Legrand Circuit Breakers

Introduction to Legrand circuit breakers

The Legrand brand is a benchmark in French electrical equipment. Its electrical circuit breakers combine technological innovation and proven reliability. These automatic devices guarantee the safety of your electrical installation. Legrand circuit breakers ensure automatic shutdown when faults are detected. The DNX³ series perfectly illustrates this expertise, which is recognised by professional electricians. These protective devices meet the most stringent requirements.

Types of circuit breakers

Legrand connection circuit breakers

Legrand connection circuit breakers provide the main protection for your electrical installation. Also known as subscriber circuit breakers, they are installed downstream of the Linky meter. Installing them in the building's service duct ensures optimal protection. These devices prevent the risk of overloads and short circuits caused by excessive consumption.

Our range includes two-pole and four-pole models suitable for all your projects. Two-pole circuit breakers are suitable for single-phase residential installations. Four-pole circuit breakers are ideal for three-phase networks for professional use. The 500mA differential versions offer increased protection against electrical risks.

These circuit breakers are available in several currents: 30A, 45A, 60A and 90A. This diversity adapts to the power required by your electrical installation. The flagship BACO low-voltage bipolar model is suitable for blue tariffs from 3kVA to 36kVA. This range is an advantageous replacement for the old general protection system. Its four-pole version perfectly complements our range of Legrand circuit breakers.

DNX³ thermal magnetic circuit breakers

Legrand's DNX³ thermal magnetic circuit breakers use dual protection technology. The magnetic system reacts instantly to short circuits. Automatic tripping occurs in less than 20 milliseconds. This speed protects your electrical installation against serious faults. These professional devices guarantee optimum reliability.

The thermal mechanism protects against prolonged overloads. A sensitive bimetal strip gradually deforms under the effect of heat. Tripping occurs between 30 seconds and several minutes. The speed of intervention is determined by the intensity of the overload.

The DNX³ series from Legrand offers a compact and high-performance module. These neutral phase circuit breakers provide reliable protection up to 63 amps. Their modular design facilitates installation in electrical panels. The connection comb connection optimises electrical distribution. The price of this product remains very competitive on our product page. What's more, the DNX³ range, like all our other electrical products in stock, benefits from express delivery within 24/48 hours.

DX³ residual current circuit breakers

Legrand DX³ residual current circuit breakers combine magnetothermal protection and leakage detection. These innovative devices replace the traditional combination of a residual current switch and a branch circuit breaker. This two-in-one solution optimises space in your electrical panel. It also reduces the overall cost of your electrical installation. Our products in this range are available for express delivery.

The differential system detects current leakage to earth. The sensitivity of 30 milliamps provides effective protection for people. This function prevents the risk of electrocution through indirect contact. The circuit is tripped within milliseconds of a fault being detected.

The DX³ range offers residual current circuit breakers for demanding applications. These four-pole models can handle high currents while maintaining optimal protection. Their robustness makes them suitable for professional and tertiary environments. Each circuit is individually protected for maximum safety. Each DX³ reference has excellent customer reviews and is always in stock. These high-end products provide effective multi-pole protection.

Technical characteristics of circuit breakers

Legrand electrical circuit breakers are available with several essential technical parameters. The rating determines the nominal current supported during normal operation. Values range from 2 to 63 amps for domestic applications. Various models are available on One-Elec to suit your specific needs. These modular devices can be adapted to all types of electrical configurations.

C curve and tripping

The tripping curve is a fundamental selection criterion. The C curve is mainly used in residential installations with optimal tripping. This feature is ideal for standard lighting circuits and sockets. Tripping occurs between 5 and 10 times the rated current.

The breaking capacity indicates the maximum interruption capacity during a short circuit. Legrand circuit breakers offer capacities from 3000 to 10,000 amps. This performance guarantees a safe cut-off even in the event of major faults. Each electrical circuit therefore benefits from appropriate protection.

Screw terminals and circuit breaker connection in the electrical panel

Screw terminals facilitate the connection of conductors with optimal tightening. This proven technology ensures a durable and reliable connection over time. Compatible cable cross-sections vary depending on the model from 1.5 to 25 mm². Each terminal output guarantees perfect electrical contact.

The number of poles determines the conductors protected simultaneously. The single-pole version protects only the active phase. The two-pole model includes the neutral for complete protection. The four-pole type is suitable for three-phase installations with a distributed neutral in accordance with the standard. Each device can be adapted to the specific requirements of your electrical installation. The multi-pole configuration offers maximum versatility for all your projects.

Installing circuit breakers

The installation of a Legrand circuit breaker must comply with specific rules. The NF C 15-100 standard defines electrical safety requirements. The electrical panel must be accessible and correctly sized. Each electrical circuit requires protection appropriate to its function and cross-section.

Circuit breakers are installed in the building's service duct after the meter. Their strategic position protects your entire domestic electrical installation. The installation must comply with Enedis regulations to ensure full compliance. This configuration provides primary protection for all your electrical circuits.

It is mounted on a standard 35 mm wide DIN rail. The snap-in system allows for quick installation without special tools. The modular width facilitates the organisation and maintenance of the electrical installation. This design greatly simplifies subsequent interventions.

The connection of the conductors is carried out after the power supply has been switched off. The input terminals are connected to the upstream power supply via connection combs. The output terminals supply the circuit to be protected directly. This configuration ensures optimal protection for your electrical installation. The use of a professional comb guarantees a reliable and durable connection.

Checking that the connections are tight ensures optimal and safe operation. Loose connections can cause dangerous overheating and tripping. The recommended tightening torque is specified in the technical documentation for each reference.

The labelling of each circuit breaker facilitates the identification of circuits in the event of intervention. This identification is mandatory under current regulations. Clear markings prevent handling errors during maintenance operations.

Tips for choosing the right Legrand circuit breaker

The choice of a Legrand circuit breaker depends on the maximum current of the circuit to be protected. This value is calculated based on the conductor cross-section and the connected power. Undersized protection causes tripping. Oversizing compromises the safety of your electrical installation.

For connection circuit breakers, the current depends on the power contracted with your supplier. Domestic installations generally use sizes from 30A to 60A. Industrial applications may require connection circuit breakers up to 90A. This adaptation ensures protection in accordance with the requirements of your contract.

The nature of the load directly influences the type of curve required. Resistive circuits such as heating are perfectly suited to the standard C curve. Motors and transformers require a D curve to withstand current inrushes. This adaptation ensures optimal operation without tripping.

The installation environment determines the choice of the appropriate model.

Damp or dusty premises require reinforced protection with high ratings. The ambient temperature also affects performance and service life. Each Legrand circuit breaker is adapted to specific environmental constraints. Compatibility with existing accessories deserves special attention. The connection combs, fault indicators and trippers must match the range.

This consistency facilitates installation and ensures optimal operation. It also simplifies the maintenance of your electrical panel. Each professional device ensures a reliable connection between the various circuits.

The available budget determines the most suitable products without compromising safety. The DNX³ range offers excellent value for money for common residential applications. More demanding projects justify investing in the premium DX³ series. Every Legrand circuit breaker guarantees reliable and long-lasting protection.

The predictable evolution of the installation guides you towards the right size. The future addition of electrical equipment may require greater protection. Anticipating this avoids costly modifications later on. Careful planning optimises your long-term investment.

In short, Legrand circuit breakers are a sustainable investment for your electrical installation. Their robust design and proven technology guarantee years of operation. Compliance with French and European standards ensures perfect compatibility. Each Legrand circuit breaker offers optimal protection for your electrical circuits. Any questions? Please do not hesitate to contact our technical team, who will be happy to help.