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Reduce Arc Flash Energies by Reducing Fuse Ampere Rating
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From Ferraz Shawmut
Current-limiting fuses can limit arc flash incident energy to low values provided that the arcing fault current exceeds the fuse's threshold current. Threshold current is defined as the lowest prospective rms symmetrical current at which the fuse will clear in less than 1/2 electrical cycle. By clearing in less than 1/2 cycle, the fuse limits both the peak instantaneous current (Ip) and the rms current (Irms) as seen in Figure 1. For a more in depth explanation of current limitation, refer to Ferraz Shawmut Arc Flash Note 2-Reducing Arc Energies with Current Limiting Fuses. Products & Services
Fuses protect electrical devices and components from overcurrents and short circuits that occur in improperly operating circuits.
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Fuse holders are devices for containing, protecting and mounting fuses. Blown fuses can be changed quickly and easily when used in conjunction with a fuse holder.
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Specialty electrical distribution and protection products are specialty or proprietary products related to electrical distribution and circuit protection.
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