Large Screen Voltage Current Protector

The Large Screen Voltage Current Protector LD018-63 is a digital over and under voltage protection device designed for single-phase AC power distribution systems. It monitors real-time voltage and current, displays operating values on a large digital screen, and disconnects the circuit when abnormal voltage or over-current conditions are detected. By combining over-voltage protection, under-voltage protection, over-current protection, adjustable delay settings, and automatic recovery, it helps protect household appliances, shop equipment, small machinery, control panels, and other electrical loads from unstable grid conditions.

This product is suitable for AC 220V systems with an operating voltage range of AC80V to AC400V. It supports adjustable current protection up to 40A or 63A depending on the product label, making it useful for residential distribution boxes, commercial branch circuits, and light-duty industrial power protection. The large screen design allows users and electricians to quickly read voltage, current, and protection status, reducing troubleshooting time and improving daily electrical safety management.

• Large digital display for clear real-time voltage and current monitoring.
• Over-voltage, under-voltage, and over-current protection in one compact device.
• Adjustable voltage protection, recovery values, delay time, and calibration settings.
• Automatic disconnection when voltage or current exceeds the configured threshold.
• Automatic recovery after voltage returns to the normal range and the reset delay is completed.
• Wide operating voltage range for single-phase AC systems.
• Compact modular body with 36mm width, suitable for standard distribution boxes.
• Designed for homes, shops, offices, rental properties, small workshops, and equipment panels.

• Residential distribution boards requiring voltage fluctuation protection.
• Commercial shops, offices, rental apartments, and small public facilities.
• Protection for refrigerators, air conditioners, pumps, lighting circuits, and general appliances.
• Small workshops and equipment panels where unstable voltage or current overload may occur.
• Electrical systems that require visible monitoring of voltage and current values.

Installation should be completed by a qualified electrician after the upstream power supply has been disconnected. The protector should be installed in a suitable distribution box, and the wiring must follow the product marking for input and output terminals. All terminals must be tightened securely to avoid loose connections, overheating, or inaccurate measurement. After wiring is completed, check the voltage level, current rating, and protection settings before energizing the circuit.

During operation, the large digital screen displays the circuit status for easier inspection. If the voltage is higher than the over-voltage setting, lower than the under-voltage setting, or the load current exceeds the current limit, the connected appliances will automatically shut down. After the fault condition is removed and the recovery delay is completed, the protector can restore power according to the configured settings.

Check the display, wiring terminals, and load current regularly. If the device trips frequently, do not simply raise the protection limit without checking the actual circuit condition. Frequent tripping may be caused by unstable grid voltage, excessive load, poor wiring, or equipment faults. Select the 40A or 63A version according to the actual protected circuit and product label. For important loads, protection thresholds should be set based on equipment voltage tolerance and local electrical regulations.

For project selection or bulk purchasing, please provide the required current rating, voltage system, quantity, application environment, and any special setting requirements. Our team can help confirm the suitable LD018-63 Large Screen Voltage Current Protector configuration and provide product data, quotation support, and delivery information for your electrical protection project.