Automatic fuses
Automatic fuses are also called MCBs, and they are often used to protect electrical installations from minor outlets and loads. In general, there is always some kind of security in your home's electrical installation. A fuse must protect the wiring in the electrical installation from overloads and short circuits. Wires go from the switchboard to your power output, such as a wall outlet. These wires direct the current from the electrical panel into the socket. You may have experienced that you have connected too many electrical items to the same group, and that the power has then gone. It is a protective mechanism from the fuse that ensures that there is no short circuit, meltdown or other overloads that can pose a fire hazard.
It is therefore very important that you choose the right type of fuse for your installation so that it can cut off the power from the cable before it melts.
Automatic protection or melt fuse?
There are two different types of fuses: melt fuses and automatic fuses. They have the same purpose; namely to turn off the power at too high a load, thereby preventing major damage in the event of a short circuit. However, the two types of fuses work differently: With a melt fuse, a thin wire is built in, which burns over - or melts before the wires, and thus the power is turned off before it overloads the wires. An automatic fuse, on the other hand, will be set to be able to draw a certain number of amperes, and in case of an overload, the automatic fuse will automatically disconnect the current to prevent damage. Therefore, if your automatic fuse turns off, you have the option to correct the problem - turn off one or more appliances and turn the power back on. So you do not have to change a fuse, as with a melt fuse.
Which automatic fuse should I choose?
Automatic fuses can be divided into three categories, based on how much overcurrent is needed for it to disconnect quickly. These three categories are classified as characteristics indicated by a letter. The letter is a standard for all manufacturers. These characteristics are as follows:
- B-characteristic - disconnects when exposed to 3-5 times the rated current
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- C characteristic - Disconnects
when exposed to 5-10 times the rated current
- D-characteristic - Disconnects when exposed to 10-20 times the rated current
In the Danish market, automatic fuses of C-characteristic are often used, and some actually think that it is a requirement, but it is not true. The most important thing is that you find an automatic fuse that fits your cables.
There are several things to consider when choosing your automatic fuse: - How much load you think you want to connect
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Maximum short-circuit level of the installation site
- The minimum level of short circuit to which the fuse must disconnect in the event of a fault.
- Your wishes for selectivity
It is especially relevant that you emphasize the minimum short-circuit current. If an error occurs in the installation, it is important that the automatic fuse is disconnected before damage occurs to persons or material. For it to be successful, both the short-circuit part and the overload part must be triggered by mistake in the installation. In short, it is important that even the smallest possible short-circuit current in the cable is enough to trigger the short-circuit part of your automatic fuse. It is therefore very important that you find out how big your wires are, and then buy an automatic fuse, which provides security against short circuits and overloads in relation to the size of the wires. <p style=""margin:0cm 0cm 0.0001pt"">
Automatic fuses increase safety
It's no secret that power can be fatal. Even the current flowing through your private home can cause severe damage to both people and property. Therefore, it is incredibly important that you make sure that safety is in order in connection with your electrical products.
With an automatic fuse, you are sure that safety is top notch. Precisely because the automatic fuse itself switches off if there is too much current running through the cables, it ensures that no dangerous situations arise with electricity in your home. <
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Bels are specialists
In addition to the fact that it is important to keep track of safety, it is also very important that you choose the right automatic fuse when installing one. The automatic fuse must fit the installation it is intended to protect. That is why we at Bels are always ready to guide you when choosing automatic protection. We have many types of fuses, and we can probably also find the one that suits your installation.