The Impact of Fuse Aging on Usage
After the fuse ages, there is no danger of generating the current that should be cut off and the fuse not blowing. The aging of a fuse is equivalent to a decrease in the rated value (current) rather than an increase, resulting in the circuit being cut off at a small overload current or pulse.
The durability test in the IEC standard is the life test, which is conducted using a DC power supply at normal temperature:
a. Measure the voltage drop until the temperature stabilizes;
b. 1.2 times the rated current for 1 hour and cut off the current for 15 minutes. Cycle 100 times;
c. Measure the voltage drop after powering on for 1.5 In for 1 hour;
d. Measure the voltage drop using the same method as A.
Requirement: The voltage drop change before and after the test should not exceed 10%, and the identification should still be clear and distinguishable. There should be no deterioration in the end cap solder joints.
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目录- Company Profile Fuse User's Manual Fuse Auto Fuse Fuse Holder Thermostat
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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.
The Installation Precautions for Current Fuses
The installation of current fuses is crucial for ensuring the safety and proper functioning of electrical circuits. Here are some important installation precautions to keep in mind.
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.
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The encapsulation of current fuses is an important aspect that affects their performance, durability, and safety.
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The fuse is connected in series with the circuit, installed vertically, and installed on each phase line； Fuses are not allowed to be installed on the neutral line of a two phase three wire or three-phase four wire circuit.The power input terminal of the spiral fuse should be connected to the center point of the base, and the output wire should be connected to the threaded shell； This insurance is used in places with vibrations.
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