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Training
IS THE PEAK CURRENT (CUT-OFF) IMPORTANT?
Short circuits are dangerous for several reasons:
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The destructive electrodynamics
effects increase as the square of the peak current value,
during the short circuit. |
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The destructive thermal effects increase
in proportion with the I2t reached during this
short circuit. |
Fuselinks are designed to drastically limit both these
effects. For the prospective short circuit current of 10,000
Amp rms with a totally asymmetrical current, the maximum value could
reach 25,000 Amp peak. A 100A gG fuselink limits the first peak
to 8,000 Amp, less than the third part of the prospective maximum
value. The destructive electrodynamic effects are reduced by 90%
(8,000/25,000)2.
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