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5.4.4. General characteristics of withdrawable circuit-breakers for UniSafe switchgear
Circuit-breaker
Standards
Rated voltage
Rated insulation voltage
Withstand voltage at 50 Hz
Impulse withstand voltage
Rated frequency
Rated normal current
Rated breaking capacity
(rated symmetrical
short-circuit current)
Rated short-time
withstand current (3 s)
Making capacity
Operation sequence
Opening time
Arcing time
Total breaking time
Closing time
Maximum overall dimensions
Pole centre distance
Standardised table of dimensions
Operating temperature
Tropicalisation
Electromagnetic compatibility
(1) Rated uninterrupted currents guaranteed with withdrawable circuit-breakers installed
14
All manuals and user guides at all-guides.com
(40 °C)
in UniSafe switchgear with air temperature of 40 °C.
VD4/P 12
IEC 62271-100
CEI 17-1 (File 1375)
Ur [kV]
12
Us [kV]
12
Ud (1 min) [kV]
28
Up [kV]
75
fr [Hz]
50-60
(1) Ir [A]
630
1250
Isc [kA]
16
16
20
20
25
25
31.5
31.5
Ik [kA]
16
16
20
20
25
25
31.5
31.5
Ip [kA]
40
40
50
50
63
63
80
80
[O-0,3s-CO-3min-CO]
[ms]
40 ... 60
[ms]
10 ... 15
[ms]
50 ... 75
[ms]
60 ... 80
H [mm]
632
632
W [mm]
503
503
D
[mm]
664
664
I [mm]
150
150
TN7412 TN7412 TN7420 TN7420 TN7415 TN7415 TN7417
[°C]
– 5 ... + 40
IEC: 60068-2-30
721-2-1
IEC: 60694, 61000-6-2
61000-6-4
630
1250
1600
2000
16
16
–
–
20
20
20
20
25
25
25
25
31.5
31.5
31.5
31.5
16
16
–
–
20
20
20
20
25
25
25
25
31.5
31.5
31.5
31.5
40
40
–
–
50
50
50
50
63
63
63
63
80
80
80
80
632
632
690
690
503
503
653
653
664
664
642
642
210
210
210
210
2500
–
20
25
31.5
–
20
25
31.5
–
50
63
80
690
853
642
275
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