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Legrand LEXIC Circuit Breaker - TX3

Legrand LEXIC Circuit Breaker - TX3

The Legrand TX3 circuit breaker is designed for reliable electrical protection. It can be connecte...

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Legrand 403357 Circuit Breaker 1-Pin 16A 230/400V 6kA IEC Certified

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Product Information

Full details

The Legrand TX3 circuit breaker is for electricians and system installers needing reliable overcurrent protection. Its key benefit is robust performance meeting IEC 60947-2 standards with a 6 kA breaking capacity. A notable caveat is its incompatibility with ground fault elements. This miniature circuit breaker offers dependable electrical safety and is compatible with DX3 auxiliary contacts.

All features

SeriesTX3
Model Part Number403418
BrandLegrand

Extended Product Information

FAQs

What is the short circuit breaking capacity of the Legrand TX3 circuit breaker?

The Legrand TX3 circuit breaker has a short circuit breaking capacity of 6 kA, meeting IEC 60947-2 standards.

Can I add a ground fault module to this circuit breaker?

No, the Legrand TX3 circuit breaker cannot be equipped with ground fault elements.

What types of terminal connections does it support?

It supports connection using either pin or fork terminal rails.

Is this circuit breaker compatible with other Legrand accessory modules?

It is compatible with Legrand DX3 auxiliary contacts.

What is the rated current and voltage for this model?

This specific model has a rated current of 20 A and a rated voltage of 400 V (compatible with input voltages from 240-415 V).

What does the IP20 rating mean?

The IP20 rating signifies that the device is protected against solid objects larger than 12.5 mm (like fingers) and offers no protection against water ingress. It is suitable for indoor, dry installations.

What is the significance of 'Type B' for this circuit breaker?

Type B circuit breakers trip between 3 to 5 times the rated current, making them suitable for circuits where rapid response to overcurrents is needed, such as lighting or general circuits with minimal inrush current.

Troubleshooting

Circuit breaker trips frequently

Check for overloaded circuits or short circuits. Inspect connected appliances and wiring for faults. Ensure the breaker's rated current is appropriate for the circuit's load.

Breaker will not reset after tripping

Ensure the fault that caused the trip has been resolved. If the issue persists, the breaker may be damaged and require replacement.

No power to the circuit after resetting

Verify that the breaker is receiving power. Check all downstream connections and wiring for breaks or faults.

Loose terminal connections

Turn off power to the breaker. Use a screwdriver to tighten the terminal screws. Do not overtighten.

Pros and Cons

Pros

  • Meets high safety standards with 6 kA breaking capacity.
  • Flexible installation with pin or fork terminal rail options.
  • Compatible with Legrand DX3 auxiliary contacts for expanded functionality.
  • Durable construction for reliable long-term use.
  • Type B tripping offers fast response for specific circuit protection needs.

Cons

  • Cannot be equipped with ground fault elements.
  • Specific compatibility is limited to DX3 auxiliary contacts.
  • IP20 rating means it's suitable for indoor, dry environments only.
  • Requires DIN-rail installation, limiting mounting options.

Setup, Compatibility & Care

Setup:

  1. Mounting: Securely mount the circuit breaker onto a standard 35mm DIN-rail within an appropriate enclosure.
  2. Wiring: Connect the incoming power supply to the line terminals and the outgoing circuit to the load terminals. Ensure correct polarity for DC applications if applicable, though primarily designed for AC.
  3. Terminal Connections: Utilize either the pin terminal rail or the fork terminal rail option for connecting the power source. Ensure connections are tight and secure to prevent overheating.
  4. Auxiliary Contacts: If required, attach Legrand DX3 auxiliary contacts to the designated side of the breaker following the auxiliary contact's specific instructions.

Compatibility:

  • Auxiliary Contacts: Compatible with Legrand DX3 series auxiliary contacts only.
  • Terminal Rails: Supports both pin and fork type terminal connection methods.
  • Electrical Systems: Suitable for AC systems with input voltages ranging from 240-415 V and frequencies of 50-60 Hz.
  • Limitations: Not compatible with ground fault elements.

Care:

  • Environment: Keep the circuit breaker in a dry, dust-free environment. The IP20 rating indicates protection against solid objects larger than 12.5mm but not against water.
  • Cleaning: Disconnect power before cleaning. Use a dry cloth to wipe down the exterior. Avoid using solvents or wet cloths, which could damage the unit or compromise safety.
  • Inspection: Periodically inspect the breaker and terminal connections for any signs of wear, damage, or overheating. Ensure all connections remain tight.

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