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NT & NW Air Circuit Breakers
Home / Products / Air Circuit Breakers / NT & NW Air Circuit Breakers / High-Performance Air Circuit Breaker 1600A–6300A, Fixed and Drawout Type
Working Principle:
An air circuit breaker (ACB) operates by automatically interrupting the current flow upon detection of an overload or short circuit. Under normal conditions, its main contacts remain closed, allowing unobstructed current flow. When sustained overcurrent occurs, the thermal element warps from heat accumulation, triggering the tripping mechanism. In sudden short-circuit events, the solenoid coil produces an instantaneous magnetic force to activate the tripping mechanism. This action rapidly separates the main contacts, generating a strong electric arc that is immediately directed to the arc-extinguishing chamber. There, the arc is split, cooled, and extinguished, safely disconnecting the circuit and preventing system damage.
Quality & Key Features Summary
Certifications & Standards: Complies with international certifications (CE, RoHS) and adheres to IEC/GB standards, ensuring safety and quality recognition.
High Reliability & Durability: Features a modular design and an exceptionally long mechanical service life of over tens of thousands of operations.
Intelligent Protection: Equipped with a built-in Micrologic trip module for real-time monitoring (current, voltage, faults), remote control, and comprehensive protection against overloads, short-circuits, and ground faults.
Robust Performance: Offers a high breaking capacity (up to 150kA) and is designed for demanding environments like industrial plants, data centers, and large buildings, ensuring operational safety and continuity.
Advanced Safety: Utilizes a proven air extinguishing principle to safely interrupt fault currents, protecting electrical systems and personnel.
Intelligent Monitoring & Control: Features a built-in Micrologic trip module for real-time monitoring of current, voltage, and fault logging, with remote control capability. Compatible with energy management platforms like EcoStruxure.
High Reliability & Durability: Utilizes a modular design with an operational life exceeding tens of thousands of cycles. Offers optional electronic or thermal-magnetic protection.
Comprehensive Protection: Provides protection against overloads, short-circuits, and ground faults. Supports selective coordination to minimize downtime.
High Breaking Capacity: Designed to interrupt fault currents of up to 150kA, ensuring system safety.
Flexible Expansion: Supports the addition of communication modules (Modbus, Ethernet) and auxiliary contacts for enhanced functionality.
Wide Application: Ideal for protecting critical power distribution systems in industrial plants, commercial buildings, data centers, airports, and hospitals.
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