0034.5715.22

Fuses: 0034.5715.22 application field and working principle

An understanding of fuses is important to comprehend the electrical safety involved in electrical power distribution. An electrical fuse is an important device that is used to protect circuits and electrical equipment from the effects of an overload. A small fuse consists of a metal strip or wire fuse element, of small cross-section in comparison to the circuit conductors, mounted between a pair of electrical terminals. The fuse is arranged in such a way that during normal operation, there is no current flow through the fuse element. In the event of an overload caused by an external fault, the current through the fuse element increases, and if the value is above the rated value, the fuse element melts due to the high heat generated, thus opening the circuit and interrupting the electric flow.

The 0034.5715.22 specification standard is an important value in providing additional protection with fuse applications as it clarifies vital components of fuse implementation and aids the selection process of the best possible fuse application.

These values apply to standard fuse design, sized long enough to allow a large current but strong enough to melt quickly and interrupt the circuit in the event of an overload. It requires fuses to be designed through a set of criteria like maximum interruption time for selected currents, voltage/current derating curves, minimum melting time, and voltage drop curves. This sets the requirement for the fuse element to be designed at it most efficient, meaning in the event of an overload, the element will blow as safely and quickly as possible so possible damage to electrical circuits is minimized.

When making the selection for a fuse installation, the 0034.5715.22 sets a requirement for the fuse to be able to protect the electrical circuit from functioning currents up to 30 times the fuse heater rating. The fuse when subjected to selecting overloads must be able to interrupt this current in the following times: At sixty times the heater rating, the interruption time must be less than one millisecond and at eighteen times the heater rating the interruption time must be less than twenty-five milliseconds and this should be within fifty milliseconds for a two point fault. Fuses exceeding these criteria can be considered for installation.

The 0034.5715.22 is applicable to a wide range of power fuses with different configurations, ranging from DC, AC, or the combination of both. This standard applies for trade application fuses such as quick acting, time lag, and lower power fuses with AC ranges between 0 to 1000 volts and DC ranging from 0 to 400 volts. This standard was set with the intention of making sure that the maximum a fuse can support will not exceed the 30x specification.

The 0034.5715.22 specification standard is an important value that determines fuse safety. It sets criteria to regulate arc product duration, the melting time and other fuse specification that are needed to ensure that in an overload event, the fuse element will break the circuit quickly and thus save any possible damage to the electrical equipment that the circuit is meant to protect.