Semiconductor Semiconductorfuses (AC) fuses Other Protistor ® Fuses DIN Bracket Ferrule Fuses 17x49 gRB/URB - 690 VAC
Total clearing I2t
I2t corrective factor K
I2t (A2s)
1.2 1 ms (0,2 ms)
1,5 ms (0,3 ms)
2 ms (0,4 ms)
3 ms (0,6 ms)
(2 ms) (1,5 ms) (1,3 ms) (1 ms) (0,8 ms) ms ms ms ms ms 8 7 6 5 4
10 ms (5 ms)
10 5
10 ms (2,8 ms)
1.4
1.0
Left: Curve shows variation of total clearing time (I2tt) and total clearing duration Tt as a function of operating voltage U.
0.8 0.6
10 4
0.4
100 A 90 A 80 A 75 A
0.2
63 A
0
55 A 50 A 45 A 40 A 35 A 32 A
10 3
0
400
600
800
U (V)
Peak arc voltage Um (V)
25 A
10 2
200
20 A 16A
1600
12 A
Left: Curve shows peak value Um of arc voltage which appears across fuse-link as a function of operating voltage U@ cos ϕ = 0.15
1400
10
1200
10 3
10 4
Ip (A)
Above: Horizontal curves show for each rated current maximum values of total clearing I2t (I2tt) as a function of prospective current Ip. @ 690 V. cos ϕ = 0.15. Oblique lines indicate total clearing duration Tt and associated pre-arcing duration in brackets.
400
600 700
U (V)
Current limitation curves
IN=100 A, aR class with CC’ limiting curve.
10 4
IC(A) 5 10 5
Ip
Ic
=
90A-100A 80 A 75 A 63 A 55 A 50 A 45 A 40 A 35 A 32 A 25 A 20A 16 A 12 A
=
4 10 4
Ic
C C’
a= 130 A2=0.6 B1= 1.25 B2= 0.6 Cf3= 0.8
2. 5
10 3 10 2
200
Ip
12
t (s)
16 20 25 32 35 35 45 50 55 63 75 80 90 100
Time vs current characteristics
0
2
10 2
10
10 10 33 1 10 -1 10 -22 10 -2 10 -3
10 1
10
10 -4 10 10 2 10 3 Tolerance for mean pre-arcing current ± 9%.
10 4
I (A)
2
10 2
3
10 3
4
5
10 4
Ip (A) Above: Curves show, for each rating, value of peak letthrough current IC as a function of available fault current Ip.
Above: Curves indicate, for each rated current, prearcing time vs. R.M.S. pre-arcing current SCAC200
12/04