Eaton Circuit Breaker - 3 Pole 100A - NZMB1-A100 - 259079

The Eaton Industries NZMB A is a 3-pole circuit-breaker with a rated current and uninterrupted cur...

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Tameson UKEaton Industries Eaton Circuit Breaker 3 Pole 100A Nzmb1-A100 - 259079
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eBayEATON NZMB1-A100 PANELBOARD MCCB 100A 100 AMP 3P 415V 25kA MEMSHIELD 3 NZM1
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Product Information

Full details

This guide is for electricians and system integrators working with industrial electrical systems. The Eaton NZMB1-A100 circuit breaker offers robust system and cable protection with a high breaking capacity. A key consideration is its fixed installation type, requiring specific mounting procedures.

All features

SeriesNZM1
Model Part Number259079
BrandEaton

Extended Product Information

FAQs

What is the breaking capacity of the Eaton NZMB1-A100?

The breaking capacity is 25kA at 400/415V, 50Hz.

What is the adjustable range for overload protection?

The overloading protection setting range is 80A to 100A.

What type of installation is this circuit breaker designed for?

It is designed as a built-in device for fixed installation.

Does this circuit breaker have auxiliary contacts?

No, the Eaton NZMB1-A100 does not come with auxiliary contacts.

What is the IP rating of this device?

The International Protection (IP) code is IP20, offering protection against solid objects larger than 12.5mm.

Can this circuit breaker be mounted on a DIN rail?

DIN rail mounting is optional and may require a specific mounting kit.

What is the operating temperature range?

The operating temperature range is -25°C to 70°C.

Troubleshooting

Circuit breaker trips frequently under normal load.

Check if the load exceeds the rated current (100A). Verify the overload protection setting; it may be set too low. Inspect connected cables for damage or improper connections.

Circuit breaker does not reset after tripping.

Ensure the cause of the trip (overload or short circuit) has been cleared. Check for any physical obstruction preventing the lever from resetting. If the issue persists, the device may be damaged and require replacement.

Difficulty connecting wires to the box terminal.

Ensure the wire gauge is appropriate for the terminal size and the rated current. Loosen the terminal screws sufficiently before inserting the wire. Ensure the conductor is stripped to the correct length and inserted fully before tightening the screws securely.

Overheating at the terminals.

Check that the terminal screws are tightened to the manufacturer's recommended torque. Ensure the wire size is adequate for the current. Inspect terminals for corrosion or damage.

Pros and Cons

Pros

  • High breaking capacity for robust fault protection.
  • Adjustable settings for overload and short-circuit protection allow customization.
  • Designed for system and cable protection, enhancing equipment longevity.
  • Durable construction suitable for industrial environments.
  • 3-pole design simplifies wiring for three-phase systems.

Cons

  • Fixed installation type requires dedicated mounting, not plug-and-play.
  • IP20 rating offers basic protection against solid objects, not liquids.
  • Auxiliary contacts are not included, limiting remote monitoring capabilities.
  • Requires specific knowledge for setting adjustment ranges.

Setup, Compatibility & Care

Setup:

The NZMB1-A100 is a built-in device designed for fixed installation. Ensure the unit is de-energized before installation. Connect the main conductors to the box terminals. For DIN rail mounting, an optional mounting kit may be required. Consult the manufacturer's installation manual for detailed wiring diagrams and mounting instructions.

Compatibility:

  • Voltage: Compatible with systems operating at nominal voltages up to 440V.
  • Current: Rated for 100A continuous current.
  • Standards: Meets IEC/EN 60947 standards.
  • Environment: Suitable for industrial environments with a Pollution Degree of 3. Operating temperature range is -25°C to 70°C.

Care:

  • Cleaning: Keep the circuit breaker clean and free from dust and debris. Use a dry or slightly damp cloth for cleaning. Avoid using solvents or abrasive cleaners.
  • Inspection: Periodically inspect the terminals for tightness and signs of corrosion. Ensure ventilation around the unit is clear.
  • Testing: For critical applications, periodic functional testing by a qualified electrician is recommended to ensure proper operation.

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