Description
The MasterPact NW Air Circuit Breaker is a draw‑out or fixed‑mount ACB designed for main incoming, distribution feeder, and protection duties in industrial, commercial, and infrastructure electrical installations. It belongs to Schneider Electric’s MasterPact series and is widely regarded as a benchmark for high‑current circuit protection due to its mechanical robustness, high interrupting ratings, and modular control options.
With a broad range of rated current options (typically 800 A to 6300 A) and short‑circuit breaking capacities (42 kA up to 150 kA depending on model and configuration), MasterPact NW ACBs are suitable for environments where high fault levels may occur. They are available in 3‑pole or 4‑pole versions, are compliant with IEC 60947‑1/‑2 and other international standards, and can be equipped with Schneider’s MicroLogic electronic trip units that integrate protection, metering, and energy management functions.
The ACB’s universal design lets it accept a wide range of auxiliaries and accessories (such as shunt releases, undervoltage releases, auxiliary contacts, communication modules, etc.), which enhances flexibility for system integration and facilitates standardization across panels. MicroLogic units can offer advanced functions like current, voltage, power, energy measurements, selective protection curves, and communication options with electrical management systems.
Although newer generations (like MasterPact MTZ) have evolved with integrated digital features, the MasterPact NW remains in service across many industrial installations due to its proven reliability and rugged design.
📊 Typical Specifications Table (Representative)
| Specification | MasterPact NW Typical Values / Options |
|---|---|
| Product Name / Series | MasterPact NW ACB (Schneider Electric) |
| Application | Protection of electrical distribution systems (main incoming / feeder) |
| Rated Current Range (In) | ~800 A to 6300 A (varies by frame) |
| Rated Operational Voltage (Ue) | Up to ~690–1150 V AC (depends on model) |
| Poles | 3‑pole / 4‑pole options |
| Breaking Capacity (Icu) | ~42 kA to 150 kA (system dependent) |
| Short‑Time Withstand (Icw) | Model dependent (e.g., 65 kA 1 s for many H1 versions) |
| Rated Impulse Withstand (Uimp) | ~12 kV |
| Rated Insulation Voltage (Ui) | ~1000 V |
| Trip Unit / Protection | MicroLogic electronic units (A/P/E/H) |
| Measurement Capabilities | Current/Voltage/Power/Energy (with advanced MicroLogic) |
| Mounting | Draw‑out or Fixed |
| Accessories | Auxiliary contacts, releases, communication modules, interlocks |
| Standards Compliance | IEC 60947‑1/‑2, UL489, ANSI/UL1066, CCC … |
| Operating Temp. | Typically –25 °C to +70 °C (varies by model) |
| Usage | Main protection, feeder protection, generator protection, motor protection, energy management |
🔍 Key Features
-
High current range: Covers up to ~6300 A for large installations.
-
High breaking capacity: Capable of interrupting up to ~150 kA fault currents.
-
Modular protection units: MicroLogic trip units provide protection profiles and metering.
-
Flexible accessories: Field‑installable auxiliaries expand functionality (e.g., shunt trip, under‑voltage trip).
-
Compliance with global standards: Suitable for international industrial use.
-
Universal design: Standardized accessories and flexible mounting help reduce inventory and ease integration.
📌 Typical Applications
-
Industrial power distribution (main feeder / incomer)
-
Commercial buildings and infrastructure
-
Energy management systems
-
Generator and UPS protection
-
Motor feeder protection
Reviews
There are no reviews yet.