DC Ferrule Fuses
20x127
gR 1500V DC
SCDC9
Protistor DC fuses
Protistor DC fuses
12/04
t (s)
L/R (ms)
I (A)
U (V)
1 10 10 2 10 31 10 10 2 10 31 10 10 2 10 3
1000
1400
1800
2200
2600
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
68
10 12
1620
25
Above: Curves indicate maximum permissible value of time constant L/R as
a function of DC working voltage
Curve 1: gRD @ L/R = 30 ms
Curve 2: gRB @ L/R = 60 ms
Curve 3: gRD @ L/R = 15 ms
Curve 4: gRB @ L/R = 30 ms
Max. AC voltage (50/60 Hz):
2500 V with breaking capacity of 50 kA
Um(V)
U (V)
0
500
1000
1500
2000
4000
3000
2000
1000
gRB
gRD
1
23
4
0.8 1
1.5 2
3.15 4
5
0.8 1
1.5 2
3.15 4
5
Above: Curves indicate for various time constants L/R
peak arc voltage which may appear across the 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
a= 130
A2=0.6
B1= 1.25
B2= 0.6
Cf3= 0.8
± 9% tolerance for mean
pre-arcing current
Above: Curves indicate, for each rated current, pre-arcing time vs. R.M.S.
pre-arcing current.
DC applications data
Time vs. current characteristics
Electrical characteristics Peak arc voltage
vs. working voltage
gRB with trip indicator gRD without trip indicatorgRB without trip indicator
gRB - gRD from 0.8 to 25 A