Time limit fuses are essential to protecting everything from the wiring in a building to every part of the circuit and electrical equipment that is connected to that wiring.
Time limit fuses differ from fast blow (fast acting) fuses because time limit fuses can take a short period of overload before blowing, but they are also used to protect against sustained excess current and short circuits that could lead to overheating, equipment damage, or fire hazards. Many times, an electrical device with a large start-up current will momentarily exceed what would be considered "normal" operating current when the device is started. Typically, the start-up load is considered very harmful to the motor and transformer.
Time limit fuses prevent the need for constant replacement of fuses due to copious amounts of overdoses and minimize potential downtime. They protect against sustained excessive current, which could lead to overheating, damage or create hazardous situations. They are the difference between the ability to detect harmless surges caused by normal operation and being able to prevent catastrophic (fault) surges that can be damaging to both property and life.
