3JQ 750-R

Fuses

Fuses protect electrical systems and components from damage due to overload and other hazardous conditions. They operate automatically, providing fast and reliable interruption of circuits when an overload or short circuit occurs.

3JQ 750-R Application Field and Working Principle

The 3JQ750-R is especially suited for the protection of electricity metering systems or other automatic energy monitoring systems. Its small size makes it ideal for installation in limited spacesand it can handle currents up to 250 A. The 3JQ750-R is designed to provide short circuit protection and overload protection.

Working Principle: The 3JQ750-R uses an electromagnet to trip the current within the fuse when an overload or short circuit occurs. The magnetic field created by the current in the electromagnet attracts a springloaded armature, moving it to pull the trip arm. This causes a bimetallic strip to open, which interrupts the circuit and disconnects the power.

The 3JQ750-R provides extra protection against overloads by using a sensitive method of detecting excess current. It works by sensing the current and temperature of the fuse and comparing it to predetermined thresholds. When the fuse senses an excessive current or temperature, it will automatically open the circuit, preventing a potential overload or short circuit from occurring.

The 3JQ750-R also features a built-in signal indicating when the fuse has been tripped. This signal can be used to detect fault conditions, enabling corrective action to be taken without having to manually inspect the fuse.

The 3JQ750-R is also designed to resist temperature-induced current fluctuations, allowing it to provide reliable and accurate protection in even the harshest environments.

In conclusion, the 3JQ750-R is an ideal choice for protecting electricity metering systems and other automatic energy monitoring systems. Its small size and superior protection capabilities make it a perfect choice for any application where space is limited and reliable circuit protection is a must.