What Are The Installation Specifications For High-voltage Drop-out Fuses?

What are the installation specifications for high-voltage drop out type fuse?
Installation of high-voltage dropout fuse of transformer

(1) The fuse should be tightened during installation (so that the fuse is subjected to a tensile force of about 24.5N), otherwise it is easy to cause the contacts to heat up.

(2) expulsion drop out fuse should be installed firmly and reliably on the cross arm (frame) without any shaking or swaying.

(3) The fuse tube should have a downward inclination of 25°±2° so that the fuse tube can fall quickly under its own weight when the fuse is blown

(4) fuse drop out should be installed on a cross arm (frame) with a vertical distance of not less than 4m from the ground. If installed above the distribution transformer, it should maintain a horizontal distance of more than 0.5m from the outer contour boundary of the distribution transformer to prevent other accidents caused by the fuse tube falling.

(5) The length of the fuse tube should be adjusted appropriately. After closing the switch, the duckbill tongue should be able to hold more than two-thirds of the contact length to avoid malfunction of falling off during operation. The fuse tube should not be blocked by the duckbill to prevent the fuse tube from falling off in time after the fuse is melted.

(6) The fuse used needs to be a standard product of a regular manufacturer and have a certain mechanical strength. Generally, the fuse is required to withstand a tensile force of more than 147N.

(7) When 10kVht drop out fuse is installed outdoors, the phase-to-phase distance is required to be greater than 70cm.