Page 337 - Ferraz semiconductor DIN
P. 337
Semiconductor fuses
Semiconductor (AC) fuses
Other Protistor Fuses
®
Ferrule Fuses
14x51 URGB & 22x58 URGA - 600 V to 690 VAC
Corrective factor - Peak arc voltage
Corrective factor Peak arc voltage
URGB URGB
K
Um(V)
1,2
2000
1
0,8
0,6
1000
0,4
0,2
0 200 400 600
U(V)
200 400 600 800
U(V)
URGA URGA
K
1,2 Um(V)
2000
1
0,8
Ip 50 In
0,6
1000
0,4
Ip > 50 In
0,2
0 200 400 600
U(V)
200 400 600 800
U(V)
These mean curves show the variation of the total This curve shows the peak value Um of the arc voltage
2
clearing time (I t ) and the total clearing duration t t which appears across the fuse link as a function of
t
as a function of operating voltage U. operating voltage U @ cos ϕ = 0.15.
SCAC189
12/04
