Residual current circuit breaker EFI-4 AC 80/0.5 002065145

### Protection and safety in your electrical installation

A Residual Current Device (RCD) is a key element of every modern electrical installation, providing protection for people and equipment against the effects of electric shock and damage caused by short circuits and overloads. The EFI-4 AC 80/0.5 model is designed for reliable operation and easy installation, making it an ideal choice for both professional installers and end users. The device is intended for use in TN-S, TN-C-S, TT and IT networks where the neutral and earth conductors may be separated.

Functionality and technical parameters

The EFI-4 AC 80/0.5 RCD is characterized by a rated current of 80 A and a rated voltage of 400 V. Its AC technology means it responds to alternating differential currents, providing effective protection against dangerous situations. It has 4 poles and a rated differential current of 500 A. The short-circuit strength of 10 kA guarantees its stable operation even in the event of sudden overvoltages. Mounting is on a DIN rail, and the compact dimensions (width 4 modules, depth 68 mm) make installation easy even in limited space. The terminals allow connection of conductors with a cross-section from 1 to 25 mm², both solid and stranded.

Practical advantages for the installer and user

This RCD is not only compliance with safety standards, but also a number of practical solutions:

• High reliability: Careful execution and full automation of the production process guarantee long-lasting and trouble-free operation of the device.
• Easy status identification: The contact position indicator makes it easy to quickly assess the status of the RCD – whether it is on or off.
• Safety of use: Secured terminals minimize the risk of accidental contact with live parts.
• Installation flexibility: The possibility of using insulated busbars on the upper and lower terminals facilitates adaptation to different installation configurations.
• Expandability: Thanks to the possibility of mounting additional accessories (auxiliary contacts, release devices), the functionality of the RCD can be adapted to specific needs.
• Functionality testing: The "Test" button allows regular checking of the correct operation of the RCD, which increases the sense of security.
• Wide operating temperature range: The device retains its properties in the temperature range from -25°C to +55°C, allowing it to be used in various environmental conditions.
• Compliance with standards: Meets the safety requirements of IP20, providing protection against the ingress of solid objects larger than 12.5 mm.

Thanks to these features, the EFI-4 AC 80/0.5 RCD is a comprehensive solution for ensuring safety in every home or commercial building.