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Three-Phase Reversing Switch Box 400V 16A with Socket
Three-Phase Reversing Switch Box 400V 16A with Socket
Three-Phase Reversing Switch Box 400V 16A with Socket
Three-Phase Reversing Switch Box 400V 16A with Socket

Three-Phase Reversing Switch Box 400V 16A with Socket

€248.27
€496.54
Tax included

Ensure the continuity and safety of your electrical installations with this 400V 16A three-phase transfer switch box with 3 surface-mounted sockets. It includes a Resi9 4P 63A 300 mA sensitivity residual current switch, two Resi9 4P 25A 400V Curve C modular circuit breakers, a ONCCY EATS2 4P 63A automatic transfer switch and three IP44 secure sockets, offering complete protection against overloads, short circuits and power outages.

The transfer switch automatically switches between a main source (grid) and a backup source (battery, inverter, generator or solar) in less than 50 milliseconds, ensuring continuous power supply for your sensitive equipment: servers, photovoltaic systems with storage, professional freezers or medical devices.

The 3 surface-mounted sockets allow you to safely connect multiple devices thanks to their waterproof cover, child protection and screw terminals. Compact and modular, the box is easily installed on a DIN rail, ideal for domestic, commercial and semi-industrial installations.

Reliable and durable, this box supports more than 8,000 switching cycles and operates in a range from -5°C to +40°C. Combined with suitable protections, it forms a complete and secure system for all your critical installations.

25 items in stock!

400V 16A three-phase transfer switch with socket – Protection and power continuity


The 400V three-phase automatic transfer box is the all-in-one solution for ensuring the safety and availability of your power supply. Designed to switch instantly between the public grid and a backup source (generator, solar inverter or batteries), it protects your critical equipment from unexpected power cuts.





A complete "Plug & Protect" solution

This pre-equipped box combines components from leading brands for maximum reliability:

  • ONCCY EATS2 4P 63A automatic transfer switch: The heart of the system for seamless switching.
  • Schneider Resi9 4P 63A (300 mA) residual current device: Comprehensive protection against insulation faults and current leakage.
  • 2x Schneider Resi9 4P 25A C-curve circuit breakers: Robust protection against overloads and short circuits.
  • 3x 16A IP44 sockets: Direct and secure output points for your devices.





ONCCY EATS2 automatic inverter (< 50 ms)

The inverter ensuresalmost instantaneous continuity of service. In the event of a power failure, it switches to your backup source in less than 50 milliseconds.

  • Zero interruption: Your servers, freezers, medical or home automation systems will not shut down.
  • Total security: Strict physical isolation prevents any current from flowing back from the backup source to the public grid (anti-return).
  • Manual/Auto mode: Option to force the source via a switch on the front panel.





Schneider Electric Resi9 protection

By incorporating the Resi9 range, this box focuses on professional quality.

  • 25A circuit breakers: Sized to handle the load calls when your machines start up.
  • 300 mA residual current device: Ideal for tertiary or photovoltaic installations, preventing false trips while ensuring fire and machine protection.





Integrated IP44 power sockets

Practical and secure, these three sockets feature a protective cover, an earth pin, screw terminals and child protection. Splash-proof (IP44), they allow you to connect several devices safely and are ideal for damp or demanding environments.





Ideal applications

  • Hybrid photovoltaic: Automatic switchover to batteries in the event of an unstable grid.
  • Generators: Automated energy transfer without manual intervention.
  • Tertiary & Offices: Protection of computer racks and security systems.
  • Remote areas: Intelligent management between multiple energy sources.





💡 Wattuneed tip: Always combine the automatic inverter with suitable residual current devices and circuit breakers to ensure a safe and optimal installation, especially in hybrid photovoltaic systems or those with a generator.





Wiring & Installation

Connecting your inverter box is a key step. To ensure a smooth transition between your energy sources, carefully follow the installation plan provided.

schéma câblage Coffret inverseur triphasé 400V 16A avec prise





Three-phase Source Switch Specifications
Nominal Voltage 400V AC (Three-phase + Neutral)
Maximum Current 16A (expandable depending on internal wiring)
Switching Speed < 50 ms
Protection rating of sockets IP44 (protective cover)
Mechanical service life > 8,000 cycles
Compliance CE standards, standard DIN rail mounting





FAQ - 400V 16A Three-Phase Inverter Box

1. What protection components are included in this box? +
This complete box includes an ONCCY EATS2 automatic transfer switch (4P 63A), a Resi9 residual current device (4P 63A - 300 mA), two Resi9 modular circuit breakers (4P 25A 400V) and three 16A sockets. This set guarantees optimal protection against overloads and current leaks.
2. How does the automatic inverter work in the event of a power cut? +
The ONCCY EATS2 inverter detects the loss of voltage and automatically switches between the main grid and your backup source (inverter, battery or generator) in less than 50 milliseconds, ensuring a continuous, uninterrupted power supply for your equipment.
3. Why use a 300 mA residual current device on this installation? +
The 4P 63A residual current device with a sensitivity of 300 mA protects people and equipment against insulation faults, while avoiding frequent false trips on high-power three-phase installations.
4. What is the role of Resi9 4P 25A circuit breakers? +
They protect three-phase circuits against overloads and short circuits. Their C curve is specifically designed to provide reliable protection and ensure the integrity of your wiring and appliances.
5. What are the characteristics of the three integrated sockets? +
The box has 3 16A sockets with earth pin, child protection and waterproof cover (IP44). They are ideal for use in technical rooms or damp environments.
6. Where can this three-phase box be installed? +
It is designed for indoor DIN rail mounting in dry or protected damp locations. Its robust design allows for neat integration into your electrical panel.
7. Is it compatible with a hybrid photovoltaic inverter? +
Absolutely. This box is ideal for hybrid systems, UPSs and generators, ensuring a smooth transition and continuity of power supply in the event of a mains failure.
8. Is the box delivered ready for installation? +
Yes, it is delivered ready to be assembled.

Specific References

Three-Phase Reversing Switch Box 400V 16A with Socket

Three-Phase Reversing Switch Box 400V 16A with Socket by Wattuneed.