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TECHNI CAL DATA
N MCCB
80
7T4-5 FRAME MCCB s - TYPICAL TIME/CURRENT CHARACTERISTICS
7T5 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
630
945A
945A
230V 0.487
Ω
0.487
Ω
1000 1500A 1500A 230V 0.243
Ω
0.243
Ω
1250
1875A 1875A 230V 0.192
Ω
0.192
Ω
1600 2400A 2400A 230V 0.153
Ω
0.153
Ω
IR SET AT MINIMUM & II SET AT MAXIMUM
630
5040A 1449A 230V 0.091
Ω
0.317
Ω
1000 8000A 2300A 230V 0.046
Ω
0.159
Ω
1250
10000A 2875A 230V 0.036
Ω
0.125
Ω
1600 12800A 3680A 230V 0.029
Ω
0.100
Ω
IR & II SET AT MAXIMUM
630
9450A 3780A 230V 0.049
Ω
0.146
Ω
1000 15000A 6000A 230V 0.024
Ω
0.073
Ω
1250
18750A 7500A 230V 0.019
Ω
0.058
Ω
1600 24000A 9600A 230V 0.015
Ω
0.046
Ω
IR SET AT MAXIMUM & II SET AT MINIMUM
630
945A
945A
230V 0.487
Ω
0.487
Ω
1000 1500A 1500A 230V 0.243
Ω
0.243
Ω
1250
1875A 1875A 230V 0.192
Ω
0.192
Ω
1600 2400A 2400A 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
250, 260
0.8
275, 290
1.5
305, 315
2
7T563/OR
630
345, 360 T
(0)
2.5
400, 435 T
(t)
4.5
455, 480
6
500, 550
7.5
575, 630
10
400, 435
1.25
455, 480
2
500, 550
3
7T510/OR
1000
575, 630 T
(0)
5
630, 685 T
(t)
7
720, 760
9
800, 870
12
910, 1000
15
500, 550
1.5
577, 610
3
630, 685
5
7T512/OR
1250
722, 760 T
(0)
7
800, 866 T
(t)
9
909, 1000
12
1100, 1155
15
1200, 1250
18
630, 685
2
720, 800
4
870, 910
6
7T516/OR
1600
1000, 1100 T
(0)
8
1155, 1200 T
(t)
11
1250, 1300
14
1375, 1445
17
1500, 1600
20
3
3
I
r
I
i
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
630 A
1 0 A
1250 A
16 0 A
0.8
1.25
1.5
2.0 4.0 6.0 8.0 11 14 17
20
2.0
3.0 5.0 7.0 9.0 12 15 18
3.0 5.0 7.0 9.0 12 15
1.5 2.0 2.5 4.5
10
6.0 7.5
I
n
= 630 A
I
n
= 1000 A
I
n
= 1250 A
I
n
= 1600 A
x
I
n
1 2
5
20
50
10
0.1 0.2 0.5
I
i
[kA]
I
i
[kA]
I
i
[kA]
I
i
[kA]
I
r
min.
max.