Schneider Masterpact NW12H1 Air Circuit Breaker

Feature & Principle

It belongs to Schneider Masterpact NW series air circuit breaker frame. It can be fitted with MicroLogic trip unit to achieve overload, short-circuit and earth fault multi-section protection. It supports fixed and withdrawable installation, with mechanical interlock safety design. Optional motor charging mechanism, auxiliary contacts and communication modules for SCADA remote monitoring. This model is discontinued, mainly used for maintenance replacement of old low voltage distribution cabinets.

Specifications

Model: Masterpact NW12H1 Brand: Schneider Series: Masterpact NW Rated current In: 1250A Ultimate breaking capacity Icu: 65kA@440V AC Rated voltage Ue: up to 690V AC Pole: 3P / 4P optional Structure: Fixed / withdrawable Trip unit: MicroLogic series optional Application: Factory incoming cabinet, power plant auxiliary power, petrochemical distribution system Certification: CE, IEC

Components & Diagnostics

Main contact assembly, arc extinguishing chamber, MicroLogic trip unit, stored energy operating mechanism, closing coil, auxiliary switch, current transformer. Common faults: contact ablation, energy storage stuck, trip unit misoperation, communication loss, coil burnout.

Product Brief

Masterpact NW12H1 air circuit breaker, Schneider Masterpact NW low voltage distribution spare widely used for industrial power cabinet overhaul and replacement.