Drop-out Fuses Are Indispensable Protectors Of Electronic Equipment And Power Systems.

The drop fuse fuse is commonly used in 10kV and below overhead distribution lines, as well as the primary side of distribution transformers, as a primary overcurrent and short-circuit protection device.

Under normal operation, the current flows smoothly and unobstructed through the circuit formed by the fuse element and the fusible link, and the system is in a closed state. When a sudden short circuit or overload occurs, the fusible link melts rapidly. The high-pressure gas generated by the electric arc inside the fuse tube forcefully extinguishes the arc. After the fuse breaks, the fuse tube falls rapidly due to its own weight and the action of the stationary contact spring, thus breaking the circuit. This physical "falling" action provides maintenance personnel with a direct indication of the fault and facilitates the identification of the fault phase.

The drop fuse cutout fuse has a simple structure and good mechanical strength and environmental adaptability. This allows it to operate stably for a long time in outdoor distribution environments with high humidity, dust, large temperature variations, and exposure to sun and rain.

In routine maintenance of power systems, the visible disconnection position of the drop out expulsion fuse fuse means that after a line fault occurs, the faulty section can be quickly located without the need for auxiliary detection equipment. This is extremely important for improving the operational reliability and maintenance efficiency of the distribution system. At the same time, it also provides maintenance personnel with clear operational and repair guidelines.