Introduction To The Main Types And Characteristics Of Protective Fuses

Introduction to the main types and characteristics of protective drop out fuse
Main types

11 kv drop out fuse: Commonly used in low-voltage circuits, with a simple structure, consisting of a porcelain base and a porcelain plug-in. The porcelain plug-in is filled with a fuse, and the porcelain plug-in is inserted into the porcelain base when in use. It has the characteristics of small size and easy replacement, and is generally used for overload and short-circuit protection of lighting circuits and small-power electrical appliances.

11kv drop out fuse: Commonly used in machine tool electrical control equipment. Its fuse is installed in a porcelain cap, and there is a spiral wire on the porcelain cap. When it is screwed into the porcelain base, the fuse is connected to the circuit. When the fuse is blown, there is an obvious indication mark, which is convenient for quick detection of faults. At the same time, it also has the advantage of strong arc extinguishing ability.

11kv drop out fuse manufacturer: It is divided into a filled enclosed fuse and an unfilled enclosed fuse. Filled enclosed fuses are generally used in circuits with large short-circuit currents. The fuse body is filled with fillers such as quartz sand. When the fuse body melts, the arc is quickly extinguished in the quartz sand, and the arc extinguishing ability is strong. Unfilled enclosed fuses are often used for general overload and short-circuit protection, and their structure is relatively simple.

33kv drop out fuse: Mainly used for the protection of semiconductor components. Semiconductor components (such as thyristors) have a weak ability to withstand overcurrent. Fast fuses can cut off the circuit in a short time (generally within a few milliseconds) to protect semiconductor components from being damaged by excessive current.
Features

Simple structure: 33kv fuse is mainly composed of fuse, fuse tube and contact base. The structure is relatively simple, the cost is low, and it is easy to manufacture and install.

Reliable action: When the current in the circuit exceeds the specified value, cover drop out fuse can automatically fuse and cut off the circuit. The action is accurate and reliable, and it can effectively protect electrical equipment.

Strong breaking capacity: Different types of drop fuse have different breaking capacities, which can safely cut off the circuit under different short-circuit current conditions to ensure the safe operation of the circuit.

Selective protection: By reasonably selecting the rated current and fusing characteristics of drop fuse cutout, selective protection of the circuit can be achieved, that is, when a part of the circuit fails, only the corresponding drop out expulsion fuse will be fused without affecting the normal operation of other parts.