Schneider Electric MT25N1 Air Circuit Breaker

Product Details

MT25N1 Product Description

The Schneider Electric MT25N1 is a high-performance air circuit breaker engineered for seamless integration within the Masterpact MT low-voltage power distribution architecture. Designed to operate at the protection layer of industrial control systems, the MT25N1 delivers reliable overcurrent and short-circuit protection while maintaining full compatibility with Schneider's modular switchgear ecosystem. Its system-ready design ensures consistent performance across multi-tier control architectures — from the power layer through to the control, communication, and HMI layers — making it an essential component in mission-critical industrial installations.

Whether deployed in main incoming feeders, bus coupler positions, or outgoing feeder panels, the MT25N1 supports the structural integrity of the entire power distribution backbone. Its robust mechanical and electrical design enables long-term operational reliability in demanding environments including manufacturing plants, power utilities, petrochemical facilities, water treatment stations, and marine electrical systems.

The MT25N1 does not operate in isolation — it functions as the protection anchor within a layered automation architecture. In a complete Schneider Electric power and control system, the MT25N1 interfaces with multiple platform components to deliver system-wide coherence, diagnostic transparency, and operational resilience.

At the power layer, the MT25N1 works alongside Schneider Masterpact MTZ series breakers and Compact NSX moulded case circuit breakers to form a coordinated protection cascade. Upstream, it may be paired with Schneider Canalis KTA busbar trunking systems or Prisma G/P switchboards to distribute power efficiently across large industrial facilities. Downstream, it feeds into Schneider Acti9 iC60 miniature circuit breakers and iEM3000 series energy meters, enabling granular load monitoring at the sub-distribution level.

At the control and communication layer, the MT25N1 supports integration with Schneider EcoStruxure Power monitoring software via IFM (Interface Module) accessories. When equipped with a Modbus or Profibus communication module, the breaker's status, trip cause, load current, and energy data can be transmitted directly to a Schneider Modicon M340 or M580 PLC, enabling real-time power management from the control room. This data pathway supports SCADA integration through Schneider AVEVA System Platform or Wonderware, providing operators with live switchgear diagnostics without manual inspection.

At the HMI layer, operators can monitor MT25N1 status through Schneider Magelis HMIGTO series touchscreen panels or through EcoStruxure Power Advisor dashboards. Alarm conditions — including overload, earth fault, and short-circuit trips — are surfaced as structured events, enabling rapid fault isolation and minimising unplanned downtime.

At the protection and redundancy layer, the MT25N1's Micrologic electronic trip unit provides zone-selective interlocking (ZSI) capability, allowing it to coordinate with upstream Masterpact MTZ breakers to limit arc flash energy and reduce fault clearance time. This ZSI architecture is critical in data centres, hospital power systems, and continuous-process industries where fault-induced outages carry severe operational consequences.

At the maintenance layer, the drawout (withdrawable) design of the MT25N1 allows the breaker to be isolated, tested, and replaced without de-energising the entire switchboard. This feature, combined with Schneider's SmartTest self-testing capability and the availability of spare Micrologic trip units, ensures that maintenance cycles are predictable, safe, and minimally disruptive to production continuity.

Manufacturing & Automotive Assembly: In high-throughput manufacturing environments, the MT25N1 serves as the main incoming breaker for motor control centres (MCCs) powering conveyor drives, robotic welding cells, and CNC machining lines. Its high breaking capacity and electronic trip coordination ensure that a fault on one production line does not cascade to adjacent lines, preserving overall plant availability.

Power Utilities & Substations: In 11 kV/0.4 kV transformer secondary switchboards, the MT25N1 is deployed as the incomer or bus coupler breaker. Its zone-selective interlocking capability allows it to coordinate with downstream feeders, minimising fault clearance time and protecting transformer windings from thermal stress during fault conditions.

Petrochemical & Refinery Facilities: In hazardous area power distribution systems, the MT25N1 provides reliable protection for large motor feeders driving compressors, pumps, and agitators. Its robust mechanical design and high electrical endurance make it suitable for continuous-duty applications where breaker operation frequency is high and maintenance windows are limited.

Water Treatment & Pumping Stations: Municipal water infrastructure relies on uninterrupted power to maintain pump operation. The MT25N1's drawout design and remote trip capability — when integrated with a Modicon PLC — allow operators to perform controlled load shedding during grid disturbances, protecting pump motors from voltage sag damage.

Mining & Metallurgy: In underground and surface mining operations, the MT25N1 protects high-power drives for conveyor belts, crushers, and hoists. Its ability to withstand high mechanical vibration and its compatibility with Schneider's mining-grade switchgear enclosures make it a preferred choice for harsh-environment power distribution.

Marine & Offshore: Certified for marine applications, the MT25N1 is used in main switchboards and emergency switchboards on vessels and offshore platforms. Its compliance with IEC 60947-2 and compatibility with classification society requirements (DNV, Lloyd's Register) ensures regulatory acceptance in marine electrical systems.

Q1: Is the MT25N1 compatible with Schneider's EcoStruxure Power monitoring platform, and what communication modules are required? Yes. The MT25N1 is compatible with EcoStruxure Power when equipped with an IFM (Interface Module) accessory and a Modbus RTU or Ethernet/IP communication module. The IFM connects to the Micrologic trip unit's communication port and transmits real-time data — including load current, energy consumption, trip cause, and breaker status — to the EcoStruxure Power Advisor or to a Modicon PLC via standard industrial protocols. No proprietary gateways are required for Modbus integration.

Q2: Can the MT25N1 be used in a zone-selective interlocking (ZSI) architecture with upstream Masterpact MTZ breakers, and what are the wiring requirements? Yes. The MT25N1 supports ZSI when its Micrologic trip unit is configured for ZSI operation and connected to the upstream Masterpact MTZ breaker via a dedicated ZSI wiring harness. In a ZSI scheme, the MT25N1 sends a restraint signal to the upstream breaker during a downstream fault, allowing the downstream breaker to clear the fault at its fastest trip setting while the upstream breaker remains closed. This reduces arc flash energy and limits the fault impact to the affected zone. ZSI wiring is low-voltage (typically 24 V DC) and can be routed within the switchboard without additional isolation.

Q3: What is the warranty coverage for the MT25N1, and what is the typical lead time for in-stock units? All MT25N1 units supplied by NANKMOS are covered by a 12-Month Warranty against manufacturing defects and functional failures under normal operating conditions. Units are pre-shipment tested to verify mechanical operation, trip unit calibration, and communication module functionality before dispatch. In-stock units are typically available for same-week shipment. For project-specific quantities or urgent requirements, please contact [email protected] or call +86 18359268345 for real-time stock confirmation and lead time commitment.