Ferraz - Efo-power.ru

emiconductor fuses
Semiconductor (AC) fuses
Protistor ® Square-body Fuses
PSC gR/aR sizes 000/00
gR/aR - 500 to 690 VAC DIN 000
DC Application data
100
90
80
70
60
50
40
30
20
10
0
L/R (ms)
d c b
a
0
100
200
300
400
500
600
700
U (V)
Above: Curves indicate permissible value of time
constant L/R as a function of DC working voltage.
Curve a: Ratings from 20 to 160 A
Curve b: Rating 200 A
Curve c: Ratings from 250 to 315 A
Curve d: Ratings from 350 to 400 A
Current limitation curves
10 5
10 4
10 3
10 2
I C (A)
1400
1200
1000
800
600
400
200
0
Time vs current characteristics
Um (V)
L/R =80 ms
L/R =25 ms
L/R =10 ms
0
100
200
300
400
500
600
700
U (V)
Above: Curves indicates peak arc
voltage Um which may appear across
fuse terminals at working voltage U.
Below: Curves show, for each rating, value of peak let-through current
Ic as a function of available fault current Ip.
Ic = 2.5 Ip
Ic = 2 Ip
gRB
125 A
100 A
80 A
63 A
50 A
40 A
32A
25 A
20 A
URB
Ic = 2.5 Ip
Ic = 2 Ip
Ip (A)
400 A
350 A
315 A
250 A
200 A
160 A
125 A
100 A
80 A
10 2 10 3 10 4 10 5 10 6 10 2 10 3 10 4 10 5 10 6
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
Rated
current (A)
20
25
32
40
50
63
80
100
125
160
200
250
315
350
400
Ipm values give minimum
DC interrupting current in amps.
Watts loss
P/Pn
Curve
a
a
a
a
a
a
a
a
a
a
b
c
c
d
d
0.5
0.6
0.7
0.8
0.9
1.0
1.1
Ipm (A)
60
65
90
120
150
200
270
370
500
700
1200
1800
2200
2600
3100
I/In
Above: Curve enables computation of
power losses P for a IN-rated fuse as a
function of R.M.S. current I
(as a multiple of IN for steady state
operation)
Left: Curves show,
10 -4
t (s)
gRB
t (s)
URB
10 4
10 4
10 -4 for each rated
10 3
current, pre-arcing
a= 130
10 3
a= 130 time vs. R.M.S.
10 2
A2=0.6
A2=0.6 pre-arcing current
B1= 1.25
B2= 0.6
10 2
B1= 1.25
B2= 0.6
Cf3= 0.8
Cf3= 0.8
C
C'
10
10
C C'
1
1
10 -1
10 -1
Tolerance for
10 -2
10 -2
mean pre-arcing
current ± 8%.
10 -3
10 -3
10 10 2 10 3 10 4 I (A) 10 10 2 10 3 10 4 10 5 I (A)
20 25
32 40
50 63
80 100
125
100
125
160 200
250
315
350
400
80
SCAC54
12/04