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<\/a>The importance of electric fuse<\/b><\/h2>\nThe presence of an electric fuse in electrical circuits has an important role in protecting all components of the circuit from any noticeable rise in the intensity of the current passing through it. <\/span><\/p>\nWhere the electric fuse is connected in series with the circuit to be protected from possible electrical faults.<\/span><\/p>\nThe location of the electrical fuse wire<\/span><\/p>\nThe idea of the work of the electric fuse<\/b><\/h2>\n
The idea of \\u200b\\u200bthe electric fuse is based on the fact that when<\/span> an electric current<\/span> of a value higher than the value of the designed fuse current is passed,<\/span> <\/p>\nThe wire inside the fuse bottle will melt as a result of the heating effect of the current, which leads to cutting the fusion wire and thus prevents the flow of electric current to the rest of the circuit components.<\/span><\/p>\nThe idea of the work of the electric fuse<\/span><\/p>\nCauses of electrical fuse damage<\/b><\/h2>\n
Fuse damage can be caused by the following reasons:<\/span><\/p>\n\n- The passage of a current higher than the value of the fuse current for which it is designed.<\/span><\/li>\n
- As a result of the contact of the two ends of the alternating current source or the occurrence of a short circuit within an electrical circuit.<\/span><\/li>\n
- Reverse the polarity of direct current (DC) by flipping the positive and negative terminals, Since there are sensitive electronic boards that cannot tolerate reversal of polarity,<\/span><\/li>\n
- Such as the panel of the air conditioner and some types of chargers that do not have the anti-polarity protection system.<\/span><\/li>\n<\/ul>\n
Advantages and disadvantages of electric fuse<\/b><\/h2>\n
Advantages:<\/span><\/p>\n\n- small size.<\/span><\/li>\n
- Cheap.<\/span><\/li>\n
- Easy to install.<\/span><\/li>\n
- It is available in different capacities and types.<\/span><\/li>\n
- No maintenance required.<\/span><\/li>\n
- Fast fusion compared to electric circuit breakers.<\/span><\/li>\n
- It has a dedicated DC type to protect the battery.<\/span><\/li>\n<\/ul>\n
Negatives:<\/span><\/p>\n\n- It is used only once before melting. So it must be replaced when it melts.<\/span><\/li>\n<\/ul>\n
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Fuse check steps<\/b><\/h1>\n
Fuse check steps<\/span><\/p>\nFuse check steps Sometimes you may need to check some parts in order to test them<\/span><\/p>\nTroubleshooting and troubleshooting with the multifunction meter.<\/span><\/p>\nThese are the tests you may want to pass, as a measure <\/span>Voltage<\/span> ,<\/span> resistance and<\/span> current<\/span> , you need<\/span> a multimeter<\/span> .<\/span><\/p>\n Therefore, if you want to<\/span> check the battery<\/span> or the fuse, the device for measuring and checking must be present.<\/span><\/p>\nLet’s get acquainted with the steps of checking the fuse step by step to make it simple for everyone to apply the steps in practice.<\/span><\/p>\nWhat is an electric fuse?<\/b><\/h2>\n
electric fuse Fuse) is a protection element whose function is to protect electrical appliances from malfunction or permanent damage. <\/span><\/p>\nThe purpose of its presence in the device is to disconnect the electrical source current from the device in case it is exposed to a short circuit or a sudden surge of current.<\/span><\/p>\n The fuse is called in Arabic: fuse or fuser.<\/span><\/p>\nTherefore, it has become necessary to acquire the skill of the electrical fuse test, <\/span><\/p>\nWhere it is checked by adjusting the multimeter to the position of the resistance and there are many steps that we will remember you in this article step by step.<\/span><\/p>\nelectric fuse<\/span><\/p>\nElectric fuse terminals<\/b><\/h2>\n
In the simplest form, an electric fuse consists of a wire made of a thickness appropriate to the ampere value it is designed for. <\/span><\/p>\nand two terminals to pass the current through,<\/span><\/p>\n The fuse must be chosen so that its current is higher than the current of the device or the load to be protected by a small percentage in the range of 10% to 20%, according to what is available in the market.<\/span><\/p>\nFuse check steps<\/b><\/h2>\n
There are several steps to check the fuse that must be followed:<\/span><\/p>\n\n- Placing the multimeter in a suitable place. Set it to the resistance check position using the indicator knob.<\/span><\/li>\n
- Place the cursor switch on the lowest resistance band (200 ohms), And if the device is of the automatic type, put on the resistance symbol only.<\/span><\/li>\n
- Put the fuse to be tested on an insulating object such as wood, for example. In order to avoid touching his limbs together.<\/span><\/li>\n
- Place the two ends of the multimeter probes parallel to the two ends of the fuse, without depending on the polarity, As shown in the picture.<\/span><\/li>\n
- There are two possibilities upon examination: The fuse is intact if a very small resistance value reading appears, and the reading may be close to zero. But if the resistance value is too high (infinity) then the fuse is damaged.<\/span><\/li>\n<\/ul>\n
Required tools (fuse with multimeter)<\/span><\/p>\nHow to check the fuse using a multimeter<\/span><\/p>\nThese steps that were mentioned in the steps for checking the fuse apply to all fuses, When you notice a damaged fuse, you must immediately replace it with a new one.<\/span><\/p>\nHow to check fuse step by step<\/span><\/p>\nIn the event that you wish to test any fuse while it is connected to a circuit, Be sure to turn off the power supply before testing, To avoid an electrical short.<\/span><\/p>\n![\"\"](\"https:\/\/www.gahzly.com\/wp-content\/uploads\/2021\/12\/%D8%A7%D9%84%D9%81%D9%8A%D9%88%D8%B2-%D8%A7%D9%84%D9%83%D9%87%D8%B1%D8%A8%D8%A7%D8%A6%D9%8A.jpg\" "\\"l\\"")
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DC fuses<\/b><\/h1>\n
DC fuses are used in many electronic circuits, the most important of which is to protect all<\/span> types of electric batteries,<\/span> especially<\/span> the car battery<\/span> . What are the DC fuses and their capacities, in addition to their role in protecting DC circuit systems.<\/span><\/p>\nWhat are DC fuses?<\/b><\/h2>\n
It is called by several other names such as: DC fuses, battery fuses, or Bosch Fuse).<\/span><\/p>\nDC fuses protect all DC circuits.<\/span><\/p>\n Such as:<\/span> solar energy systems<\/span> and car battery,<\/span><\/p>\n DC fuses are available in the market with various amperage capacities and voltages that are selected according to the current and voltage of the load to be protected.<\/span><\/p>\nVarious ampere capacities of DC fuses<\/span><\/p>\nDC fuse function<\/b><\/h2>\n
The function of these fuses is to protect the DC systems from short circuits, polarity changes, or the current value exceeding the permissible limit in the circuit.<\/span><\/p>\nThe protection process is carried out when<\/span> more than the required electric current<\/span> is passed through the fuse as a result of a malfunction.<\/span><\/p>\n This leads to damage or melting of the fuse and thus prevents the current from passing into the electrical or electronic circuit.<\/span><\/p>\nConnecting a DC fuse in the circuit<\/b><\/h2>\n
The DC fuses in the circuit are connected in series with the power source, for example, the battery.<\/span><\/p>\n In the case of series, we know that the current is indivisible, and therefore we guarantee the passage of the entire load current through the fuse, as shown in the following electrical circuit:<\/span><\/p>\nHow to connect a DC fuse inside the circuit<\/span><\/p>\nWhat is the difference between DC and AC fuse<\/b><\/h2>\n
The theory of operation of all types of fuses and their components is the same, but they differ in the method of design.<\/span><\/p>\n Whereas, DC fuses are larger in size, thickness and wire distance than AC fuses of the same power.<\/span><\/p>\nThe reason for this difference is the appearance of the electric arc resulting from constant DC current values. <\/span><\/p>\nTherefore, when the value of the DC current increases significantly, it causes a severe electric arc that can cause fires.<\/span><\/p>\nConversely with alternating current, The electric arc does not occur significantly in AC circuits because it is variable in value.<\/span><\/p>\n Thus, electric arc formation is not allowed.<\/span><\/p>\nDC fuse uses<\/b><\/h2>\n
DC fuses are used to protect electrical systems that operate on DC, including all cars, mechanisms, DC loads, solar panels, inverters, and all types of electric batteries. <\/span><\/p>\nMost devices that contain electronic boards are sensitive.<\/span><\/p>\nSMD fuses for short (Surface Mount Device) are also used specifically to protect laptops, cameras, and mobile phones internally, installed by manufacturers to protect certain functions.<\/span><\/p>\nelectric fuse<\/p>\n
Solar fuses<\/b><\/h1>\n
Solar fuses<\/span><\/p>\nSolar fuses, The fuse, in its simple general form, is a protection tool that separates the electrical circuit when the value of the current exceeds the value of the fuse current designed on it.<\/span><\/p>\nIt can be said that it is important in<\/span> the solar energy system<\/span> Especially to protect between: (panels and batteries), and between <\/span>Integrated<\/span> solar inverter.<\/span><\/p>\nThe difference between it and<\/span> circuit breakers<\/span> is that the fuse is faster in responding to the separation,<\/span> <\/p>\nBut it must be replaced after melting, <\/span><\/p>\nWhile the DC circuit breaker does not respond very quickly and is not sensitive to slight overcurrent, But it can be connected again after the bug is resolved without change.<\/span><\/p>\nDC fuses<\/b><\/h2>\n
First you should know that there are two types of fuses in terms of the type of current,<\/span><\/p>\n A type dedicated<\/span> to alternating current<\/span> and a type dedicated<\/span> to direct current<\/span> , and each of the two types has its protection areas, meaning there are fuses that bear the take-off current,<\/span><\/p>\n Others disconnect immediately as soon as a double surge of current is felt at any moment.<\/span><\/p>\nHence, we must pay attention to the type of fuse, and it is preferable to put the appropriate fuse in the appropriate place for the purpose of more accurate protection,<\/span><\/p>\n That is, if you want to install fuses to protect<\/span> the components of the solar system<\/span> , you must purchase PV solar fuses.<\/span><\/p>\nSolar fuse components<\/b><\/h2>\n
Solar fuses consist of two terminals and a connection base known as the holder or fuse, Dedicated to put the fuse inside. Fuse has no polarity (ie positive and negative electrodes).<\/span><\/p>\nFuse holder and fuse<\/span><\/p>\nChoosing the necessary solar fuses<\/b><\/h2>\n
The fuse is chosen based on two things: voltage and current.<\/span><\/p>\nThe fuse voltage should be at least 30% higher than the total voltage of the panels in series according to the recommendations (Volume 6 of IEC 60269-6) and UL 248-19 for the protection of photovoltaic units.<\/span><\/p>\nThe rated fuse current must be the same value as the maximum fuse current written on the data plate of one of the solar panels if connected in series, <\/span><\/p>\nWhich forms a continuous string according to the recommendations as well.<\/span><\/p>\nBut in the case of installing a protection fuse for the composite connection of the solar panels (series\/parallel) which is called the array,<\/span><\/p>\n The fuse current must be chosen so that its value is twice the value of the maximum fuse current for one panel.<\/span><\/p>\nThat is, if the value of the maximum fuse current written on the solar panel data card is 15A,<\/span><\/p>\n The fuse to be installed is 15A in the case of series connection, But in the case of the composite (array) connection, the fuse current must be chosen according to the sum of the conducting arrays.<\/span><\/p>\nSolar fuses<\/span><\/p>\nConnecting solar fuses<\/b><\/h2>\n
Connect the fuse in series to any load, solar panel or battery, where placed between <\/span>Solar panels<\/span> and<\/span> the charging regulator<\/span> , also placed between the batteries and the inverter, as well as with the charging regulator.<\/span><\/p>\n![\"\"](\"https:\/\/www.gahzly.com\/wp-content\/uploads\/2021\/12\/%D8%A7%D9%84%D9%81%D9%8A%D9%88%D8%B2-%D8%A7%D9%84%D9%83%D9%87%D8%B1%D8%A8%D8%A7%D8%A6%D9%8A-2.jpg\" "\\"l\\"")
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How to protect household electrical appliances<\/b><\/h1>\n
How to protect household electrical appliances<\/span><\/p>\nHow to protect household electrical appliances, Protecting electrical appliances is of the utmost importance that every home with an electricity subscription should have.<\/span><\/p>\nIn order to preserve household electrical appliances, additional protection devices must be installed for sensitive devices whose efficiency is reduced as a result of weak electricity or high voltage of the supplying source.<\/span><\/p>\n Follow us to find out how to protect household electrical appliances and what protections we need.<\/span><\/p>\nThe importance of protecting electrical appliances<\/b><\/h2>\n
Everyone seeks to protect household electrical appliances from any problems in the electrical wiring network, as well as from high and low voltage, especially sensitive devices such as computers and electric refrigerators.<\/span><\/p>\nThe goal of protection is to reduce maintenance costs for electrical appliances, as well as to stabilize the source of the electricity voltage and the safety of the home wiring network.<\/span><\/p>\nHow to protect household electrical appliances<\/b><\/h2>\n
There are important protections that it is preferable to have in order to protect household electrical appliances from any possible malfunction of the electricity network, whether from within the extensions or from the main line connecting to the house, <\/span><\/p>\n
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