Over and Under Voltage Relay

XENHO, a professional manufacturer in China, provides quality Over and Under Voltage Relays. These relays feature a built-in self-diagnostic system that monitors the equipment's operating status in real time, quickly indicating the fault type via LED indicators when abnormalities occur. They adopt a modular design for easy installation, allowing direct rail mounting within a distribution box, saving space and facilitating maintenance. All components are RoHS certified, environmentally friendly, and the high-temperature resistant, flame-retardant casing effectively enhances safety. Multiple units can be connected in parallel for expansion, meeting different load capacity requirements. Widely used in smart homes, data centers, medical equipment, and precision instrument power supply protection scenarios, XENHO provides users with a stable and reliable voltage protection solution.

What is an Over and Under Voltage Relay?

An Over and Under Voltage Relay is an intelligent protection device that, by integrating advanced sensing and control modules, triggers a relay action the instant a voltage anomaly occurs, thereby ensuring that electrical equipment operates within a safe voltage range. With a response time of less than 0.1 seconds, it supports both manual reset and automatic recovery modes. It is suitable for a wide variety of load scenarios—including air conditioners, refrigerators, and industrial motors—and comprehensively enhances the stability and safety of power systems.

Key Advantages

1. Equipped with multiple protection mechanisms and a high-reliability design, enabling stable operation even under extreme grid conditions;

2. Compact in size and easy to install—compatible with standard DIN rails—significantly reducing installation complexity and maintenance costs;

3. Features a fully sealed structure that effectively prevents dust and moisture ingress, thereby extending the product's service life;

4. Supports real-time status monitoring and remote alarm linkage, enhancing the level of intelligent management;

5. Broadly compatible with a wide range of electrical devices, providing comprehensive voltage protection for both residential and industrial users.

Product Specifications

Packaging and Shipping

Our packaging utilizes industrial-grade, shock-resistant, and compression-proof color boxes, featuring internal EPE foam inserts to securely cradle the product and ensure it remains undamaged during transit. Each relay is individually packaged and includes a Certificate of Conformity, an instruction manual, and a kit of installation accessories.

Compatibility with Sea, Land, and Air Freight

We support a wide range of transportation methods; whether facing the prolonged vibrations of sea freight, the challenging road conditions of land transport, or the rapid transit of air freight, we guarantee that our products will arrive safely at their destination. The product packaging is designed to comply with international shipping standards, effectively withstanding moisture, vibration, and impact to provide a worry-free logistics experience for users worldwide. 

Technical Specifications

Operating Voltage Range: AC 100–275V, Frequency 50/60Hz;

Overvoltage Protection Threshold: 275 ± 5V;

Undervoltage Protection Threshold: 170 ± 5V;

Accuracy Class: ±1%;

Relay Contact Capacity: 16A/250VAC;

Applicable Wire Cross-Sectional Area: 0.75–2.5 mm²;

Environmental Adaptability: Operating Temperature -30°C to +70°C;

Relative Humidity: ≤95% RH (Non-condensing);

Protection Class: IP20; Compliant with GB/T 14598 and IEC 61000 EMC standards; Features protection capabilities against electrostatic discharge and fast transient burst pulses.

Loading and Shipping

Contact Us

For any inquiries about our products, please feel free to contact us through the following methods:

WhatsApp / WeChat: 86-13123865875     86-15858812131

Email: 799199031@qq.com