Fuseholders for Cable
(90)The idea of using different types of fuses in a wide range of electrical and electronic applications has been known for a long time and is present in every new project or device. The simplest and in many respects most effective solution is the so-called overcurrent protection. If the device has a specific current rating, a sudden or long-lasting increase in this parameter may indicate a device malfunction. As a result, electronic devices, actuators, or wire insulation may catch fire. There can be many reasons for an increase in the current value, such as the seizure of the bearings, which, when blocked, start to draw continuously more current than the rated current (in the case of high shaft load), or a short circuit in the electronic part of the power supply of the device, caused, for example, by the breakdown of a rectifying diode.
Overcurrent protection devices, which are called circuit breakers, can be found in every household distribution board. In older installations, these can be D-type fuses or automatic fuses. Circuit breakers are reusable; just flip the switch back to protect the circuit again; panels in older houses use fuses. Although the latter are no longer used as overcurrent protection in modern household electrical installations, they are still widely used in electronic circuits.
The main component of the fuse, is a metal (usually made of copper) wire (one wire or several wires in parallel). Heat energy is generated across a wire due to the current flowing through it; this is related to current intensity. If this is too high, the amount of heat released will eventually melt the wire, which will consequently disconnect the current circuit.
Cable fuse and the type of electrical wire
If you are designing a device yourself or want to add a fuse to an existing machine that does not have such overcurrent protection, you can use, for example, cable fuse holders, i.e., the popular cable fuses. However, it should be borne in mind that we can only use it for a single conductor cable - it will be impossible to use it for multicore cables.
Selection of cable fuse
To select the right cable fuse you need to specify several criteria. The first of these is the outer diameter of the cable. Some cable fuses are supplied with pre-wired cables of the length and cross-section specified by the manufacturer. The most common sizes defining their conductor diameter range from 10 to 20 AWG (American Wire Gauge).
You also need to remember the rated voltage of the fuse holder. This is an especially important parameter that must be taken into account to maintain the safety of the device. These values will range from about 32 V to 600 V.The next key parameter is the current rating of the fuse holder. The higher the current, the larger the amount of heat generated. The current ratings can range from 1A up to 30 A. It is important that this value, assigned to a particular fuse holder, is at least equal, although it is recommended to be greater than the rated current of the fuse that will be used.Sometimes it may be important, especially when using such a fuse holder, to know the dimensions of the compatible fuse. Cylindrical fuses come in the following sizes: 5x20mm, 6.3x25mm, 6.3x30mm, or 6.3x32mm. Fuse cables can also differ in the fuse body material, colour, operating temperature, or contact material. This is usually less important information but is nevertheless worth knowing.
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