002641015

Electrical Specialty Fuses are designed to protect electrical circuits from unintentional arcs and overheating caused by faults, thus protecting people and equipment against fires and other hazards. Fuse 002641015 is one such example of an electrical specialty fuse. This article will provide an introduction to the application field and working principles of this fuse.

Application Field

The 002641015 Fuse is designed primarily for panelboard, switchboard, motor control, and busway application, where branch circuits short circuit protection and current limitation is necessary. This specialty fuse is applicable to AC systems with voltage ratings ranging from 129V to 851V, and current ratings from 0 up to 500A. The fuse is rated to withstand and interrupt up to 200kAIC, and is UL listed, Class T, for full rated interrupting current.

Construction

The fuse is made up of a cylindrical body and links which encase a central element. The body is composed of an outer shell of aluminum alloy and an inner casing of zinc which helps to facilitate faster heat transfer. The fuse terminals are also made of aluminum, and they serve the purpose of connecting the fuse with the panelboard or switchboard it is to be used in. The fuse links are copper or phosphor bronze and they serve to physically break the electrical current once the set limit is exceeded and the fuse trips.

Working Principle

The 002641015 Fuse utilizes an enclosed thermal-magnetic trip device. When an overloaded current passes through the fuse, it trips the thermal-magnetic device which breaks the electrical circuit by breaking the alloy links in the anvil. The thermal-magnetic trip unit utilizes both thermal and magnetic elements to sense the current and the heat. If the heat is increased, the thermal element of the trip device actuates to open the contacts in the anvil and then the fuse trips. The trip device also senses the current and is activated at a preset current level, allowing the fuse to trip before it reaches the higher levels which will cause burning and other hazards.

Conclusion

Electrical Specialty Fuses such as the 002641015 are designed to protect circuits, people, and equipment from harmful overcurrents and short circuits. The fuse is designed for panelboard, switchboard, motor control, and busway applications with voltage ratings ranging from 129 to 851 V, current ratings from 0 to 500 A, and a 200kAIC interrupting rating. The fuse utilizes a thermal-magnetic trip device which is triggered by both current and heat in order to open the contacts in the anvil and break the circuit.