The derating factors for energy storage series fuses, based on their operating current conditions and installation conditions, are broken down into the following factors:
Ambient temperature derating factor: Kc
Fuse busbar (cable) current density derating factor: Ke
Altitude derating factor (if applicable): Ka
Cyclic load derating factor: G In actual applications, the amplitude of the operating current flowing through the fuse is usually variable, often accompanied by the effects of cyclic loads such as overload, surge impact, or load current interruption; we generally refer to this type of operating condition as "cyclic load".
Impact of high altitude on fuse performance (Ka): IEC standards stipulate that the performance of fuses is unaffected at altitudes below 2000 meters: Above 2000 meters, for every 100 meters increase in altitude, the rated current of the fuse decreases by 0.5%.
