Search results
Results from the WOW.Com Content Network
The fuse element is made of zinc, copper, silver, aluminum, [citation needed] or alloys among these or other various metals to provide stable and predictable characteristics. [4] [5] The fuse ideally would carry its rated current indefinitely, and melt quickly on a small excess. The element must not be damaged by minor harmless surges of ...
In electrical engineering, IEC 60269 is a set of technical standards for low-voltage power fuses. [1] The standard is in four volumes, which describe general requirements, fuses for industrial and commercial applications, fuses for residential applications, and fuses to protect semiconductor devices.
A resettable fuse or polymeric positive temperature coefficient device (PPTC) is a passive electronic component used to protect against overcurrent faults in electronic circuits. The device is also known as a multifuse or polyfuse or polyswitch .
Fuse – over-current protection, one time use; Circuit breaker – resettable fuse in the form of a mechanical switch; Resettable fuse or PolySwitch – circuit breaker action using solid state device; Ground-fault protection or residual-current device – circuit breaker sensitive to mains currents passing to ground
The idea of a proximity fuse had long been considered militarily useful. Several ideas had been considered, including optical systems that shone a light, sometimes infrared, and triggered when the reflection reached a certain threshold, various ground-triggered means using radio signals, and capacitive or inductive methods similar to a metal detector.
However "this fuse soon replaced the less reliable fuses which were made of straws or quills filled with black powder, thus greatly reducing the hazard of accidental explosions in mining or construction." [8] Word of the reliability of Bickford's safety fuse spread, and was soon in large demand across world markets. [9]
Another way to mitigate arc flash is to use a triggered current limiter [14] or commutating current limiter which inserts a low rated continuous current current limiting fuse that melts and interrupts the arc flash within 4 ms. The advantage of this device is that it eliminates the arc flash at the source and does not divert it to another ...
This simple form of burning fuse can still be found today in many modern fireworks. A version of this simple fuse is called visco fuse, and consists of the burning core coated with wax or lacquer for durability and water resistance. Early fuses for grenades also consist of a wooden plug with a longitudinal hole filled with a slow burning ...