Technical Specifications

Number of phases: 3
Nominal current: 220/230 VAC
Nominal voltage: 220V AC
Nominal current size: 63A
Maximum load power: 63A adjustable
Degree of protection: CCC, CE certificates
Switching time: <30 ms
LCD screen: Yes
Overvoltage protection value range: 240V–300V adjustable
Undervoltage protection value range: 140V–200V adjustable
Switch-on delay time: 1s–300s adjustable
Supply terminals: N, L1, L2, L3
Rated supply voltage: 220V AC
Rated frequency: 50/60Hz
Umax setting range: 230-300V
Umin setting range: 140-210V
Automatic delay time (Ton): 1-600s
Time delay for switching back to the priority phase: 1-600s
Time delay for switching to backup phase: <0.2s
Voltage hysteresis: 5V
Overvoltage shutdown delay time: 0.1s; ≥350V: 0.02s
Undervoltage shutdown delay time: 0.1s; ≥350V: 0.02s
Voltage accuracy: <1%
Maximum phase voltage operational level: 350V
Rated operating current: 63A
Maximum operating current: 80A
Pollution degree: 3
Ambient temperature: -25℃~+50°C

Applications

Voltage stabilization: The switch is designed to protect equipment from both overvoltage and undervoltage, helping to prevent potential failures or damage due to adverse voltage conditions.
Industrial and commercial systems: Used in industrial equipment, commercial areas, and production lines where voltage fluctuations may pose a risk to the equipment.
Power supply protection: Used as part of the power supply system to ensure a reliable and safe electricity supply, automatically switching phases if the voltage drops or exceeds safe limits.
Residential buildings: An excellent solution for homeowners seeking to ensure the protection and stability of their electrical devices, especially in homes where voltage fluctuations are frequent.
Advantages

Voltage protection: This device provides reliable protection against both overvoltage and undervoltage, preventing potential equipment failures and operational disruptions.
Fast switching time: The switching time of less than 30 ms ensures that voltage is quickly regulated, keeping the equipment protected from potential hazards.
Adjustable protection values: The ability to adjust overvoltage and undervoltage protection values allows for customization based on specific needs and operating conditions.
LCD screen: The LCD screen allows monitoring of voltage parameters and system status, making it easy for users to track system performance and identify potential deviations.
High reliability and certifications: The product has CCC and CE certifications, ensuring it meets high-quality and safety standards.
Disadvantages

Not recommended for outdoor use: The protection degree IP20 indicates that the device is not suitable for use in wet or open outdoor conditions, so it should be installed only indoors or in a protected environment.
Relatively high power: Although the nominal current of 63A is suitable for many industrial devices, this device may be excessive for lower power systems, making it difficult to apply in smaller loads.
Higher cost: Given the device's functionality and complexity, the price may be higher compared to simpler switching devices or basic voltage protection devices.
The voltage control protective relay is a high-quality and effective solution for industrial and commercial facilities where equipment protection from voltage fluctuations is needed. The adjustable overvoltage and undervoltage protection, fast switching time, and LCD screen provide easy monitoring of the device's condition and additional safety. While this device is a great choice for high-load systems, it should only be used in indoor, protected environments.