<p>When selecting a circuit breaker for industrial or commercial applications, it&#39;s essential to focus on the technical specifications that ensure reliability and performance. The Non-automatic Air Circuit Breaker (ACB) in question is designed to meet demanding electrical requirements with precision and efficiency.</p><p>At its core, this ACB is engineered for high-capacity operations, boasting a rated current of 3200 A. This makes it suitable for environments where substantial power handling is necessary. Additionally, it operates effectively within a maximum rated voltage of 690 VAC, aligning with various industrial standards.</p><p>Safety and durability are paramount in any electrical component. This breaker excels with a rated impulse withstand voltage of 12 kV, ensuring robust performance under transient conditions such as lightning strikes or switching surges. Furthermore, the unit&#39;s rated insulation voltage stands at 1000 VAC, providing an extra layer of protection against electrical faults.</p><p>In terms of fault endurance, this ACB has been tested to withstand short-time currents up to 66 kA without compromising its integrity—an impressive feat that underscores its robustness in adverse conditions. Its breaking capacity also matches this figure at 66 kA, indicating that the breaker can safely interrupt significant fault currents without damage.</p><p>The frame size E4.2 indicates the physical dimensions and mounting configurations compatible with existing systems—a critical factor when retrofitting or integrating into established setups. With three poles available, this breaker accommodates three-phase systems efficiently.</p><p>For those concerned about energy efficiency and thermal management within their installations, note that the power loss associated with this circuit breaker is measured at 743 W during operation. While not negligible, understanding these losses helps in planning cooling solutions or energy audits within larger systems.</p><p>Installation flexibility is offered through its horizontal rear spread terminal type—ideal for specific panel designs requiring such orientation for optimal connectivity and space utilization.</p><p>Conformance to international standards assures users of quality and compatibility across global markets; thus adherence to IEC 309 ensures rigorous testing protocols have been met or exceeded by this product.</p><p>In summary: if your application demands a reliable non-automatic ACB capable of handling high currents while maintaining safety under extreme conditions—this model delivers on all fronts without unnecessary frills but rather focuses purely on functional excellence tailored for professional use cases across Australia’s diverse industrial landscape.</p>