3JQ 125 Circuit Protection

Fuses

Fuses are essential to protecting electrical circuits and equipment from overloads and short circuits. There are many different types and sizes of fuses available, each with its own application field and working principle. The 3JQ 125 is a type of fuse widely used in industrial and commercial applications.

Application Field

The 3JQ 125 fuse is primarily used to protect both 480V and 600V AC circuits from short circuiting or overloading. It is also used for motor protection. This type of fuse is used in applications with a maximum interrupting rating of 100,000 amps, a breaking capacity of 50,000 amps and a nominal voltage of 600V AC. It is an ideal choice for motor overload/short circuit protection in industrial buildings, manufacturing plants, and other commercial facilities.

Working Principle

The 3JQ 125 fuse is an electrical current safety device that works on the principle of heat sensing and controlled melting. It is made up of a thin sheet of aluminum foil wrapped around two metal rods, which are attached to the fuse wire at one end. When an electrical current is flowing through the circuit, the metal rods absorb some of the heat generated and cause the thin layer of aluminum foil to melt. This interrupts the flow of electricity to the circuit, which helps prevent overloads and short circuits.

The 3JQ 125 fuse is also designed in such a way that it reset itself after the short circuit or overload is resolved. When the circuit has cooled down enough and the overload is resolved, the aluminum foil regains its shape and the path for the current is restored. This helps keep the circuit protected from future overloads or short circuits.

Conclusion

The 3JQ 125 fuse is a widely-used electrical safety device that helps protect circuits from short circuits and overloads. It works on the principle of heat sensing and controlled melting of the thin aluminum foil which wraps around two metal rods. This interruption of the current flow helps to prevent further damage to the equipment or circuit in case of an overload or short circuit.