Protistor DC
Protistor DC fuses
fuses
DC Square-body Fuses
Sizes 120 to 123
gR 750V DC
Size 123
gRB-gRC-gRD from 500 to 800 A
Dimensions
Weight: 2100 g
Weight: 1900 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 IN P = 50 IN
(W)
(W)
(A
2
S)
(A
2
S)
Designation
Ref.
Number
Catalog Number
500
500
@ 750 V DC
100 kA
L/R = 100 ms
@ 900 V DC
100 kA
L/R = 40 ms
51
51
93.5
93.5
5 10
6
5 10
6
1 10
6
1 10
6
CC 7,5 gRC 123 EF 0500 M089389
CC 7,5 gRC 123 TTF 0500 D090439
D123GC75V500EF
D123GC75V500TF
maximum I
2
t (A
2
s)
@ 800 V = L/R 40 ms
IP = 10 IN IP = 50 IN
123
630
700
750
630
700
750
@ 750 V DC
100 kA
L/R = 50 ms
74
82
82
See max. operating
current next page
74
82
82
7.5 10
6
10 10
6
10 10
6
7.5 10
6
10 10
6
10 10
6
1.5 10
6
2 10
6
2 10
6
CC 7,5 gRB 123 EF 0630 B098556
CC 7,5 gRB 123 EF 0700 Q078191
CC 7,5 gRD 123 EF 0750 F220943
D123GB75V630EF
D123GB75V700EF
D123GD75V750EF
D123GB75V630TF
D123GB75V700TF
D123GB75V750TF
1.5 10
6
CC 7,5 gRB 123 TTF 0630 C098557
2 10
6
CC 7,5 gRB 123 TTF 0700 F090441
2 10
6
CC 7,5 gRD 123 TTF 0750 H220945
maximum I
2
t (A
2
s)
@ 660 V = L/R 30 ms
IP = 10 IN IP = 50 IN
12.15 10
6
12.15 10
6
2.6 10
6
CC 6.6 gRB 123 EF 0800 G220944
2.6 10
6
CC 6.6 gRB 123 TTF 0800 J220946
D123GB66V800EF
D123GB66V800TF
800
800
@ 660 V DC
100 kA
L/R = 50 ms
90
90
Microswitch: MC 3E 1-5N Ref. Number: D310020
Pack:
1 piece
SCDC
26
12/04
Protistor DC fuses
DC Square-body Fuses
Sizes 120 to 123
gR 750V DC
Protistor DC fuses
Size 123
gRB-gRC-gRD from 500 to 800 A
Electrical characteristics
DC applications data
L/R (ms)
90
80
70
60
50
40
30
20
10
0
500
1
2400
3
2000
1600
1200
800
400
0
1000
1100
600
700
800
900
200
400
600
800
1000
1
2
Peak arc voltage
vs. working voltage
Um(V)
1: curve gRC
2: curve gRB-gRD
3: curve gRB ( 800 A )
2
U (V)
U (V)
Above: Curves indicate maximum permissible value of time constant
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)
500
630
700 - 750
800
10 4
10 3
10 2
a= 130
A2=0.52
B1= 1.25
B2= 0.52
Cf3= 0.8
10
630
Current
700
rating
750
(A)
800
0
550
600
600
650
Maximum
operating
current
(A)
1
10 -1
10 -2
10 -3
10 -4
10 2
10 3
10 4
10 5
± 7% tolerance for mean
pre-arcing current
I (A)
Above: curves indicate, for each rated current, pre-arcing time vs. R.M.S. pre-arcing current
12/04
SCDC
27
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