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FRENCH CYLINDRICAL
URGD
SEMICONDUCTOR PROTECTION FUSES
K
U(V)
1,2
1
0,8
0,6
0,4
0,2
0
200
400
600
Um(V)
2000
1000
0
100 200 300 400 500 600 700
Um(V)
2000
1000
0
100 200 300 400 500 600 700
63 to 200A URGD
K
U(V)
1,2
1
0,8
0,6
0,4
0,2
0
200 300
100
400 500 600
63 to 200A URGD
These curves determine the
peak arc voltage across the
fuse terminals as a function of
the applied voltage.
Correction factor to
determine the clearing I
2t of
a fuse operating below its
rated voltage.
250A URGD
250A URGD
These curves indicate, for each rated current, the pre-arcing time vs. the R.M.S. pre-arcing current.
Tolerance for the mean pre-arcing current ± 8%
D 97
D
Melting Time-Current Data
Clearing I
2t vs. AC Operating Voltage
Peak arc Voltage
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