SCHNEIDER MASTERPACT NW NW12H1 CIRCUIT BREAKER ACB 1250A MICROLOGIC 6.0 4P

Product Overview

The SCHNEIDER MASTERPACT NW NW12H1 Air Circuit Breaker is a heavy-duty low voltage air circuit breaker equipped with Micrologic 6.0 trip unit, engineered for industrial and marine power distribution systems, designed in accordance with IEC 60947-2 and Schneider Electric power control specification. Built for overload protection, short-circuit interruption & earth fault monitoring, this 4P 1250A ACB withstands temperature fluctuation and mechanical vibration inside power switchgear rooms, delivers stable continuous operation, and offers comprehensive power system protection for power plants, oil & gas platforms, ships and large industrial facilities.

Featuring 4-pole main contact structure, Micrologic 6.0 digital protection unit & high short-circuit breaking capacity. Both draw-out and fixed cabinet mounting are supported, adapting to limited installation space inside low voltage switchgear and power control cabinets. The modular assembly allows separate replacement of trip unit without full power system shutdown, greatly reducing equipment downtime for service. Equipped with electrical parameter measurement, fault event recording & local status indicator, mature hardware structure prevents power system damage and guarantees safe power distribution during continuous duty.

For dependable overload protection, short-circuit interruption & earth fault monitoring, this Schneider Masterpact NW ACB continuously monitors line current and voltage, trips rapidly when abnormal electrical conditions occur to protect downstream cables and loads. Reliable overload protection, short-circuit interruption & earth fault monitoring, premium industrial grade components provide excellent resistance to thermal stress, extending service life in harsh industrial working environments. Practical electrical parameter measurement, fault event recording & local status indicator, precise protection logic lowers false tripping risk during long-hour operation, ensuring stable power supply under variable load conditions.

During continuous overload protection, short-circuit interruption & earth fault monitoring, this NW12H1 air circuit breaker is widely applied for main incoming and bus tie protection, fully compatible with Schneider EcoStruxure power management architecture. Stable overload protection, short-circuit interruption & earth fault monitoring, mature Schneider low voltage power protection technology with easy spare parts replacement and convenient after-sales maintenance. Robust electrical parameter measurement, fault event recording & local status indicator, simplifies switchgear layout and reduces installation workload for power distribution retrofitting and electrical system overhaul projects.

Technical Specifications

Brand: SCHNEIDER Model: MASTERPACT NW NW12H1 Product Type: Air Circuit Breaker Rated Current: 1250A Poles: 4P Trip Unit: Micrologic 6.0 Mounting: Draw-out / fixed switchgear installation Function: Overload, short-circuit and earth fault protection, power monitoring Rated Voltage: Up to 690V AC Protection: Thermal overload, short circuit, earth fault, vibration and temperature resistance Application Field: Power station, marine vessel, oil & gas, industrial building low voltage power distribution

Key Features

Designed for overload protection, short-circuit interruption & earth fault monitoring, heavy-duty air circuit breaker for industrial and marine power distribution application. Adopts 4-pole main contact structure, Micrologic 6.0 digital protection unit & high short-circuit breaking capacity, cabinet installation simplifies layout and reduces wiring work. Equipped with electrical parameter measurement, fault event recording & local status indicator, switchgear mounting adapts limited power cabinet space. Modular structure allows separate trip unit replacement without full power system shutdown, cutting downtime. Premium industrial grade components resist temperature change and vibration, stable performance under variable site conditions and long-hour operation. Spare air circuit breaker for retrofitting and overhaul of Schneider low voltage power distribution systems.

Application Scope

‑ Main power protection unit: air circuit breaker performing overload protection, short-circuit interruption & earth fault monitoring, safeguards main power feeders and busbars in industrial and marine electrical systems. ‑ Compact switchgear installation: 4-pole main contact structure, Micrologic 6.0 digital protection unit & high short-circuit breaking capacity, draw-out design saves space and eases field cabinet layout. ‑ Low-maintenance continuous operation: electrical parameter measurement, fault event recording & local status indicator, trip unit replacement without dismantling the whole breaker frame. ‑ Spare-part maintenance: replacement air circuit breaker for overhaul and hardware renewal of Schneider industrial low voltage power distribution systems.

Package & Delivery

Each SCHNEIDER MASTERPACT NW NW12H1 1250A 4P ACB with Micrologic 6.0 is packed with protective wrapping and shockproof export carton for electrical spare parts shipment. Complete delivery includes NW12H1 air circuit breaker main unit; installation manual and maintenance guide are provided for reference. Matching auxiliary contacts, shunt trip coils and under voltage release accessories are available as optional spare parts.