Over and Under Voltage Protector – MUTAI Electrical Manufacturer

Short Description:

The Over and Under Voltage Protector is a smart protection device designed to safeguard electrical equipment from unstable power supply. It automatically disconnects the circuit when the voltage goes too high or too low, and reconnects once the voltage returns to normal, ensuring reliable and safe operation for home appliances, industrial machinery, and commercial systems.

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What is Over and Under Voltage

Over and under voltage refers to abnormal power supply conditions where the voltage goes outside the safe operating range.

● Over Voltage: The supply voltage becomes too high, which may damage electronic components, reduce equipment lifespan, or even cause serious safety risks.

● Under Voltage: The supply voltage drops too low, leading to excessive current, overheating, or malfunction of electrical devices such as motors and home appliances.

What is Over and Under Voltage Protector

Main Functions of Over and Under Voltage Protector

1. Over Voltage Protection

● Cuts off power automatically when voltage exceeds the set limit.

2. Under Voltage Protection

● Disconnects the circuit when voltage drops below the safe range.

3. Automatic Recovery

● Restores power supply once voltage returns to normal, with delay for stability.

4. Delay Function

● Prevents frequent tripping caused by instant voltage fluctuations.

5. Status Indication

● LED indicators (and optional alarm) show real-time working status.

6. Comprehensive Protection

● Some models include overcurrent protection for enhanced safety.

Main Components of Over and Under Voltage Protector

1. Voltage Sensing Unit – Monitors the power supply in real-time and detects over or under voltage conditions.
2. Control Unit / Logic Circuit – Receives signals from the sensing unit and decides whether to disconnect or reconnect the circuit. Some models use a microprocessor for smarter protection.
3. Switching / Relay Unit – Executes the disconnection or reconnection of the circuit through relays or solid-state switches.
4. Delay Mechanism / Timer – Introduces a delay for switching to prevent frequent operations caused by transient voltage fluctuations.
5. Indicator & Alarm Unit – Displays voltage status via LEDs or screens, with optional audible alarms for abnormal conditions.
6. Enclosure / Housing – Provides safety protection, isolates the internal circuit, and prevents electric shock or external damage.

MUTAI Over and Under Voltage Protector

The MUTAI Over and Under Voltage Protector is a reliable and efficient device designed to protect electrical equipment from unstable voltage conditions. It monitors the power supply in real-time and automatically disconnects the circuit when the voltage exceeds or drops below the safe range. Once the voltage stabilizes, the device reconnects the circuit with a built-in delay to ensure smooth and safe operation.

Equipped with LED indicators and optional alarms, it clearly shows system status and provides comprehensive protection for home appliances, industrial machinery, and commercial equipment.

Manufactured under ISO 9001 quality management and ISO 14001 environmental standards, and compliant with IEC 60947 and CE certifications, the MUTAI Over and Under Voltage Protector ensures safety, reliability, and global compliance. Compact, durable, and easy to install, it is a smart choice for efficient voltage protection you can trust.

Technical Specifications

Single Phase Over and Under Voltage Protector
Model	CMTGQ-63-S
Supply terminals	N.L
Rated supply voltage	AC 220V ; DC 80-300V
Rated frequency	40/50/60/70 Hz
> U setting range	AC 130-300V ; DC 130-300V
< U setting range	AC 80-210V ; DC 80-210V
Vollage hysteresis	5V
Overvoltage trip delay	0.5s
Voltage accuracy	<1%
Max. operating phase voltage	350V
Max. operating current	40A/63A
altitude	≤2000m
Ambient temperature	-25℃~+50℃
Permissable relative humidity	≤50% at 40℃(without condensation)
Storage temperature	-25℃~+55℃