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What is an Electrical Fuse?

Encyclopedia

07/30/2024

What is an Electrical Fuse?

Electrical Fuse Definition

An electrical fuse is a protective device that breaks the circuit when the current exceeds a predetermined value to prevent damage.

Fuse Wire Function

The fuse wire carries normal current without excessive heating but melts and breaks the circuit when excess current flows through.

Major Parameter

Minimum Fusing Current
Current Rating of Fuse
Fusing Factor
Prospective Current in Fuse
Melting Time of Fuse
Operating Time of Fuse

Fuse Law

Materials for Fuse Wires

Common fuse wire materials include tin, lead, zinc, silver, antimony, copper, and aluminum, each with specific melting points and resistances.

HRC Fuse

An HRC fuse, or High Rupturing Capacity fuse, can handle heavy short-circuit currents for a set period before blowing, providing reliable circuit protection.

Operating Time of Fuse

The operating time of a fuse is the sum of its melting time and arcing time, defining how long it takes to interrupt the current flow during a fault.

Topics

Power Systems Electrical Fuse

Encyclopedia

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