High Voltage Fuse Types

2 2 1 cartridge type.

High voltage fuse types.

High voltage hrc fuses. High voltage fuses are used to protect the instrument transformers small transformers. Some of the high voltage fuses are. The main problem of the high voltage fuses is that of the corona.

On some designs there are two fuse elements in. Cartridge type hrc fuse liquid type hrc fuse expulsion type hrc fuse. It is made up of silver copper tin. The rating voltage for high voltage fuse is above 1500v and upto 138000v.

These fuses are normally charged for voltages over 1500v to 138000v. 2 2 high voltage fuse. The construction of the fuse element is similar to the low voltage fuses. The making capacity of such type of fuses is up to 46 ka.

Some designs employ fuse elements wound in the form of a helix so as to avoid corona effects at higher voltages. In this type of fuse the fuse element is wound in the shape of the ring for removing the corona effect. Therefore the high voltage fuses have the special. Hv high voltage types of fuses generally hv fuses are used to protect the transformers like instrument transformers small power transformer and also used in power systems.

High voltage fuses hv all types of high voltage fuses are used upon the rated voltage up to 1 5 kv to 138 kv. They are classified into three types. 7 2 36 kv for all types of fuse links type. Transformers and power systems use high voltage fuses.

The fuse element in high voltage hv fuses are made up of either silver or copper sometimes even tin is used in order to provide reliable and stable performance. Medium voltage current limiting and expulsion fuses suitable for the protection of distribution transformers voltage transformers capacitor banks motor circuits and installations with other switching apparatus. Resettable fuses are also called as self resetting fuses. The fuse unit is available as 3 pole and 4 pole unit.

They can safely break depending upon rating currents of the order of 3 times the load current. Semi enclosed fuses are fuse wire carriers in which the fusible wire itself can be replaced. High voltage hv fuses are used in power system to protect the power transformer distribution transformers and instrument transformer etc where circuit breakers may not be able to protect the system. The exact fusing current is not as well controlled as an enclosed fuse and it is extremely important to use.

When heat generated the arc produces which causes the boric acid to evolve high amount of gases. High voltage fuses are rated for more than 1500v and up to 13kv. The vapour of fuse element and the powder together form the high resistive substance which extinguishes the arc. High voltage fuses of the expulsion type have fiber or glass reinforced plastic tubes and an open end and can have the fuse element replaced.

The fuse element uses material such as copper silver or tin. In expulsion type high voltage hv fuses the fuse link chamber is filled with boric acid.