Page 344 - Ferraz semiconductor DIN

Semiconductor fuses
Semiconductor (AC) fuses

®
Other Protistor Fuses
Ferrule Fuses
27x60 URQ/URS/URB - 690 V to 1000 VAC

Time vs current characteristics

a = 130 B1 = 1,25
a = 130 B1 = 1,25
A2 = 0,6 B2 = 0,6
A2 = 0,6 B2 = 0,6
Cf3 = 0,8
Cf3 = 0,8

125A 160A
4 URS
10

3
10

2
10

1
10

t (s) 10 0

-1
10

-2
10

-3
10

-4
10
2 3 4 5
10 10 10 10
I (A)
These curves indicate, for each rated current, pre-arcing time vs. R.M.S. pre-arcing current.
Tolerance for mean pre-arcing current ± 8%.

SCAC196 12/04