Page 117 - Ferraz semiconductor DIN

Protistor ®

Times/Current Characteristics size 2
315A
400A
350A
250A 450A
7000 a=130 Cut off characteristics - Peak let thru
5000 A 2 =0.75
current - size 2
3000 B 1 =1.25
2000 B 2 =0.80 for tp>100s 70000 450 A
B 2 =0.75 for 100≥tp≥5s 50000 400 A
1000 Im = 2.3 Ip
700 B 2 =0.60 for 5s>tp 30000 350 A
500 Cf 3 =0.80 20000
300 315 A
200 10000 250 A
100 Maximum peak let thru current (Im)(A) 7000
5000
70
50 3000
30 2000 Protistor ® Square-body Fuses: NH Plain Blades gS
Actual prearcing time (s) 10 7 5 3 2 700
20
1000
500
300
200

0.7 1 200 300 500 700 1000 2000 3000 5000 7000 10000 20000 30000 50000 70000 100000 200000 300000
0.5
50 Hz RMS Symetrical prospective current (Ip)(A)
0.3
0.2
0.1
0.07
0.05 Peak arc voltage vs applied AC voltage size 2
0.03
0.02
1600
0.01
0.007 1500
0.005
0.003 1400
0.002
1300
0.001
0.0007 1200
0.0005 1100
0.0003 Peak arc voltage (V)
0.0002 1000
900
300 500 700 1000 2000 3000 5000 7000 10000 20000 30000 800

RMS value of prearc current (A) 700
600

100 200 300 400 500 600 700
Clearing I²t and arcing time correction
Applied AC voltage (V)
factor vs Applied AC voltage size 2

1.3
1.2 1 Watts loss vs % rated current size 2
Clearing I 2 t and arcing time correction factor 0.9 Correction Factor for Watts Loss 0.8
1.1

0.8
0.7
0.6
0.6
0.5
0.4
0.3 0.4
0.2
0.2
0.1
100 200 300 400 500 600 700 50 60 70 80 90
Applied AC voltage (V)
% rated current

6