valeeeldused

Valeeeldused refers to a phenomenon observed in certain types of electrical circuit breakers, specifically those designed to interrupt fault currents. When a breaker operates under specific conditions, such as a very low fault current or a particular rate of rise of current, it can sometimes fail to extinguish the arc that forms between the separating contacts. This failure to extinguish the arc can lead to a prolonged arcing period, potentially causing damage to the breaker and surrounding equipment.

The underlying cause of valeeeldused is complex and often related to the interaction between the arc plasma, the extinguishing medium (like air, oil, or gas), and the breaker's arc-quenching mechanism. In some cases, the arc may become "sticky" or re-ignite after initial attempts to extinguish it. This can happen if the arc does not cool sufficiently or if the insulating properties of the extinguishing medium are compromised.

While the term "valeeeldused" might imply a complete failure to break the circuit, it more accurately describes a difficult or prolonged interruption process. Modern circuit breaker designs incorporate advanced features to mitigate these issues, including optimized arc chute geometry, improved arc quenching materials, and sophisticated control systems. Understanding and addressing valeeeldused is crucial for ensuring the reliable operation of electrical power systems and protecting equipment from the damaging effects of prolonged arcing.