The Schneider Electric ComPacT NS630b–NS1600 Molded Case Circuit Breaker (MCCB) is designed for high-current low-voltage power distribution systems, providing reliable protection against overloads, short circuits and electrical faults. With frame ratings from 630 A to 1,600 A, the series offers multiple breaking capacity options, 3-pole and 4-pole configurations, and interchangeable MicroLogic electronic trip units. Its compact construction, flexible installation arrangements and advanced monitoring capabilities make it suitable for main circuit protection and feeder applications in industrial and commercial electrical distribution networks.
Electronic Protection and MicroLogic Trip Units
The ComPacT NS630b–NS1600 series features MicroLogic electronic trip units with configurable protection functions to accommodate different electrical distribution requirements. Depending on the selected trip unit, protection functions include long-time overload protection, short-time and instantaneous short-circuit protection, and ground-fault protection. Selected advanced versions also provide current measurements, power monitoring, alarm management and fault information. The interchangeable trip unit design allows replacement or configuration changes in the field, providing flexibility for maintenance and system upgrades.
Breaking Capacity and Protection Performance
The ComPacT NS630b–NS1600 range offers different breaking capacity levels to meet varying short-circuit protection requirements. Available performance versions include N, H and L, with R options available for selected manually operated models. These versions provide different ultimate breaking capacities (Icu) and service breaking capacities (Ics), depending on the rated operational voltage and specific product configuration. This range of options allows users to select appropriate circuit breakers according to the prospective short-circuit current and electrical system protection requirements.
Flexible Installation and Operating Configurations
Designed for integration into low-voltage switchboards, the ComPacT NS630b–NS1600 series is available in fixed and drawout configurations, with 3-pole and 4-pole versions. Connection arrangements include front or rear connections, with busbar and cable connection options depending on the selected configuration. Operating options include manual toggle handles, rotary handles and electrically operated mechanisms. Drawout versions allow the circuit breaker to be withdrawn from its chassis without disconnecting the power connections directly, facilitating inspection, replacement and maintenance.
Electrical Monitoring and Communication
Selected ComPacT NS configurations support advanced electrical monitoring through MicroLogic trip units and compatible communication accessories. Depending on the selected trip unit, functions can include current measurement, power and energy monitoring, event recording, alarm indication and remote device status monitoring. Modbus communication capabilities and compatible PowerLogic monitoring solutions support integration into electrical management systems, helping operators monitor distribution conditions and manage electrical loads.
Applications
The ComPacT NS630b–NS1600 MCCB series is designed for high-capacity low-voltage electrical distribution systems. Typical applications include:
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Main Power Distribution: Protection of incoming circuits in industrial and commercial switchboards.
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Feeder Protection: Overcurrent and short-circuit protection for downstream distribution circuits.
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Busbar Systems: Circuit protection and switching in high-current distribution assemblies.
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Industrial Facilities: Electrical protection for manufacturing plants and large-scale industrial installations.
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Commercial Infrastructure: Power distribution protection in large buildings and infrastructure facilities.
