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FWH-1000A

Bussmann
Part Number FWH-1000A
Manufacturer Bussmann
Description High Speed Fuses
Published May 31, 2012
Detailed Description High Speed Fuses Section Contents Page General Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . 88-89 ...
Datasheet PDF File FWH-1000A PDF File

FWH-1000A
FWH-1000A

Overview
High Speed Fuses Section Contents Page General Applications .
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88-89 North American fuses & accessories .
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90-106 Square Body fuses & accessories .
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107-180 BS 88 fuses & accessories .
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181-190 Ferrule fuses & accessories.
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191-212 High Speed Fuses www.
DataSheet.
co.
kr 87 Datasheet pdf - http://www.
DataSheet4U.
net/ High Speed Fuses General applications Rated Voltage The ac voltage rating of Cooper Bussmann® fuses is given in volts rms.
Fuses tested to IEC are tested at 10% above their rated voltage.
British Style BS 88 fuses are tested at 5% above its rated voltage.
UL recognition tests are performed at the rated voltage.
Rated Current Rated current is given in amperes rms.
Cooper Bussmann fuses can continuously carry the rated current.
Melting Characteristic The melting characteristic shows the virtual melting time in seconds as a function of the prospective current in amperes rms.
The fuses are specially constructed for short-circuit protection against high level fault currents.
Loading and operation of the fuse in the non-continuous/dashed section of the melt curve must be avoided.
The curve can also be read as the real melting time as a function of the RMS value of the pre-arc current.
Clearing Integrals The total clearing I t at rated voltage and at power factor of 15% are given in the electrical characteristics.
For other voltages, the clearing I2t is found by multiplying by correction factor, K, given as a function of applied working voltage, Eg, (rms).
2 104 6 4 2 103 6 4 2 102 6 4 2 Virtual Pre-Arcing Time In Seconds 101 6 4 2 100 6 4 2 10–1 6 4 2 10–2 6 4 2 10 –3 For other power factor values, the total clearing integral can be calculated as a multiple of the clearing integrals, the correction factor K and the correction factor X.
X 1.
0 0.
9 0.
8 Arc Voltage This curve gives the peak a...


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