DIN Rail Adjustable Voltage & Current Protection Relay

Protect your home, office, or industrial electrical system with this advanced DIN Rail Adjustable Over & Under Voltage Protection Device. Engineered for reliable power management, this smart relay safeguards connected equipment against voltage fluctuations, overload, and overcurrent damage, ensuring maximum electrical safety and longer appliance lifespan.

Designed for single-phase AC systems, it offers real-time voltage and current monitoring, automatic fault recovery, and fully adjustable protection settings for customized performance.

Key Features

✔ Over-Voltage Protection
Automatically disconnects power when voltage exceeds the preset safety limit.

✔ Under-Voltage Protection
Prevents damage caused by low-voltage conditions.

✔ Over-Current Protection
Protects circuits and appliances from overload and excessive current draw.

✔ Automatic Recovery Function
Restores power automatically after voltage/current returns to safe levels.

✔ Real-Time Digital Display
Displays live voltage and current measurements for easy monitoring.

✔ Adjustable Protection Settings
Customize voltage/current thresholds and delay times according to your needs.

✔ Voltage Calibration Support
Fine-tune voltage accuracy up to ±10%.

✔ Fault History Inquiry
Quickly review fault records for system diagnostics.

✔ Factory Reset Function
Restore default settings easily when required.

✔ 35mm DIN Rail Mounting
Simple installation for distribution boards and electrical panels.

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Technical Specifications

230V Version

Power Supply:
230VAC, 50/60Hz

Current Capacity:

• 40A Model: Adjustable 1–40A (Default: 40A)
• 63A Model: Adjustable 1–63A (Default: 63A)

Over-Voltage Protection

• Adjustable Range: 230V – 300V / OFF
• Default Setting: 270V
• Recovery Voltage: 225V – 295V
• Default Recovery: 250V
• Action Time: 0.1 – 30 sec
• Recovery Delay: 1 – 500 sec

Under-Voltage Protection

• Adjustable Range: 140V – 210V / OFF
• Default Setting: 170V
• Recovery Voltage: 145V – 215V
• Default Recovery: 190V
• Action Time: 0.1 – 30 sec
• Recovery Delay: 1 – 500 sec

Over-Current Protection

40A Model: 1–40A
63A Model: 1–63A

• Default Setting: 20A / 40A
• Action Time: 0.1 – 30 sec
• Recovery Delay: 1 – 500 sec

Additional Specifications

• Power-On Delay: 1 – 500 sec
• Power Consumption: <2W
• Electrical Life: 100,000 cycles
• Installation: 35mm DIN Rail

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110V Version

Power Supply:
110VAC, 50/60Hz

Current Capacity:
1–63A Adjustable (Default: 63A)

Protection Settings

Over-Voltage Protection:
80V – 300V / OFF

Under-Voltage Protection:
80V – 300V / OFF

Over-Current Protection:
1–63A Adjustable

Response Time:
0.1 – 30 sec

Recovery Delay:
1 – 500 sec

Power-On Delay:
1 – 500 sec

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Smart Control Functions

Factory Reset:
Press and hold the DOWN button for 12 seconds

Fault Record Check:
Press and hold the UP button for 12 seconds

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Ideal For

• Homes & Apartments
• Solar Power Systems
• Offices
• Industrial Panels
• Server Rooms
• Sensitive Electronic Equipment

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Reliable Protection for Stable Power

Ensure uninterrupted performance and protect your valuable electrical appliances with this high-precision adjustable protection relay — a must-have safety solution for modern electrical systems.