Over and Under Voltage Protector: Reliable Voltage Protection for Modern Electrical Systems

Voltage instability is one of the most common causes of damage to electrical equipment. Problems such as overvoltage, undervoltage, and sudden voltage fluctuations can shorten equipment lifespan, interrupt operations, and even lead to safety risks. To address these challenges, Mutai Electric Group offers a reliable and intelligent solution — the Single Phase Over and Under Voltage Protector.

What Is an Over and Under Voltage Protector?

An Over and Under Voltage Protector is a protective device designed to automatically disconnect the power supply when the voltage exceeds or falls below the preset safe range. Once the voltage returns to normal, the device can restore the circuit operation automatically.

Its primary function is to protect electrical equipment from damage caused by:

• Overvoltage — excessively high voltage that may damage circuits and appliances
• Undervoltage — low voltage conditions that may affect equipment performance or cause overheating
• Voltage fluctuations — unstable power supply conditions that reduce system reliability

This type of protector is widely used in residential, commercial, and industrial electrical systems to improve safety and equipment stability.

Application Scenarios

Single phase over and under voltage protectors are commonly used in:

• Residential distribution boxes
• Household appliances
• Air conditioners and refrigerators
• Office electrical systems
• Commercial equipment
• Small industrial control systems

By continuously monitoring voltage conditions, the protector helps prevent costly damage and reduces maintenance risks.

Mutai Single Phase Over and Under Voltage Protector

Mutai Electric Group’s CMTGQ-63-S Single Phase Over and Under Voltage Protector is designed for reliable performance and easy installation in modern electrical systems.

Key Features

• Rated supply voltage: AC 220V / DC 80–300V
• Wide adjustable voltage range:
  • Overvoltage setting: AC 130–300V / DC 130–300V
  • Undervoltage setting: AC 80–210V / DC 80–210V
• Fast overvoltage trip delay: 0.5s
• High voltage accuracy: <1%
• Maximum operating current: 40A / 63A
• Compact and practical design
• Stable operation under temperatures from -25°C to +50°C

The product is designed to provide precise voltage monitoring and quick response, helping protect electrical equipment from abnormal voltage conditions.

Designed for Safety and Reliability

Mutai’s voltage protector combines intelligent protection technology with practical engineering design. With stable performance, adjustable protection settings, and reliable operation, it offers an efficient solution for modern electrical protection needs.

At Mutai Electric Group, we continue to focus on developing safe, efficient, and innovative low-voltage electrical products to support customers worldwide.

Focus on Your Value

Whether for residential applications or commercial electrical systems, Mutai’s Single Phase Over and Under Voltage Protector helps improve power safety, equipment reliability, and operational stability — delivering dependable protection where it matters most.