Analysis On The Action Mechanism And Dynamic Characteristics Of Drop-out Type Fuse

As a classic device for power distribution network line protection, drop out fuse unique drop action mechanism integrates the comprehensive effects of thermodynamics, material mechanics, and arc physics. This article will take the Enbime drop out fuse as an example to analyze its operating principle from the perspective of energy conversion, and explore the influence of key parameters on its operating characteristics.

Structural features and functional coupling
The device consists of a melting tube (ceramic or epoxy resin), a melt (silver copper alloy), an arc extinguishing medium (gas producing material+quartz sand), and a spring energy storage mechanism. The core design is to achieve a four in one coordinated control of "overcurrent fuse - mechanical unlocking - arc suppression - status indication".