A down-fault fuse is a commonly used short-circuit protection switch for 10kV distribution line branches and distribution transformers.

Falling fuse breakers are installed on the 10kV distribution line branches, capable of reducing the scope of power outages. With a distinct breaking point, they offer the function of isolation switches, creating a safe working environment for maintenance sections of lines and equipment.

Installed on the distribution transformer, it can serve as the main protection for the transformer.

It boasts features such as economy, ease of operation, and strong adaptability to outdoor environments. It is widely used in 10kV power distribution lines and the primary side of distribution transformers for protection and equipment commissioning/cutoff operations, and has gained widespread popularity.