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October 07,2023

What is the reason for the malfunction of the fuse?power probe fuse voltage drop chart

　　　　1. Quality issues　　The quality of the fuse is very important. If the fuse installed in the circuit is of poor quality, it is easy for the fuse to malfunction after the circuit is connected and when the circuit is overloaded, resulting in the circuit being unusable or burned out.　　2. Model not suitable　　If the fuse model is not suitable, two situations will occur: ① When the rated current of the fuse is too low, it will be installed in the circuit and connected to the power supply. If the fuse blows, the circuit cannot be powered on and the equipment cannot operate normally. ② When the circuit is overloaded, it will not be able to fuse in a timely manner, which will not only burn out the circuit, but also easily cause fires and other accidents　　3. Aging, oxidation　　If the fuse is stored for too long or in an incorrect manner, it can lead to oxidation, aging, and unusable.　　When the fuse is oxidized, it can be seen that the packaging of the product has fallen off.　　4. Poor contact　　I

November 01,2023

Electric vehicle malfunctions due to lack of fuses or diodes

　　　　With the development of life, electric vehicles have also become popular. In order to facilitate people's travel, many families have started to use electric vehicles, which are convenient and affordable. However, there are still many unknown problems that arise during use. Today, the editor will briefly talk about the structural issues of electric vehicles.　　Accidents involving spontaneous combustion or even explosions in electric vehicles occur from time to time. If the cause of external open flames is excluded, the only reason for electric vehicle fires is a short circuit. Any short circuit in the battery, charger, or other components will turn the electric vehicle into a powder keg! How to solve it? (Related knowledge: What is the relationship between fuse material and fuse failure?)　　Installing a "fuse or diode" for an electric vehicle is the simplest solution, as the fuse or diode serves as a short-circuit protection. Someone has conducted experiments on an electric vehicle wi

August 13,2024

Principle of action of resettable fuse

　　　　The working principle of a resettable fuse is the dynamic balance of energy. The current flowing through the resettable fuse generates a certain degree of heat due to the thermal effect of the current (there is a resistance value in the resettable fuse). All or part of the heat generated is dissipated into the environment, but the remaining heat will increase the temperature of the resettable fuse element.　　During normal operation, the temperature is low and the heat generated and dissipated reaches equilibrium. When the resettable fuse is in a low resistance state, it does not work. When the current flowing through it increases or the ambient temperature rises, if the generated and dissipated heat reaches equilibrium, the fuse will remain inactive.　　If the current or temperature continues to rise at this time, the heat generated will be greater than the heat dissipation, causing a sharp increase in the temperature of the resettable fuse. Therefore, small temperature changes will l

August 03,2023

What is the principle and material of a fuse.mini blade fuse box

　　　　When current passes through a conductor, contact occurs and the conductor may generate heat because it has a certain resistance. And the calorific value is calculated according to this formula: Q=0.24I2RT.　　2. Among them, Q is a calorific value and 0.24 is a parameter. I is the current flowing through the conductor, R is the resistance of the conductor, and T is the time flowing through the conductor. By using this formula, you can easily discover the simple principle of fuses.　　When the raw materials and appearance of the fuse manufacturing are clear, its resistance R is relatively clear (if its resistance temperature coefficient is not considered). When an electric current flows through it, it becomes hot, and over time, its calorific value also increases.　　4. The height of current and resistance determines the speed of thermal energy, while the structure and assembly of the fuse determine the speed of thermal energy loss. If the speed of thermal energy is lower than the speed of

November 07,2023

bimetal thermostat for samsung refrigerator.Classification of Fuses and Fuses

　　　　Fuses are divided into two categories: high voltage and low voltage. High voltage fuses for 3kV-35kV; Low voltage fuses are used for AC 220V, 380V, and DC 220V, 440V.　　High voltage fuses are divided into indoor and outdoor types, and the model description is as follows:　　For example, RN1-3/150-200 is indoor. The rated voltage is 3kV, the rated current is 150A, and the breaking capacity is 200MVA.　　Indoor models include RN1, RN2, RN3, RN5, RN6, etc., outdoor models include RW3, RW4, RW10, etc., and DC electric vehicles use RNZ, RNZ1, etc.　　Low voltage fuses are commonly classified into three categories: plug-in, tubular, and spiral. It can also be divided into three types: open type, semi closed type, and closed type.　　The open type is not used alone and is often combined with a knife switch; One or both ends of the semi enclosed tube are opened, and the molten particles are sprayed out in a certain direction. Please pay attention to safety when using; Closed type commonly includes

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