Page 5 - Ferraz semiconductor DIN

Semiconductor fuses
Semiconductor (AC) fuses

®
Protistor Square-body Fuses
PSC gR/aR sizes 000/00
gR/aR - 500 to 690 VAC DIN 000

Total clearing I t
2
I t (A s) 10 ms (2,5 ms) 6,5 ms (1,5 ms) 3,5 ms (0,8 ms) 2,5 ms (0,6 ms) 1,5 ms (0,3 ms)
2
2
10 ms (5 ms) 10 ms (2,5 ms) 8 ms (1,8 ms) 7 ms (1,5 ms) 6 ms (1,3 ms) 5 ms (1 ms) 4 ms (0,8 ms) 3 ms (0,6 ms) 2 ms (0,4 ms) 1,5 ms (0,3 ms) 1 ms (0,2 ms) gRB 10 6
2
2
I t (A s) 10 ms (5 ms) 8 ms (1,8ms) 6 ms (1,3 ms) 4,5 ms (1 ms) 2 ms (0,4 ms) 1 ms (0,2 ms) URB
10 5

10 5
315 A
250 A
4 125 A
10 200 A
100 A
160 A
80 A 10 4 125 A
63 A
3 100 A
10
50 A 80 A
40 A
3
32 A 10
2 3 4 5
25 A 10 10 10 10 Ip (A)
10 2
20 A
10 ms (5 ms) 10 ms (2,5 ms) 8 ms (1,8 ms) 7 ms (1,5 ms) 6 ms (1,3 ms) 5 ms (1 ms) 4 ms (0,8 ms) 3 ms (0,6 ms) 2 ms (0,4 ms) 1,5 ms (0,3 ms) URB
I t (A s)
2
2
10 6
10
10 2 10 3 10 4 10 5 10 6
Ip (A)
400 A
5 V) (à 500
Above: Horizontal curves show, for each rated current, values 10 350 A
of total clearing I2t (I2tt) as a function of prospective current
Ip. @ UN with cosj = 0.15. Oblique lines indicate total clea-
ring duration Tt, with associated pre-arcing duration in
brackets.
10 4

I t corrective factor
2
10 3
K 2 3 4 5
10 10 10 10
Ip (A)
1.4
1.2
Peak arc voltage
1
Um (V)
0.8
0.6 1400
0.4
1200
Left: Curve shows peak
0.2
1000 value Um of arc voltage
0 which appears across fuse
0 200 400 500 660 U (V) 800 link as a function of the
operating voltage
600 U @ cos ϕ = 0.15

Above: Mean curves show variation of total clea-
ring time (I2tt) and total clearing duration Tt as
a function of operating voltage U. 0 200 400 600 700 U (V)

SCAC53
12/04