Instant trends or pulse currents are used to describe any startups in the circuit. Inrush, waveforms caused by trend or transient current. For certain applications, pulse current is normal.
Therefore, it is important to be appropriate size to allow these pulses to pass through without opening or fuse components degenerate. Then, if the overload conditions continue, the fuse must be opened within the scope specified by the UL and CSA standards. The ability to resist the trend is a function of the fuse design and/or classification relative to the tidal pulse rush, the continuous frequency, etc.
The pulse current may not be enough to open the thermal energy of the fuse, but it may cause elemental fatigue and reduce the life of the fuse. For the appropriate size, the fuse and determine their surrogate capabilities, the pulse energy of the circuit should be determined and compared with the time curve of the fuse and the I2T rated value. The melting I2T value of the fuse must be greater than or equal to the pulse I2T multiplied by the pulse factors.
Contact Person: Mr. CK Loh
Tel: +86 188 139 15908
Fax: 86--755-28397356
