Page 297 - Ferraz semiconductor DIN
P. 297
Semiconductor fuses
Semiconductor (AC) fuses
Protistor Square-body Fuses
®
PSC aR sizes 9x - 1500 VAC
Curves set
2
I t corrective K factor
URF/URG/URK URB/URH/URJ
K K
1,2 1,2
1 1
0,8 0,8
0,6 0,6
pI < 50 ln
pl > 50 ln
0,4 0,4
0,2 0,2
0 0
200 400 600 800 1000 1200 1400 1650 200 400 600 800 1000 1200 1400 1650
1500 1500
U (v) U (v)
U: R.M.S. working voltage V pI: Prospective Current in the fuse
2
K: I t corrective coefficient versus U
Arc voltage
URF/URG/URK URB/URH/URJ
Um (v)
Um (v)
3600
3200
2800 3200
2400 2800
2000 2400
2000
800 1000 1200 1400 1650
1500 800 1000 1200 1400 1650
U (v) 1500
Um: arc voltage U (v)
U: R.M.S. working voltage V
SCAC151
12/04
