Page 324 - Ferraz semiconductor DIN

Semiconductor fuses
Semiconductor (AC) fuses

Other Protistor Fuses
®
Ferrule Fuses
14x51 gRC(URC) - 600 V to 690 VAC

Total clearing I t I t corrective factor
2
2
K
I t (A s)
2
2
1.4
10 5 1.2 1 2 Mean curves showing
10 ms (5 ms) 10 ms (2,8 ms) 8 ms (2 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) 1.0 var-iation of total clearing
time (I 2 t ) and total clea-
t
0.8
ring duration Tt as a func-
tion of operating voltage U.
0.6
10 4 1- 63 A rating - 600 V
0.4 2- 1 to 50 A rating - 690 V
0.2
50-63 A
0
10 3 40 A 0 200 400 600 800 U (V)
Peak arc voltage
32 A
25 A
20 A Um (V)
10 2 16 A
12 A 1600
2 Curves showing peak
10A
1400
8 A value Um of arc voltage
1
6 A 1200 which appears across
10 1000 fuse-link as a function of
operating voltage U @
10 10 2 10 3 10 4
Ip (A) 800 cos ϕ = 0.15
1-63A rating 600V
Horizontal curves show maximum values of total clearing I t (I t ) for each 600
2
2
t 2-1 to 50A rating 690V
rated current as a function of prospective current Ip @ 690 V. cosϕ = 0.15
(for 63 A @ 600 V. cosϕ = 0.15).
Oblique lines indicate total clearing duration Tt, with associated pre-arcing
duration in brackets.
0 200 400 600 800 U (V)
Current limitation curves
I (A) I (A)
C
C
10 4
Ic = 2.5 Ip Ic = 2 Ip 63
50
40
Ic = 2.5 Ip 25
32
20
12
10 3 Ic = 2 Ip 4 A 16
10
8
2 A 6
1 A

10 2

10

10 10 2 10 3 10 4 10 10 2 10 3 10 4
Ip (A) Ip (A)
Curves show, for each rating, value of peak let-through current IC as a function of available fault current Ip.

SCAC176 12/04