386
Semiconductor Fuses
DC Fuses
Ferrule Fuses 4000V DC
Time vs. current characteristics
t (s)
L/R (ms)
I (A)
I (A)
U (V)
DC application data
1 10 10 2 10 310 10 2 10 3 10 4
2000
2200
2400
2600
2800
3000
3200
3400
3600
3800
4000
90
80
70
60
50
40
30
20
10
0
10 4
10 3
10 2
10
1
10 -1
10 -2
10 -3
10 -4
10 4
10 3
10 2
10
1
10 -1
10 -2
10 -3
10 -4
0.8 1
1.5 2
3.154
5
Above: Curve indicates maximum permissible
value of time constant L/R as a function of DC
working voltage
1 : L/R = 45 ms
2 : L/R = 15 ms
Max. AC voltage (50/60 Hz): 4,000 V with interrupting
rating of 50 kA
Um(V)
U (V)
Peak arc voltage
vs. working voltage
0
1000
2000
3000
4000
6000
4000
2000
0
1
2
ELECTRICAL CHARACTERISTICS
68
10 12
16
20
Above: Curves indicate for various time constants L/R
the peak arc voltage, which may appear across fuse
terminals, vs. DC working voltage
a= 130
A2=0.6
B1= 1.25
B2= 0.6
Cf3= 0.8
a= 130
A2=0.6
B1= 1.25
B2= 0.6
Cf3= 0.8
± 10% tolerance for mean
pre-arcing current
Above, left and right: Curves indicate, for each rated current,
pre-arcing time vs. R.M.S. pre-arcing current