Protistor DC
Protistor DC fuses
fuses
DC Square-body Fuses
Sizes 120 to 123
gR 750V DC
Size 122
gRC-gRD from 250 to 500 A
Dimensions
Weight: 1300 g
Weight: 1150 g
Main Characteristics
Size Current
rating
IN( A )
Breaking
Capacity
Max. I
2
t
Watts loss
@ 900 V = L/R 40 ms
0.8 IN IN IP = 10 I
N P =
2
50 IN
(W)
(W)
(A
2
S)
(A S)
Designation
Ref.
Number
Catalog Number
250
315
350
400
450
500*
122
@750 V DC
100 kA
L/R = 100 ms
250 @ 900 V DC 25.5 46.7
315
100 kA
31.5 58
350 L/R = 40 ms 35 64.5
400
40.5 74.5
450
90
49
500*
95
52
25.5 46.7 1.25 10
6
31.5 58
2 10
6
35 64.5 2.5 10
6
40.5 74.5 3.1 10
6
90
49
4 10
6
95 6.2 10
6
*
52
1.25 10
6
2 10
6
2.5 10
6
3.1 10
6
4 10
6
6.2 10
6
*
250,000
400,000
500,000
600,000
800,000
1.2 10
6
*
250,000
400,000
500,000
600,000
800,000
1.2 10
6
*
CC 7,5 gRC 122 EF 0250
CC 7,5 gRC 122 EF 0315
CC 7,5 gRC 122 EF 0350
CC 7,5 gRC 122 EF 0400
CC 7,5 gRD 122 EF 0450
CC 7,5 gRD 122 EF 0500*
CC 7,5 gRC 122 TTF 0250
CC 7,5 gRC 122 TTF 0315
CC 7,5 gRC 122 TTF 0350
CC 7,5 gRC 122 TTF 0400
CC 7,5 gRD 122 TTF 0450
CC 7,5 gRD 122 TTF 0500*
A087331
B087332
W221141
L089388
P220951
Q220952
B090437
M085249
G220898
C090438
R220953
S220954
D122GC75V250EF
D122GC75V315EF
D122GC75V350EF
D122GC75V400EF
D122GD75V450EF
D122GD75V500EF
D122GC75V250TF
D122GC75V315TF
D122GC75V350TF
D122GC75V400TF
D122GD75V450TF
D122GD75V500TF
* Max. I2t @ 800 V=, L/R=40 ms and Breaking capacity = 100 kA @ 750VDC/50ms
Microswitch: MC 3E 1-5N Ref. Number: D310020
Pack:
1 piece
SCDC
24
12/04
Protistor DC fuses
DC Square-body Fuses
Sizes 120 to 123
gR 750V DC
Protistor DC fuses
Size 122
gRC-gRD from 250 to 500 A
Electrical characteristics
DC applications data
L/R (ms)
90
80
70
60
50
40
30
20
10
0
500
2
1
2400
2000
1600
1200
800
400
1000
1100
600
700
800
900
200
400
600
800
1000
0
0
1
2
Peak arc voltage
vs. working voltage
Um(V)
U (V)
U (V)
1: curve gRC - gRD 450A
2: curve gRD 500A
Above: Curves indicate maximum permissible value of time cons-
tant L/R as a function of DC working voltage
1: L/R = 100 ms
2: L/R = 40 ms
Above: Curves indicate for various time constants L/R
the peak arc voltage which may appear across fuse
terminals, vs. DC working voltage
Max. AC voltage (50/60 Hz):
1250 V with breaking capacity of 170 kA
Time vs. current characteristics
t (s)
250
315
350
400
450
500
gRC
t (s)
10 4
gRD
10 4
10 3
10 2
a= 130
A2=0.6
B1= 1.25
B2= 0.6
Cf3= 0.8
10 3
10 2
a= 130
A2=0.6
B1= 1.25
B2= 0.6
Cf3= 0.8
10
10
1
10 -1
1
10 -1
10 -2
10 -3
10 -4
10 -2
10 -3
10 -4
10 2
10 3
10 4
10 5
I (A)
10 2
10 3
10 4
10 5
I (A)
± 7% tolerance for mean
pre-arcing current
Above: Curves indicate, for each rated current, pre-arcing
time vs. R.M.S. pre-arcing current.
12/04
SCDC
25
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