EATON INDUSTRIES Miniature Circuit Breaker - FAZ-B25/2

Two-pole miniature circuit breaker designed for industrial and advanced commercial applications. F...

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Tameson UKEaton Industries Eaton Faz 2A Single Pole Mcb B Curve 15Ka - 278523
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eBayEaton FAZ-C40/1 278565 15kA 1-Pole Circuit Breaker
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Product Information

Full details

This guide is for industrial and advanced commercial users requiring reliable circuit protection. The EATON INDUSTRIES FAZ-B25/2 Miniature Circuit Breaker offers a robust solution with a B tripping characteristic and high breaking capacity, ensuring safety and operational integrity. A potential consideration is its specialized B tripping curve, which may not be suitable for all applications without proper system design.

All features

SeriesFAZ-B
Model Part Number278736
BrandEATON INDUSTRIES

Extended Product Information

FAQs

What is the significance of the 'B' tripping characteristic?

The 'B' tripping characteristic indicates that the breaker will trip between 3 to 5 times its rated current. This makes it sensitive and suitable for circuits with low inrush currents, such as lighting and control circuits.

Can this breaker be used in a residential setting?

While technically compliant with some standards, the B tripping characteristic is generally not recommended for typical residential applications where appliances often have higher inrush currents. C or D tripping characteristics are more common for residential use.

What does a 15kA breaking capacity mean?

A 15kA breaking capacity means the circuit breaker can safely interrupt a short-circuit current of up to 15,000 amperes without sustaining damage. This is crucial for protecting electrical systems from severe fault conditions.

How do I determine if this 25A breaker is suitable for my application?

You need to calculate the continuous load current of your circuit. If it consistently draws up to 25A and has low inrush current, this breaker is suitable. Consult an electrician or electrical engineer for confirmation.

What are remote control modules used for with this breaker?

Remote control modules allow you to switch the circuit breaker ON or OFF remotely via a control signal, which is useful for automation systems, energy management, or remote monitoring.

Is this breaker compatible with other brands' DIN rails?

The breaker is designed for standard IEC/EN compliant DIN rails, which are widely used across manufacturers. However, always check precise dimensions and fitting if using non-EATON rails for certainty.

Troubleshooting

Breaker trips frequently under normal load.

Verify the load current does not exceed the 25A rating. Check for any faulty appliances or wiring. Ensure the B tripping characteristic is appropriate for the connected load; high inrush currents may require a different curve (e.g., C).

Breaker will not reset after tripping.

Ensure the fault that caused the trip has been cleared. If the breaker is damaged or has reached its operational limit, it may need replacement.

Loose connections at terminals.

De-energize the circuit. Re-tighten terminal screws firmly to ensure a secure connection. Loose connections can cause overheating and potential failure.

Pros and Cons

Pros

  • High breaking capacity provides robust protection against severe faults.
  • B tripping characteristic is suitable for sensitive applications.
  • Designed for industrial and advanced commercial use, ensuring reliability.
  • Compliant with international safety standards (IEC/EN 60898).
  • Supports integration with remote control modules for automation.

Cons

  • B tripping characteristic may trip too readily on circuits with high inrush currents.
  • Requires specific knowledge for proper selection based on application type.
  • Not designed for residential applications where other tripping curves might be more appropriate.
  • Installation requires qualified personnel familiar with electrical safety standards.

Setup, Compatibility & Care

Setup:

  1. Ensure the power to the circuit is completely de-energized before installation.
  2. Mount the circuit breaker onto a standard DIN rail within the electrical enclosure using its integrated clips.
  3. Connect the line and load conductors to the appropriate terminals, ensuring correct polarity and secure connections.
  4. If using remote control modules, follow the specific wiring instructions for those modules.

Compatibility:

  • Compatible with standard IEC/EN compliant DIN mounting rails.
  • Can be integrated with EATON's range of remote control modules (ensure model compatibility).
  • Suitable for use in industrial and advanced commercial distribution boards.

Care:

  • Regular visual inspection for any signs of damage or overheating.
  • Keep the enclosure clean and free from dust and moisture.
  • Periodic testing, as per local electrical codes and standards, is recommended for critical applications.

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