Legrand DNX 4500 Circuit Breaker User Manual

1. Introduction

This manual provides essential information for the safe and effective installation, operation, and maintenance of your Legrand DNX 4500 Circuit Breaker. This device is designed for the protection of your electrical installation, ensuring safety and reliability. Please read this manual thoroughly before proceeding with any installation or operation.

The Legrand DNX 4500 is a Uni + Neutral 230 V circuit breaker with a 4.5 kA breaking capacity, suitable for various electrical panel applications. It is compatible with Legrand Drivia electrical panels and horizontal combs, conforming to the NF EN 60898-1 standard.

2. Safety Information

WARNING: Electrical work should only be performed by qualified and authorized personnel. Failure to follow these safety instructions can result in electric shock, fire, serious injury, or death.

• Always disconnect power at the main service panel before installing, servicing, or removing the circuit breaker.
• Use appropriate personal protective equipment (PPE), such as insulated gloves and safety glasses.
• Ensure all wiring connections are secure and comply with local and national electrical codes.
• Do not use the circuit breaker if it appears damaged.
• Verify the voltage and current ratings of the circuit breaker match your application requirements.
• This device is designed for indoor use in dry locations unless otherwise specified.

3. Product Overview

The Legrand DNX 4500 Circuit Breaker (Model LEG406773) is a miniature circuit breaker designed for overcurrent protection in electrical circuits. Key features include:

• Uni + Neutral 230 V: Designed for single-phase circuits with neutral.
• DNX² 4500 - 4.5 kA: Indicates a breaking capacity of 4.5 kiloamperes.
• Current Rating: 10 Amps.
• Connection Types: Supports screw/screw and car/car connections for versatile installation.
• Feed Controls: Integrated controls for managing power flow.
• Compatibility: Compatible with Legrand Drivia electrical panels and horizontal combs.
• Certification: Conforms to NF EN 60898-1 standard.

Figure 1: Front view of the Legrand DNX 4500 Circuit Breaker. This image shows the grey casing, the toggle switch for operation, and the branding.

4. Setup and Installation

Installation of the Legrand DNX 4500 Circuit Breaker must be performed by a qualified electrician in accordance with all applicable electrical codes and standards.

1. Power Disconnection: Before beginning any work, ensure that the main power supply to the electrical panel is completely disconnected and locked out.
2. Mounting: The circuit breaker is designed for panel mounting. Securely attach the breaker to the DIN rail within the electrical panel.
3. Wiring Connections:
   • Connect the incoming phase (Uni) and neutral (N) wires to the designated terminals.
   • Connect the outgoing load wires to the corresponding terminals.
   • Ensure all screw terminals are tightened to the manufacturer's specified torque to prevent loose connections and overheating.
   • The circuit breaker supports both screw/screw and car/car connection types.
4. Compatibility Check: Ensure compatibility with Legrand Drivia electrical panels and horizontal combs for proper integration.
5. Verification: After installation, double-check all connections and ensure the breaker is securely mounted.
6. Power Restoration: Once installation is complete and verified, restore power to the main service panel.

5. Operating Instructions

The Legrand DNX 4500 Circuit Breaker operates as a protective device for your electrical circuits.

• ON Position: To energize the circuit, push the toggle switch to the "ON" position (typically upwards).
• OFF Position: To de-energize the circuit, push the toggle switch to the "OFF" position (typically downwards).
• Tripped Position: If an overcurrent or short circuit occurs, the circuit breaker will automatically trip to an intermediate position (often center or fully down, depending on the model) to protect the circuit.
• Resetting a Tripped Breaker:
  1. First, identify and correct the cause of the trip (e.g., unplug overloaded appliances, fix short circuits).
  2. Push the toggle switch firmly to the "OFF" position.
  3. Then, push the toggle switch to the "ON" position to restore power.
  4. If the breaker trips immediately again, do not attempt to reset it repeatedly. Consult a qualified electrician.

6. Maintenance

The Legrand DNX 4500 Circuit Breaker is designed for long-term, reliable operation with minimal maintenance. However, periodic checks are recommended:

• Visual Inspection: Periodically inspect the circuit breaker for any signs of physical damage, discoloration, or loose connections.
• Cleaning: Keep the area around the circuit breaker clean and free from dust and debris. Use a dry, soft cloth for cleaning; never use liquids.
• Professional Inspection: It is advisable to have your electrical system, including circuit breakers, inspected by a qualified electrician periodically (e.g., every 5-10 years) to ensure continued safe operation.
• Do Not Tamper: Never attempt to open or repair the circuit breaker yourself. Refer all servicing to qualified personnel.

7. Troubleshooting

If you encounter issues with your Legrand DNX 4500 Circuit Breaker, consider the following common scenarios:

• Breaker Trips Frequently:
  • Overload: The circuit may be drawing too much current. Unplug some devices from the circuit.
  • Short Circuit: A direct connection between live and neutral/ground wires. This requires immediate investigation by an electrician.
  • Faulty Appliance: An appliance connected to the circuit may be defective. Try isolating appliances to identify the culprit.
• Breaker Does Not Reset:
  • Ensure the cause of the trip has been resolved.
  • Push the switch firmly to the "OFF" position before attempting to reset to "ON".
  • If it still doesn't reset, the breaker itself might be faulty, or there's a persistent fault in the circuit. Do not force it; consult an electrician.
• No Power to Circuit (Breaker ON):
  • Check if other breakers in the panel are tripped.
  • Verify main power supply to the panel.
  • Inspect wiring connections for looseness or damage (with power off).
  • If all checks fail, the breaker may be defective.

For persistent issues or if you are unsure, always contact a qualified electrician.

8. Specifications

9. Warranty and Support

Legrand products are manufactured to high-quality standards. For specific warranty information, please refer to the documentation provided with your purchase or visit the official Legrand website.

For technical support, product inquiries, or assistance with installation, please contact Legrand customer service or your local authorized distributor. Contact information can typically be found on the official Legrand website: www.legrand.com