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For fuses, you should pay attention to its main eight parameters
Latest company news about For fuses, you should pay attention to its main eight parameters

1. Work current: In the environment of 25 ° C, the actual current with a rated current of less than 75%.


2. Use voltage: The rated voltage of the fuse should be greater than or equal to an effective circuit voltage.


3. Use ambient temperature: The higher environmental temperature fuse is relatively hot, and it will shorten the life of the fuse. Instead, the operating temperature is low, and the service life of the fuse will be extended.

 

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4. overload current and fuse time: also known as the time of fuse-current characteristics or I-T characteristics, or security characteristics. It is the main electrical performance index of fuse, which shows that the fuse is melted at the time range under different overload current loads. When the current flowing through the fuse exceeds the rated current, the melt temperature gradually rises, so that the final fuse is burned, and we belong to all overload.

 

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5. Broken capacity: The cover current of the fuse must be greater than or near the circuit's fault current. The division capacity is also called the maximum separation capacity or short -circuit division ability or cover current. It shows that under the specified voltage, the fuse can safely cut off the maximum current.

 

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6. Plug -in thermal energy value: It is an energy value required for fuse melting melting (the calculation formula is I²T). It is usually used to reflect the technical indicators of the rushing capacity of the fuse. Among them, i is overloaded and T is the fuse time. It indicates that the fuse is loaded with the current and time multiplication of the current in 0.008 seconds or within 0.008 seconds (the film fuse is 0.001 seconds or within it). It is a parameter of the fuse itself, and it is a constant for different fuses, controlled by the specifications of the fuse. Generally, the choice of fuse melting thermal energy value is that the application fuse must bear the large -current veins in a short period of time. These high -energy currents are described in different terms in terms of application, such as "population current", "start current", "influx current", and other similar intermittent currents.

 

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7. Physical size limit: such as length, diameter, height.

 

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8. Certification requirements: such as UL, CSA, VDE, METI, MITI, Mility.

Pub Time : 2023-02-28 16:31:12 >> News list
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