This series of knife-type contact fuses consists of three parts: fuse element, base, and carrying fuse component. It is suitable for overload and short circuit protection (gG/gL) in electrical installations and circuits with a rated voltage of AC 500/690V and a rated current of up to 1250A for AC 50Hz or 60Hz.
The fuse element is a consumable part that needs to be replaced after operation. It consists of the fusible link, fuse tube, arc extinguishing medium, and contact end plates. The fusible link is encapsulated within the fuse tube, which is filled with sufficient arc extinguishing medium. Both ends of the fusible link are securely electrically connected to the contact end plates, forming a knife-type contact insert structure. The fuse element can be equipped with a fuse indicator or striker, which can show a blown fuse (indicator) or trigger a microswitch (striker) to activate other auxiliary devices, alerting relevant personnel.
The base is the fixed component of the fuse that supports the electrical connection between the fuse element and the incoming circuit. It consists of an insulating base plate, wedge-shaped static contact, and retaining ring, and has an open structure. The terminal at the front of the plate is connected to the external wire using bolts. The base plate has two reserved mounting holes for fixing purposes. The entire base has advantages such as good heat dissipation, high tensile strength, reliable contact, and ease of operation.
The carrying fuse component is the moving part of the fuse, used for installing or removing the fuse element. It consists of a latch, button, baffle, and handle. The latch comes in three sizes, accommodating fuse elements of sizes 000 to 00, 0 to 3, and 4, offering reliable insulation, safety, convenience, and light operational force.
