Tomzn 4th Gen 2-in-1 Over Under Voltage Protector | TOVPD1-63 / TOVPD1-40

Tomzn 4th Gen 2-in-1 Over Under Voltage Protector

The Tomzn 4th Gen 2-in-1 Over Under Voltage Protector is designed for single-phase electrical installations where unstable mains voltage may put appliances and equipment at risk. Available as the TOVPD1-40 and TOVPD1-63 models, this DIN-rail device monitors the supply and disconnects the load when voltage moves outside the configured limits. When the supply returns to an acceptable level, its automatic reconnection function can restore power after the selected delay.

This protector is suitable for homes, offices, shops, workshops and selected solar or backup-power installations. Its colorful digital display gives the user a clear view of operating status, while adjustable protection settings allow a qualified installer to configure the device for the connected circuit and load. Choose the 40A or 63A version according to the circuit design, cable size and upstream protection—not simply the total advertised load.

Key Features

• Over-voltage protection: disconnects the connected load when the measured supply rises above the configured upper limit.
• Under-voltage protection: isolates the load when the supply falls below the configured lower limit.
• Automatic reconnection: restores the circuit after voltage stabilizes and the configured delay has elapsed.
• Adjustable settings: lets a competent installer select suitable protection thresholds and reconnection timing for the application.
• Colorful digital display: provides convenient voltage and operating-status information at the distribution board.
• 40A and 63A options: TOVPD1-40 and TOVPD1-63 models support different circuit requirements.
• DIN-rail installation: fits compatible electrical distribution boxes and keeps the installation organized.

Where Can It Be Used?

The Tomzn 4th Gen 2-in-1 Over Under Voltage Protector can be considered for a home main circuit, refrigerator or air-conditioner circuit, office equipment, small commercial distribution board, generator-backed supply or a compatible solar inverter input/output circuit. Application suitability depends on the equipment manufacturer’s instructions and the electrical design. For motors, compressors and sensitive electronic loads, the reconnect delay should be selected carefully so the equipment is not restarted too quickly after a voltage interruption.

For a coordinated installation, explore our distribution boxes and related circuit breakers. You can also browse more TOMZN electrical products available from HN Electric.

TOVPD1-40 vs TOVPD1-63

The Tomzn 4th Gen 2-in-1 Over Under Voltage Protector models provide the same basic over-voltage and under-voltage monitoring concept. The important difference is the rated-current option: 40A for TOVPD1-40 and 63A for TOVPD1-63. The correct selection must be based on the actual circuit current, conductor capacity, installation conditions and protective-device coordination. A higher ampere rating is not automatically safer. Never install a 63A model on wiring that is not designed and protected for that current.

Important Protection Note

This product is an automatic over/under-voltage protector. It should not be treated as a replacement for a miniature circuit breaker, residual-current device or dedicated surge protective device. An MCB provides overcurrent and short-circuit protection, an RCD/RCCB provides earth-leakage protection, and an SPD is designed to manage transient surge events. A safe distribution board may require several correctly coordinated devices, depending on the installation.

Installation and Buying Guidance

The Tomzn 4th Gen 2-in-1 Over Under Voltage Protector installation should be completed by a qualified electrician with the supply isolated. Before ordering, confirm the model printed on the product, rated current, single-phase supply compatibility, terminal arrangement, available DIN-rail space and the requirements of the connected equipment. The installer should use correctly sized conductors, tighten terminals to the manufacturer’s requirements, provide suitable upstream protection and test the protection and reconnection settings before energizing the final load.

Actual appearance, menu labels and configurable values can vary by production batch, so verify the markings and included instructions before setup. If you are unsure whether TOVPD1-40 or TOVPD1-63 suits your distribution board, contact HN Electric with your load details and installation photos for practical product-selection guidance.

Why Buy from HN Electric?

HN Electric supplies electrical protection, solar accessories and distribution equipment across Pakistan. We focus on clear product information and practical selection support so customers can order the right component for their project. Order the Tomzn 4th Gen voltage protector online, or contact us before purchase if your circuit requires technical confirmation.