Page 34 - Ferraz semiconductor BS88

Semiconductor fuses
Semiconductor (AC) fuses

®
Other Protistor Fuses
BS88-4 Fuses
36x55, 2x36x55 - 690 VAC

Corrective factor - Peak arc voltage

Corrective Peak arc Corrective Peak arc
factor voltage factor voltage

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

Curves and Ipm for each rating
DC Application data
Rated
Class Curve* I pm (A)
current
75 2 225
110 2 330
URR 200 2 600
250 2 750
200 2 600
235 2 700
URU 400 2 1200
500 2 1500
630 1 1890

• This curves indicate the permissible value of time constant L/R as a function of DC working voltage
• Ipm values give the minimum DC interrupting current in amps.

SCAC225
12/04