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5.4. Fixed circuit-breakers
The fixed circuit-breaker (fig. 4/a paragraph 5.3.1) is the basic version complete with structure and front protection screen.
The fixing holes are made in the lower part of the structure.
The cord with the connector (18) (plug) for connecting the electrical accessories of the operating mechanism comes out of
connector (9). The earthing screw is placed in the rear part of the circuit-breaker. For further details, see the caption to figure
4/a in paragraph 5.3.1.
5.4.1. General characteristics of fixed circuit-breakers
General characteristics of fixed circuit-breakers (12 kV)
Circuit-breaker
Standards
Rated voltage
Rated insulation voltage
Withstand voltage at 50 Hz
Impulse withstand voltage
Rated frequency
Rated thermal current (40°C)
Rated breaking capacity
(symmetrical rated short-
circuit current)
Short-time withstand
current (3s)
Making capacity
Sequence of operations
Opening time
Arcing time
Total breaking time
Closing time
P P
Maximum
overall
H
dimensions
D
W
Weight
Standardized dimensions table
Operating temperature
Tropicalization
Electromagnetic compatibility
(1) For lower temperature please ask ABB.
26
26
IEC 62271-100 •
VDE 0671; CEI EN 62271-100 file 7642 •
Ur [kV] 12
Us [kV] 12
Ud (1 min) [kV] 42
Up [kV] 75
Isc [kA]
Ip [kA]
[O - 0.3 s - CO - 15 s - CO] •
H [mm] 461
W [mm] 450
D [mm] 464
Pole centre-distance P [mm] 150
IEC: 60068-2-30, 60721-2-1 •
IEC: 62271-1 •
eVD4 12
fr [Hz] 50-60
Ir [A] 630
630
16
16
20
20
25
25
31.5
31.5
—
—
16
16
20
20
Ik [kA]
25
25
31.5
31.5
—
—
40
40
50
50
63
63
80
80
—
—
•
[ms] 33 ... 60
[ms] 10 ... 15
[ms] 43 ... 75
[ms] 60 ... 80
461
570
483
210
[kg] 73
75
1VCD 000156
000157
[°C] - 5 ... + 40 (
)
1
630
1250
1250
16
16
16
20
20
20
25
25
25
31.5
31.5
31.5
—
—
—
16
16
16
20
20
20
25
25
25
31.5
31.5
31.5
—
—
—
40
40
40
50
50
50
63
63
63
80
80
80
—
—
—
•
•
•
461
461
461
700
450
570
483
464
483
275
150
210
79
73
75
000158
000156
000157
1250
16
20
25
31.5
—
16
20
25
31.5
—
40
50
63
80
—
•
461
700
483
275
79
000158
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