Tomzn 4-Line 75A Selector Switch – Phase & Neutral

The Tomzn 4-Line 75A Selector Switch is a manual rotary changeover device for selecting one available electrical source from up to four incoming lines. It switches phase and neutral together and provides a clear OFF position before the four selectable positions. This makes it a practical component for purpose-built distribution panels serving shops, apartments, offices, workshops and other installations where an electrician has designed a controlled multi-source arrangement.

Tomzn 4-Line 75A Selector Switch Operation

This selector is intended for deliberate, manual switching. The operator turns the handle to the required numbered position after confirming that the selected source is suitable for the connected load. The switching sequence is listed as 0-1-2-3-4, giving one OFF position plus four source positions. Because selection is manual, the device does not automatically transfer power when a supply fails.

The product is rated at 75A and is listed for 230V to 400V AC systems. Actual usable load depends on the complete installation, conductor size, enclosure, temperature, protective devices and local electrical requirements. A qualified electrician should verify the design rather than selecting the switch only by its headline current rating.

Product details

• Brand: TOMZN
• Product type: Manual rotary selector / changeover switch
• Incoming selections: Four lines
• Switching: Phase and neutral selection
• Rated current: 75A
• Listed voltage: 230V-400V AC
• Positions: 0-1-2-3-4
• Operation: Manual

Where this selector switch can be used

The Tomzn 4-Line 75A Selector Switch can be considered for multi-meter panels, shared commercial premises and other installations that require one load to be connected to one chosen source at a time. It may also form part of a properly engineered arrangement involving utility, generator or inverter supplies, provided every source is electrically compatible and the panel is designed to prevent unintended source interconnection.

This is a selector switch, not a circuit breaker, surge protector or automatic transfer switch. It does not replace correctly rated overcurrent protection, isolation, earthing or other safety equipment. Browse our distribution boxes for panel-building options, or explore more TOMZN electrical products.

Important installation guidance

The Tomzn 4-Line 75A Selector Switch should be installed only by a qualified electrician. All incoming supplies must be fully isolated and verified de-energized before wiring begins. The electrician must follow the terminal diagram supplied with the actual unit, confirm conductor sizing and tightening torque, and ensure the enclosure provides appropriate protection and spacing.

• Never connect or disconnect conductors while any source is energized.
• Design the panel so separate sources cannot be paralleled or back-fed.
• Confirm neutral switching and earthing arrangements for the specific system.
• Use correctly rated upstream and downstream protective devices.
• Label every source and selector position clearly for the operator.
• Test isolation and switching operation before placing the installation in service.

Why choose this TOMZN selector?

Its four selectable inputs make this model useful where a two-source changeover is not enough. The front rotary control gives the operator an easy-to-understand selection method, while the OFF position supports controlled manual operation. When installed in a properly designed panel, it offers a neat way to organize source selection without relying on loose connections or unsafe temporary wiring.

For long-term reliability, the completed panel should be inspected periodically for signs of overheating, loose connections or physical damage. The switch should never be operated if the enclosure, handle or wiring appears damaged. Keep the panel dry, accessible to authorized users and clearly labelled for safe routine operation.

Ordering from HN Electric

Before ordering the Tomzn 4-Line 75A Selector Switch, compare the product photographs, current rating, voltage range, number of source positions and terminal arrangement with your panel design. If you are unsure whether this model is appropriate, share your load details and installation requirements with HN Electric before purchase. Professional installation is essential for safe operation.