Self Restoring Fuses for Overcurrent Protection of Explosion-proof Lamps
Explosion proof lamps should use self restoring fuses as over temperature and current protectors, which not only achieve the purpose of self resetting over current protectors, but also have low cost, maintenance-free, and long service life.
Due to the simple design of using self restoring fuses for overcurrent protection of explosion-proof lamps, only one component is required to complete the self resetting overcurrent protector function, with high reliability. Using a self restoring fuse is equivalent to replacing at least 6000 glass fuse tubes to complete the overcurrent protection task, greatly enhancing the market competitiveness of explosion-proof lamps due to the application of self restoring fuses.
Previously, explosion-proof lamps were mostly made from incandescent lamps and energy-saving lamps through special processes. Now, they have been converted to intelligent control technology products using LED. However, this intelligent LED explosion-proof lamp has one of the most easily overlooked problems, which is that it is easy to damage the LED lamp beads and their control circuit boards due to unstable voltage or lightning strikes.
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Temperature Characteristics of Current Fuses
Current fuses exhibit specific temperature characteristics that play a crucial role in their performance and reliability. The behavior of a current fuse in response to temperature changes is determined by several factors.
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Essential Knowledge for Selecting Automotive Fuses
When a certain overload current passes through, the heat generated is radiated to the surrounding environment through the melt and shell, and the heat dissipated through convection, conduction, and other means gradually reaches a balance with the heat generated. If the generated heat is greater than the dissipated heat, the melt temperature can increase； When the temperature reaches or exceeds the melting point of the melt, the melt melts, fuses, and cuts off the current, playing a role in safety protection of the circuit.
Selection of Current Fuses in Automotive Circuits
In automotive circuits, the selection of current fuses is of great significance for ensuring the safe operation of the vehicle. There are several key factors to consider when choosing a current fuse for an automotive circuit.
Explanation of Parameters in the PPTC Specification for Self Healing Fuses
This is very simple. As long as you know the meaning represented by the parameters in the specification book, you can clearly and quickly view the PTC specification book for self recovery fuses.
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A fuse refers to a self destructing fuse that experiences significant surges or other current exceeding limits in a circuit； In order to protect the components of other parts of the circuit where the fuse is located and the equipment is normal, the cost of replacing the fuse can be ignored compared to replacing the entire circuit that may be damaged. Due to the fact that fuses are a common element that needs to be replaced, we will introduce two basic concepts and provide a more in-depth introduction to fusion applications and testing and diagnostic methods.
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The encapsulation of current fuses is an important aspect that affects their performance, durability, and safety.
Self Recovery Performance and Working Process of Self Recovery Fuses
Traditional fuses are installed in circuits. When an overcurrent occurs due to a fault or abnormality in the circuit, the fuse itself melts to cut off the current and protect the circuit. However, due to the fact that traditional fuses can only protect once and need to be replaced if burned out, some products still cannot resume operation after troubleshooting or abnormal overcurrent disappears. As a new type of overcurrent protection device, the self-recovery fuse has the function of automatic recovery, which can meet the performance requirements of similar applications.
Electric Vehicle Malfunctions Due to Lack of Fuses or Diodes
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The Role of Current Fuses in Smart Meters
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Professional Knowledge of Self-healing Fuses
The operating principle of a self-healing fuse is a dynamic balance of energy. The current flowing through the self-healing fuse generates a certain amount of heat due to the thermal effect of the current (self-healing fuses all have resistance values), and the generated heat is completely or partially dissipated into the environment. The heat that is not dissipated will increase the temperature of the self-healing fuse components. The temperature during normal operation is relatively low, and the heat generated and dissipated reaches a balance.
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