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The Over Under Voltage Protector is an all in one single phase safety device integrating overvoltage protection, undervoltage protection, and overcurrent protection, purpose built for enterprise grade power distribution and small scale commercial electrical systems. It features a color LCD dual display for real time voltage and current monitoring, ergonomic raised buttons for easy operation in low light environments, and an automatic power cut mechanism to block appliance damage and fire risks caused by unstable power. With a standard DIN rail mount, it integrates seamlessly into commercial electrical cabinets, delivering stable, long life protection for enterprise power safety and intelligent distribution management.
This unit unifies overvoltage, undervoltage, and overcurrent tripping in one module, eliminating the need for multiple separate components and simplifying cabinet layout while strengthening circuit safety.
The color LCD dual screen shows live voltage and current values clearly, enabling enterprise maintenance teams to quickly judge grid status and reduce troubleshooting time.
Adopting a robust mechanical structure and precision sensing assembly, it ensures consistent action under long term operation, lowering failure rates and maintenance costs for enterprise users.
Ergonomic raised buttons support smooth setup even in dim distribution rooms; the DIN rail design fits standard enclosures, cutting on site installation labor and time.
Suitable for retail outlets, office buildings, small factories, and rental properties, it provides stable power protection for daily loads and high power equipment alike.
Parameter | Value |
Rated voltage | AC 220V |
Operating voltage range | AC 80-400V |
Frequency | 40-70Hz |
Rated current | 40A/63A |
Over-voltage setting range | 230-300V |
Under-voltage setting range | 140-210V |
Reset/startup delay | 1-999s |
Voltage measurement accuracy | 2% |
Protection level | IP 20 |
Width | 45mm |
Height | 45mm |
Depth | 50mm |
Small Enterprise Workshops: Protect motors, pumps, and machining equipment from voltage surges/drops. - Retail & Chain Stores: Safeguard cash registers, lighting, and refrigeration units. - Office Buildings: Stabilize power for computers, servers, and HVAC systems. - Rental & Multi Tenant Properties: Prevent cross circuit interference and equipment burnout. - EV Charging Stations: Support stable low power AC charging points with reliable protection.
Turn off upstream power; prepare screwdriver, multimeter, and insulated gloves.
Clip the protector onto a 35mm DIN rail inside the distribution cabinet; ensure firm locking.
1. Connect L (live) and N (neutral) from the mains supply to the IN terminals. 2. Connect load side L and N to the OUT terminals; never reverse input/output. 3. Tighten all terminals to specified torque to avoid loose connections or overheating. 4. Restore power and verify LCD readings; check automatic tripping under abnormal voltage.
Comply with local electrical codes; do not use beyond rated voltage/current.
Yes, it automatically reconnects once voltage returns to the safe range, reducing manual intervention.
This model is single phase; we offer dedicated three phase over under voltage protectors for three phase grids.
Mechanical life exceeds 40,000 operations; normal service life is 5–8 years.
Yes, overvoltage and undervoltage trigger values are adjustable via front buttons to match site needs.
For outdoor use, install in a waterproof, dustproof distribution box to ensure performance.
