Short-circuit Protection Mechanism Of Drop-out Fuses In High-voltage Power Distribution Systems

drop out fuse in transformer is connected in series with an internal fuse in the circuit. When a short circuit current occurs, the fuse melts rapidly due to the surge in current, which in turn causes the fuse device to fall under its own weight, thus completing the circuit disconnection action. This physical falling process isolates the faulty line or equipment from the normal system, thereby limiting the further impact of the fault current.

drop out fuse price typically includes a fuse tube, insulating support, and contact mechanism in its structure. Under normal operating conditions, the fuse inside the fuse tube maintains a closed circuit. When the drop out fuse set fuse encounters a short circuit, the extremely high current will cause the fuse to quickly lose its conductivity, and then the fuse tube will fall rapidly due to gravity or mechanical assistance.