0897010.N

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0897010.N Application Field and Working Principle

Fuses are electromechanical devices designed to protect electrical circuits from short-circuit or overload failures. The 0897010.N is an average-time delay (ATD) fuse from Littelfuse designed to help protect motors from overloads. This fuse has a 250V ac voltage rating, a 10A current rating and a 200kA interrupt rating.

Application Field

The 0897010.N is designed to protect three-phase motors and is often used to help protect other electrical circuits. This fuse can be applied to motors rated at 100A and below, as well as other electrical systems and components in the same voltage range. Therefore, the 0897010.N can be found in a wide variety of industrial applications. Commonly, it is used to protect motors, such as those found in HVAC wells, water pumps, cooling fans, conveyors and elevators.

Working Principle

The 0897010.N has an average-time delay (ATD) operating principle. This is a thermal-magnetic operating principle in which the device responds to both thermal and magnetic forces. This fuse has a polyester time-delay element that heats up when an overload current is applied and deforms an armature plate due to the heat. This plate carries the current, creating a magnetic field which releases an electromagnetic latching mechanism in the fuse. The latching mechanism opens the contacts in the fuse, thus cutting off current flow.

Like a standard fuse, the 0897010.N has an internal element made up of either metal or metal alloy strip that melts at a certain temperature when too much current passes through the device. However, this fuse is specifically designed to protect three-phase motors from long-term overcurrent situations which can cause the motor to run at an excessive temperature and eventually fail. To accomplish this, the ATD device adds the thermal element mentioned above to the standard fuse element.

The thermal element is composed of a polyester strip, which has the ability to gradually deform when exposed to an elevated temperature. The current in the fuse flows through the polyester strip, thereby allowing it to gradually deform when too much current is flowing. This deformation causes an armature plate to move and creates a magnetic field, releasing the fuse\'s internal latch and breaking the circuit.

Conclusion

The 0897010.N ATD fuse from Littelfuse is designed to protect three-phase motors and is suitable for use in a variety of industrial applications. This fuse operates using a thermal-magnetic operating principle, with an internal element made up of a metal strip or metal alloy that melts when too much current passes, along with a polyester strip that heats up and deforms an armature plate, releasing the fuse’s internal latch and breaking the circuit. This fuse is essential in helping protect motors and other electrical systems and components from long-term over-current situations.

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