Page 287 - Ferraz semiconductor DIN

Semiconductor fuses
Semiconductor (AC) fuses

Protistor Square-body Fuses
®
PSC aR sizes 9x - 1500 VAC
Curves set

Times/Current Characteristics

URF URG

A
A
t (s) t (s)
4 B1 = 1,25 4 B1 = 1,25
10 10
a = 130 B2 = 0,6 C a = 130 B2 = 0,6
C A2 = 0,58 Cf3 = 0,8 A2 = 0,58 Cf3 = 0,8
10 3 10 3
10 2 10 2

-1 C' -1 C'
10 10 B
B
1 1

-1 -1
10 10
-2 -2
10 10

10 -3 10 -3
1 1
-4 -4
10 10
1 10 A' B' 100 1 10 A' B' 100
x.ln x.ln
t: actual prearcing time (s) (average value)
x:ln: R.M.S. value of prearc current in multiples of rated current

URK

A
t (s)
4 B1 = 1,25
10
C a = 130 B2 = 0,6
A2 = 0,58 Cf3 = 0,8
10 3
10 2

10 -1 C' B

1

-1
10

-2
10
10 -3
1
10 -4
1 10 A' B' 100
x.ln

SCAC152 12/04