing imbalances that might otherwise go unnoticed, preventing costly motor damage. Additionally, it monitors phase sequence to ensure your motor runs in the correct direction, avoiding operational errors. Using this relay means you can protect your equipment more effectively and avoid unexpected downtime.

The YWBL-WH Phase Monitoring Relay is designed to ensure the reliable operation of your equipment. With its robust anti-interference capabilities, it helps maintain continuous and efficient motor performance. This relay detects phase sequence and phase loss effectively, alerting you when any issues arise. It is ideal for various applications, from motors to central air conditioning units, making it a versatile tool for everyday use. Compact and easy to install, it fits seamlessly into any space, allowing you to monitor your systems without hassle.

This monitoring relay is designed to monitor three phase voltage and insulation, with screw terminal and 2 CO contacts. It has a delay time and operates with 420-690 line supply voltage. The product is made in the United States and has a compact size of 22.5mm width. This relay is perfect for monitoring power systems to prevent damage to equipment and ensure safety.

The Walfront Voltage Protector is designed to ensure the safety of your equipment with its advanced features. It offers both automatic and manual reset options, allowing you to choose the best method based on your situation. You can easily adjust the overvoltage, undervoltage, and voltage imbalance settings to fit your specific needs, providing flexibility for various applications. Additionally, it continuously monitors your system in real-time to protect against issues like phase errors and disconnections, ensuring that your machinery operates smoothly and efficiently.