Table of Contents
What is the fuse rating formula?
The fuse rating can be calculated by dividing the power used by the appliance by the voltage going into the appliance.
How is appropriate fuse selected?
Fuse selection process
- Make sure to select a fuse that has a rated voltage higher than the voltage of the circuit.
- Only select DC rated fuses for DC circuits, and AC rated fuses for AC circuits.
Can I use a 250v fuse instead of 12V?
However, for less than 12V, or if you need a very precise voltage level use fuses specificaly adapted. Yes, you can use them, The amp rating does not change.
What does the current rating of a fuse indicate?
Current rating is the maximum current that a fuse will carry for an indefinite period without too much deterioration of the fuse element. The higher the output current rating, the more power will be able to be supplied.
What does AIC rating stand for?
Ampere Interrupting Capacity
AIC stands for Ampere Interrupting Capacity. The AIC rating indicates the maximum fault current (in amps) that an overcurrent protection device (circuit breaker, fuse, etc.) will safely clear when a fault is applied at the load side of the overcurrent protection device.
How do you calculate fuse size?
Calculating a fuse size Determine the operating voltage of the power source. Determine the watts required by the circuit. Use a calculator to divide the number of watts by the voltage. In the case of a 110-volt circuit, using 1200 watts, the calculation would be: 1200/110=10.9 amps.
How are fuses rated?
Fuses are rated in amperes because that is the component in the circuit that is permitted to vary in direct relation to the load. There is no significant voltage change in a circuit when the current in that circuit is approaching the ampere limit on the fuse protecting the circuit.
What is fuse rating?
A fuse rating is the current need to blow (break) the fuse. When a fuse has blown it removes electrical power from an electrical circuit. The fuse rating is usually on the side of the fuse. The fuse rating is usually defined in ‘amps’ – amps are the unit of measurement of electrical current.