TOMZN 3-in-1 Voltage Protector with Unit Lock & kWh Meter

The TOMZN 3rd Gen 3-in-1 Voltage Protector with Unit Lock is a multifunctional electrical protection device designed for compatible single-phase AC installations. Along with adjustable over-voltage, under-voltage and over-current protection, it features a built-in kWh energy meter for monitoring electricity consumption.

The Unit Lock feature is especially useful where users want to restrict access to the energy meter's unit-reading function, subject to the specific model's supported settings. This makes the device a practical option for selected shops, rental properties and electrical installations where energy consumption needs to be monitored.

Key Features

• Brand: TOMZN

• Product Type: 3-in-1 Voltage Protector with Energy Meter

• Rated Current: Up to 63A

• Unit Lock: Available on the supported version

• Over-Voltage Protection: Adjustable

• Under-Voltage Protection: Adjustable

• Over-Current Protection: Adjustable

• Built-in kWh Meter: Monitors accumulated electricity consumption

• Digital Display: Shows voltage, current and energy readings

• Reconnection Delay: Adjustable on supported models

• Installation: DIN-rail mounting

• Application: Compatible single-phase AC systems

Unit Lock Feature – Control Access to kWh Units

The Unit Lock feature is the key highlight of this TOMZN voltage protector. It is intended to restrict access to the energy meter's unit-reading function, depending on the exact version and its settings.

This feature may be useful for:

• Shops and commercial premises

• Rental properties

• Electricity consumption monitoring

• Installations where access to meter settings needs to be restricted

Please note: Confirm the exact Unit Lock operation and setup procedure for your supplied model before purchase. Unit Lock should not be described as a certified revenue-grade meter seal or tamper-proof system unless the manufacturer confirms this.

3-in-1 Electrical Protection

Over-Voltage Protection

Disconnects the output when the supply voltage exceeds the configured limit.

Under-Voltage Protection

Helps protect connected equipment by disconnecting the output when voltage falls below the configured threshold.

Over-Current Protection

Allows the current protection threshold to be adjusted within the device's supported range, up to 63A on the 63A version.

Built-In kWh Energy Meter

The integrated energy meter tracks accumulated electricity consumption, while the digital display provides electrical readings. This helps users monitor usage without installing a separate meter.

Suitable Applications

• Shops and small businesses

• Compatible home electrical distribution boards

• Rental properties and selected energy-monitoring installations

• Electrical equipment requiring voltage and current protection

• Installations where kWh monitoring is useful

Installation & Compatibility

Verify the model number, Unit Lock functionality, rated current, wiring diagram and applicable voltage settings before installation. Use suitable upstream circuit protection and correctly rated wiring. Installation should be performed by a qualified electrician.