Response Performance Of Drop-out Fuses Under Abnormal Current Conditions

The drop out fuse in transformer fuse mainly consists of a porcelain bushing, fuse tube, and stationary and moving contacts. These components form a complete circuit during normal operation. When an abnormal current occurs in the system, such as an overload or short circuit, the fuse section of the drop out fuse price fuse will reach the melting point due to thermal effects, triggering an internal arc and gas expansion. Subsequently, the bonding force between the fuse tube and the contacts disappears, and the tube falls rapidly under its own weight, interrupting the circuit and achieving circuit isolation.

Unlike ordinary fuses, the drop out fuse set fuse's mechanism design allows it to, at the moment the fuse melts, rely on its own gravity and the action of the elastic contacts to detach the fusible element from the conductive position, thereby breaking the circuit.