Page 18 - Ferraz semiconductor BS88

Semiconductor fuses
Semiconductor (AC) fuses

®
Other Protistor Fuses
BS88-4 Fuses
10x51, 17x49, 2X17x49, - 690 VAC

Times vs current characteristics

URE URS URT

16 20 25 32 35 40 45 50 55 63 75 80 65 75 85 90 110 140 150 160

• These curves indicate, for each rated current, the pre-arcing time vs. the R/M.S. pre-arcing current.
• Tolerance for the mean pre-arcing current ± 10%

Corrective factor - Peak arc voltage

URE
Corrective Peak arc
factor voltage

URS
URT

Corrective factor Peak arc voltage
* The mean curves show the variation of the total This curve show the peak value Um of the arc voltage
clearing time (I 2 t and the total clearing duration t t which appears across the fuse link as a function of the ope-
t)
rating voltage U @ cos ϕ = 0.15.
as a function of operating voltage U

SCAC212 12/04