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7T4-5 FRAME MCCB s - TYPICAL TIME/CURRENT CHARACTERISTICS
TECHNI CAL DATA
N MCCB
7T4 CURRENT CHARACTERISTICS
I
IR & II SET AT MINIMUM
CURRENT VALUE (A)
OHMIC VALUE
0.4
5
0.4
5
AMPS SECONDS SECONDS VOLTAGE SECONDS SECONDS
315
472.5A 472.5A 230V 0.487
Ω
0.487
Ω
630
945A
945A
230V 0.243
Ω
0.243
Ω
800
1200A 1200A 230V 0.192
Ω
0.192
Ω
1000 1500A 1500A 230V 0.153
Ω
0.153
Ω
IR SET AT MINIMUM & II SET AT MAXIMUM
315
2520A 724.5A 230V 0.091
Ω
0.317
Ω
630
5040A 1449A 230V 0.046
Ω
0.159
Ω
800
6400A 1840A 230V 0.036
Ω
0.125
Ω
1000 8000A 2300A 230V 0.029
Ω
0.100
Ω
IR & II SET AT MAXIMUM
315
4725A 1890A 230V 0.049
Ω
0.122
Ω
630
9450A 3780A 230V 0.024
Ω
0.061
Ω
800
12000A 4800A 230V 0.019
Ω
0.048
Ω
1000 15000A 6000A 230V 0.015
Ω
0.038
Ω
IR SET AT MAXIMUM & II SET AT MINIMUM
315
472.5A 472.5A 230V 0.487
Ω
0.487
Ω
630
945A
945A
230V 0.243
Ω
0.243
Ω
800
1200A 1200A 230V 0.192
Ω
0.192
Ω
1000 1500A 1500A 230V 0.153
Ω
0.153
Ω
ELECTRONIC TRIP UNIT SETTINGS
I
ADJUSTABLE SPECIFICATIONS
Order No.
Rated
Overload
Restart
Instantaneous
Current
I
n Protection
I
t
Short Circuit
Protection
I
A
A
kA
125, 137
0.5
144, 160
1
172, 180
1.5
200, 220 T
(0)
2
7T431/OR
315
231, 243 T
(t)
2.5
250, 260
3
275, 290
4
305, 315
5
250, 260
0.8
275, 290
1.5
305, 315
2
345, 360 T
(0)
3
7T463/OR
630
400, 435 T
(t)
4
455, 480
6
500, 550
8
575, 630
10
315, 345
1
360, 400
1.5
436, 455
2
480, 500 T
(0)
3
7T480/OR
800
550, 575 T
(t)
4
610, 630
6
685, 720
9
760, 800
12
400, 435
1.25
455, 480
2
500, 550
3
575, 610 T
(0)
5
7T410/OR
1000
630, 685 T
(t)
7
720, 760
9
800, 866
12
909, 1000
14
0.01
0.01
0.01
L
I
10
100
1000
10000
t
[s]
0.01
0.1
0.1
0.1
0.1
1
I
n=630A
I
n=1000A
I
n=1250A
I
n=1600A
15 A
63
80
1 0 A
I
n
= 315 A
I
n
= 630 A
I
n
= 800 A
I
n
= 1000 A
x
I
n
1 2
5
20
50
10
0.1 0.2 0.5
I
r
I
i
I
i
[kA]
I
i
[kA]
I
i
[kA]
I
i
[kA]
3
3
10 8.0 6.0
4.0 3.
0
2.0 1.5
0.8
1214 9.0
5.0 7.0
3.0
2.0
1.25
12 9.0
6.0
4.0 3.0
2.0 1.5
1.0
0.5
5.0 4.0 3.0
2.5
2.0 1.5
1.0
I
r
min.
max.