Best Phase Monitoring Relays of 2025

The Kuuleyn Phase Monitoring Relay offers robust protection for your electrical systems. Its rail type installation ensures easy mounting, while three indicators keep you informed of the operational status. With reverse phase protection, you can prevent incorrect connections, enhancing safety. The phase loss protection feature alerts you to any failures during operation, giving you peace of mind. Additionally, voltage imbalance protection safeguards against unsafe operating conditions, ensuring your equipment runs smoothly and reliably.

The YWBL-WH Voltage Relay is an essential tool for real-time monitoring of DC voltage levels. With its two sets of normally open and normally closed contacts, you can easily manage various operational conditions. The built-in indicator lights provide clear visual feedback, so you are always aware of the system's status. Additionally, the relay requires no extra power supply, simplifying installation and operation for users. Its design for a 35mm guide rail makes it user-friendly and straightforward to fit into existing systems.

The Nikou Phase Monitoring Relay offers a strong anti-interference function, ensuring more stable operation for your systems. Its compact design makes it convenient to use, fitting easily into various setups. This relay is built for continuous and efficient performance, enabling you to rely on it for extended periods. Additionally, it checks for phase sequence and missing phases, helping you verify that your electrical systems are functioning correctly and safely.

The SEAFRONT Voltage Monitoring Relay offers comprehensive voltage monitoring for 3-phase, 4-conductor systems with a measuring range of 101V-318V. This device ensures phase protection, alerting you to any phase sequence or failure issues through its LED indicators. You can monitor the relay's own working voltage with real effective value measurement, enhancing reliability. Additionally, the precise measurement feature boasts an accuracy of less than 1%, allowing for dependable operation and peace of mind in your electrical systems.

The Kuuleyn GRV8-03 Relay is a versatile monitoring device designed to keep track of your working voltage. By preventing phase failure of power loads, this relay safeguards your equipment from accidents caused by reverse operation. The LED display provides a clear indication of the relay's working status, ensuring you remain informed at all times. Additionally, its ultra-small size makes installation a breeze, perfect for various setups. With adjustable rated voltages, it is suitable for use in any region worldwide.

The Vikye TG30 Relay offers essential protections for three-phase motors and equipment. With phase loss protection, you are alerted if any phase fails, ensuring your equipment runs safely. The phase reversal protection safeguards against incorrect connections, preventing potential damage. Voltage imbalance protection detects significant voltage discrepancies, while the delay protection feature provides a brief pause before reacting to faults, allowing for a more controlled response. This combination of features helps you maintain the efficiency and safety of your machinery.

The Oumefar TG30 Relay is an advanced phase sequence protection device designed for efficient monitoring of three-phase systems. Its ultra-small size makes it easy to install without taking up much space. Additionally, it features waveform detection, allowing you to quickly identify any abnormalities in your power supply, ensuring that your motor operates smoothly. The quick response capability of the relay means you can rely on it to protect your equipment from issues like phase loss and imbalances, enhancing the overall safety of your operations.

The GRV8-04 Delay Relay is a versatile device designed to enhance control over various industrial applications. It boasts ten delay functions, including delay on and delay off, allowing you to customise timing for tasks like lighting or motor control. With an impressive adjustment range from 0.1 seconds to 10 days, you can easily set the desired delay using the convenient control knob. The relay's status is clearly indicated by an LED light, ensuring you remain informed about its operation at all times.

The JFY-5-1 Voltage Relay offers real-time monitoring of three-phase systems for overvoltage, undervoltage, phase loss, and voltage unbalance. This feature ensures that you can promptly detect any faults, helping to protect your electrical equipment. Made from high-quality materials, it promises durability and reliability for long-term use. Additionally, it includes a phase failure protector that has undergone rigorous testing, ensuring safety and efficiency. With adjustable settings for overvoltage, undervoltage, and imbalance rates, you can tailor it to your specific needs.

The YWBL-WH Voltage Relay offers vital over-voltage and under-voltage protection for your DC systems. With a rated voltage range of DC 12V to 48V, it effectively safeguards your equipment against harmful voltage fluctuations. The 35mm guide rail design ensures easy installation, making it convenient for users. Additionally, it features two sets of contacts and indicator lights, providing clear visual feedback on its operational status, which enhances user awareness and control.