Introduction – Schneider MasterPact NW40N2 Power Circuit Breaker

The Schneider MasterPact NW series is designed for low-voltage electrical distribution systems requiring reliable circuit protection and switching performance. These air circuit breakers help protect electrical circuits and connected equipment against overloads and short circuits when equipped with the appropriate trip unit.

The NW40 frame is intended for high-capacity distribution applications. Its selection requires careful consideration of electrical ratings, interrupting performance, installation arrangement, and compatibility with the existing switchboard.

For the NW40N2 reference, buyers should verify the exact model designation before purchasing. Schneider's published MasterPact NW selection information identifies several NW40 performance configurations, but the N2 suffix should not be assumed to be a standard catalog option without confirmation.

Technical Specifications – Product Data and Dimensions

Parameter	Specification
Brand	Schneider Electric
Product Series	MasterPact NW
Model Reference	NW40N2
Product Type	Air Circuit Breaker
Frame Class	NW40 (4000 A)
Dimensions (H × W × D)	352 × 537 × 297 mm
Weight	80 kg (176.37 lb)
Application	Low-voltage power distribution and circuit protection

Dimensions and weight are based on the supplied product information. The supplied dimensions correspond to a fixed four-pole installation in published MasterPact NW dimensional data. Confirm the exact model reference and configuration against the nameplate before ordering.

Recommended Related Models – Schneider MasterPact NW40 Range

The following NW40 variants are useful for comparing different interrupting-performance configurations.

Model	Product Type	Performance Category
NW40H1	Air Circuit Breaker	H1
NW40H2	Air Circuit Breaker	H2
NW40H3	Air Circuit Breaker	H3

These variants have different electrical performance characteristics. Selection should be based on rated voltage and the prospective short-circuit current at the installation point.

Popular Related Models – MasterPact NW Circuit Breakers

NW40H1 – A 4000 A frame circuit breaker for high-capacity power distribution.
NW40H2 – An NW40 configuration with a different interrupting-performance category.
NW40H3 – An NW40 option for installations requiring a different short-circuit performance level.
NW32H2 – A related 3200 A frame circuit breaker for comparatively lower-current distribution systems.
NW25H2 – A 2500 A frame option for applications with lower rated-current requirements.

The H1, H2, and H3 versions have different interrupting capabilities and should not be treated as interchangeable. Always verify the complete catalog number, electrical ratings, trip-unit functions, pole arrangement, and mounting configuration before replacement or purchase.

Applications – High-Capacity Power Distribution

The Schneider MasterPact NW40 series is designed for demanding low-voltage power distribution applications. It is used in industrial facilities, commercial buildings, and infrastructure projects where dependable circuit protection and reliable electrical switching are essential.

Typical application areas include:

Main low-voltage distribution switchboards
Industrial manufacturing facilities
Large commercial electrical installations
Power distribution centers
Infrastructure and utility power systems
Electrical networks requiring coordinated overload and short-circuit protection

The correct breaker configuration should be selected according to system voltage, rated current, prospective fault current, and protection coordination requirements.

Advantages – Protection and Electrical System Integration

High-current capability: The MasterPact NW40 platform is designed for high-capacity power distribution.
Overload protection: Compatible electronic trip units provide adjustable protection against sustained overcurrent.
Short-circuit protection: The appropriate breaker configuration can interrupt fault currents within its specified breaking capacity.
Installation flexibility: Different mounting and connection arrangements are available within the MasterPact NW family.
Protection coordination: Adjustable trip characteristics help coordinate protection throughout the electrical distribution network.
Accessory compatibility: Applicable configurations support auxiliary contacts, operating mechanisms, and control accessories.

Technical FAQs – Selection, Operation and Maintenance

Q1: What is the Schneider NW40N2 used for?

It is supplied as a MasterPact NW40 circuit-breaker reference for low-voltage power distribution. The complete catalog number should be verified before ordering.

Q2: What does the NW40 designation represent?

NW40 identifies the 4000 A frame class in the MasterPact NW family.

Q3: Is NW40N2 an officially listed Schneider model?

The exact NW40N2 designation should be checked against Schneider Electric's catalog and the product nameplate. Do not assume that the N2 suffix represents a standard orderable configuration.

Q4: What protection functions are available?

Depending on the installed trip unit, MasterPact NW circuit breakers can provide long-time, short-time, instantaneous, and other protection functions.

Q5: Can the NW40 series interrupt short-circuit currents?

Yes. The selected breaker must have a suitable breaking capacity for the system's operating voltage and prospective fault current.

Q6: How should the trip unit be selected?

Consider rated current, sensor rating, protection functions, adjustable settings, and coordination requirements. The trip unit must be compatible with the specific breaker.

Q7: Is the NW40 available in fixed and drawout configurations?

The MasterPact NW family includes different installation arrangements. Confirm the exact construction of the individual unit before selecting accessories or planning installation.

Q8: Can the breaker support remote operation?

Remote operation depends on the installed operating mechanism and compatible control accessories. Confirm the required configuration before installation.

Q9: What maintenance checks are recommended?

Follow the manufacturer's maintenance instructions. Typical inspections include electrical connections, contact condition, operating mechanisms, trip-unit functions, and auxiliary circuits.

Q10: What should be checked before replacing an existing NW40 breaker?

Verify the complete catalog reference, rated current, operating voltage, breaking capacity, pole arrangement, mounting construction, terminal connections, trip unit, and accessories.

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