The Merlin Gerin M10 N1 Masterpact Air Circuit Breaker is a premium circuit protection device from the renowned Schneider Electric Masterpact family, one of the most respected names in low-voltage power distribution. Rated at 1000A with comprehensive protection features including shunt trip and closing release mechanisms, this ACB is engineered for critical power distribution applications where selective protection and operational reliability are essential. Auto2mation is proud to offer this used Masterpact breaker to industrial and marine clients seeking Schneider Electric quality at exceptional value.

The Masterpact series has set the global standard for air circuit breaker performance since its introduction, combining innovative mechanical design with advanced electronic protection systems. The M10 N1 represents a versatile mid-range option within the Masterpact lineup, delivering 1000A of continuous current capacity with 40 kA interrupting capability. The integrated STR 58U trip unit provides precise over-current protection with adjustable settings, while the Mx-A shunt trip and XF-E closing release enable remote operation and integration into automated control schemes. These features make the M10 N1 equally suitable for main switchgear protection, generator circuit protection, and large motor feeder applications.

Key Features & Specifications

The Merlin Gerin M10 N1 Masterpact incorporates design innovations that have made the Masterpact series the preferred choice of electrical engineers specifying protection for critical infrastructure worldwide.

• Rated Current (In): 1000A (3 x 1000A) continuous capacity
• Insulation Voltage (Ui): 1000V at 50/60 Hz
• Operational Voltage (Ue): 380/440V and 480/690V
• Breaking Capacity (Icu/Ics): 40 kA
• Short-Time Withstand (Icw): 40 kA for 0.5 seconds
• Trip Unit: STR 58 U electronic protection
• Shunt Trip: Mx-A for remote tripping capability
• Closing Release: XF-E for electrical closing operation
• Utilization Category: Category B for selective coordination
• Standard: IEC 947-2 compliant
• Control Voltages: IEC 220/250V AC (50/60Hz), 200/220V DC, JIS/JEC 200/250V AC

Technical Specifications

Specification	Details
Product Name	Merlin Gerin M10 N1 Masterpact Air Circuit Breaker
Product Line	Masterpact
Manufacturer	Merlin Gerin (Schneider Electric)
Type	Air Circuit Breaker
Rated Current (In)	1000A (3 x 1000A)
Insulation Voltage (Ui)	1000V ~ 50/60 Hz
Operational Voltage (Ue)	380/440V, 480/690V
Breaking Capacity	40 kA (Icu/Ics)
Short-Time Withstand (Icw)	40 kA / 0.5s
Trip Unit	STR 58 U
Shunt Trip	Mx-A
Closing Release	XF-E
Control Voltage AC	IEC 220/250V AC (50/60Hz), JIS/JEC 200/250V AC
Control Voltage DC	200/220V DC
Standard	IEC 947-2
Utilization Category	Category B

Applications & Use Cases

The Merlin Gerin M10 N1 Masterpact Air Circuit Breaker is deployed across a wide range of industrial, commercial, and marine applications where reliable circuit protection is fundamental to operational safety and continuity. In industrial manufacturing facilities, the M10 N1 serves as the main incoming breaker for low-voltage switchgear, protecting transformers and distribution busbars from fault damage. The 1000A rating is ideally suited for medium-to-large industrial sites with substantial power demands.

Marine electrical systems extensively utilize Masterpact breakers for generator protection, main switchboard incoming feeders, and large motor starting circuits. The Mx-A shunt trip enables integration with ship-wide safety systems, allowing remote tripping from the bridge or engine control room during emergency conditions. The robust mechanical construction withstands the vibration, humidity, and temperature cycling characteristic of marine environments.

In commercial building infrastructure including hospitals, data centers, and shopping complexes, the M10 N1 provides the selective coordination capability required to limit outage scope during fault events. The STR 58U trip unit's adjustable settings enable protection engineers to achieve precise coordination with downstream devices, maintaining power to critical loads even when faults occur on non-essential circuits.

Why Choose the Merlin Gerin M10 N1 Masterpact

The Masterpact name has been synonymous with air circuit breaker excellence for decades, and the M10 N1 continues this tradition of engineering superiority. Schneider Electric's continuous investment in research and development ensures that Masterpact breakers incorporate the latest advances in protection technology, materials science, and manufacturing precision. The STR 58U trip unit delivers protection accuracy that minimizes nuisance tripping while ensuring rapid fault clearance when genuine fault conditions occur.

Auto2mation complements Schneider Electric's product excellence with our dedicated customer service, 30-day warranty protection, and free worldwide shipping. Our team has extensive experience with Masterpact breakers and can provide guidance on selection, installation, and maintenance to maximize the operational life of your investment.

Compatibility & Integration

The M10 N1 Masterpact is designed for installation in Schneider Electric (Merlin Gerin) Okken, Blokset, and Prisma switchgear systems, as well as third-party switchboards meeting IEC 947-2 dimensional requirements. The multiple control voltage options (AC and DC) accommodate a wide range of control system designs, from traditional relay logic to modern PLC-based automation schemes. When retrofitting this breaker, verify compatibility of the cradle dimensions, busbar connections, and arc chute clearance requirements with your existing switchgear configuration.

Maintenance & Support

Masterpact breakers are designed for long service life with moderate maintenance requirements. Recommended procedures include periodic contact inspection and dressing, mechanism lubrication, trip unit calibration verification, and cleaning of arc chutes. The modular design of the STR 58U trip unit allows field replacement if necessary. Auto2mation supports your maintenance activities with our 30-day warranty, technical consultation, and access to Schneider Electric documentation.

Frequently Asked Questions

Q1: What is the rated current of the M10 N1 Masterpact?

The M10 N1 has a rated current of 1000A (3 x 1000A for three-pole configuration), suitable for medium-to-large industrial power distribution systems.

Q2: What is the breaking capacity of this breaker?

The M10 N1 offers 40 kA breaking capacity (Icu = Ics = 40 kA) with a short-time withstand rating of 40 kA for 0.5 seconds.

Q3: What trip unit is included?

The breaker includes the STR 58U electronic trip unit with adjustable over-current protection settings for precise coordination.

Q4: What control accessories are fitted?

The M10 N1 is equipped with an Mx-A shunt trip for remote tripping and an XF-E closing release for electrical closing operation.

Q5: What control voltages are supported?

The control circuits support IEC 220/250V AC (50/60Hz), JIS/JEC 200/250V AC (50/60Hz), and 200/220V DC.

Q6: What warranty does Auto2mation provide?

Auto2mation provides a 30-day warranty on this used Merlin Gerin M10 N1 with free shipping on all orders.

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