Page 128 - Ferraz semiconductor DIN

Semiconductor fuses
Semiconductor (AC) fuses

Protistor Square-body Fuses
®
NH Plain Blades - 690 VAC
aR - 690 VAC sizes 000 to 3

Times/Current Characteristics

160 200 250 350 450 550 700 SIZE 2 SIZE 3
t (s) 315 400 500 630 t (s) 315 350 400 450 500 560 630 700 800 900 1000
4
10 10 4
a = 130 a = 130
B1 = 1,25 B1 = 1,25
3
10 A2 = 0,6 10 3 A2 = 0,6
B2 = 0,6 B2 = 0,6
2 Cf3 = 0,8 Cf3 = 0,8
10 10 2
C C' C C'
1
10 10 1
0
10 10 0
-1
10 10 -1
-2
10 10 -2
-3
10 10 -3

-4
10 10 -4
2 3 4 5 2 3 4 5
10 10 10 10 Ip (A) 10 10 10 10 Ip (A)
Cut off characteristics - Peak let thru current
Ic(kA) SIZE 2 Ic(kA) SIZE 3
5
10 10 5
Ic = 2.5 Ip Ic = 2.5 Ip 1000 900
Ic = 2 Ip
700
630 Ic = 2 Ip 800 700
550 630 550
450 500 500 450
400
400
350
4 350
10 250 315 10 4 315
200
160
3
10 10 3

2
10 10 2
6
6
10 2 10 3 10 4 10 5 10 Ip (kA) 10 2 10 3 10 4 10 5 10 Ip (kA)
2
Total I t and total operating time @ 690 V
SIZE 3
2 2 SIZE 2 10.0 ms (3.00 ms) 6.0 ms (0.80 ms) 2 2 10.0 ms (3.00 ms) 8.0 ms (1.60 ms)
I t(A s) 10.0 ms (5.00 ms) 8.0 ms (1.60 ms) 4.0 ms (0.40 ms) I t(A s) 10.0 ms (5.00 ms) 6.0 ms (0.80 ms)
6
10 10 7
700
630
560
500
5 450
10 10 6 1000
400 Value between 900
350 800
315
parentheses pertain 700
630
250 2
to prearcing I t 560
4 5 500
10 200 10
450
160 400
350
315
3 4
10 10
2 3 4 5 Ip (A) 2 3 4 5
10 10 10 10 10 10 10 10 Ip (A)
SCAC108 07/05