Definition, advantages, and installation of porcelain type fuse cutout

Fuse is also called current fuse and fuse-link. It is mainly used for overload protection. If the fuse is properly placed in the circuit, the fuse will fuse and cut off the current when the current rises to a certain height and heat abnormally, which protects the safe operation of the circuit. So have you heard of porcelain-type fuse cutout? Porcelain-type fuse cutout is a kind of fuse. Next, let's take a look at the definition, advantages, and installation of porcelain-type fuse cutout. Here are some answers.

Here is the content list:

• What is a porcelain-type fuse cutout?

• The advantages of porcelain-type fuse cutout.

• Installation of porcelain-type fuse cutout.

What is a porcelain-type fuse cutout?

Porcelain-type fuse cutout is mainly used for short-circuit protection in low-voltage power distribution systems and electrical equipment. When in use, the porcelain-type fuse cutout is connected in series in the protected circuit. When a short circuit or severe overload occurs in the circuit, the melt in the porcelain type fuse cutout will automatically fuse due to heat, thereby cutting off the faulty circuit and playing a protective role.

The advantages of porcelain-type fuse cutout.

Porcelain-type fuse cutout has the advantages of simple structure, low price, and convenient replacement of the melt. It is widely used for short-circuit protection of lighting circuits and small-capacity motors. The porcelain type fuse cutout is composed of a porcelain cover, a porcelain seat, a moving contact, a static contact, and a fuse. Among them, the porcelain cover and the porcelain base are made of electrical ceramics. The power line and the load line are respectively connected to the static contacts at both ends of the porcelain base. There is a cavity in the middle of the porcelain base. The contact form of the plug-in fuse forming the arc extinguishing chamber with the convex part of the porcelain cover is surface contact. Because the porcelain-type fuse cutout can only be replaced after the porcelain cover is pulled out, and for fuses with a rated current of 60A and above, there is also braided asbestos that helps to extinguish the arc in the arc extinguishing chamber, so it is safer to use.

Installation of porcelain-type fuse cutout.

First, the porcelain-type fuse cutout should tighten the melt during installation (make the melt subject to a pulling force of about 24.5N), otherwise, it is easy to cause contact heat. Second, the porcelain-type fuse cutout should be installed firmly and reliably on the cross arm (frame), and there should be no shaking or shaking. Third, the porcelain-type fuse cutout should be installed on a cross arm (frame) with a vertical distance of not less than 4m from the ground. If it is installed above the distribution transformer, it should maintain a horizontal distance of 0.5m or more from the outermost contour of the distribution transformer. Just in case the molten pipe falls and causes other accidents. Fourth, the porcelain-type fuse cutout used must be a standard product of a regular manufacturer and have a certain mechanical strength. Generally, the melt is required to withstand a pulling force of at least 147N.

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