6
5.2. Reference Standards
The VD4 circuit-breakers conform with the IEC
62271-100, DIN VDE 0670, CEI 17-1 file 1375
Standards and those of major industrialised coun-
tries.
5.3. Fixed circuit-breaker
The fixed circuit-breaker (fig. 4) is the basic ver-
sion complete with structure and front protection
screen. The fixing holes are made in the lower
part of the structure.
For the electrical connections of the circuit-
breaker auxiliary circuits, the terminal box (10)
is available (also see par. 7.8.1.).
The earthing screw is placed in the rear part of
the circuit-breaker. For further details, please see
the caption to figure 4.
5. Description
5.1. General
The VD4 series of circuit-breakers are pieces of
apparatus under vacuum for indoor installation;
for the electrical performances, please refer to
the corresponding technical catalogue code
1VCP000001.
For special installation requirements, please con-
tact ABB.
The following versions are available:
– fixed
– withdrawable for UniGear ZS1 type and UniSafe
switchgear.
Circuit-breaker
Standards
Rated voltage
Rated insulation voltage
Withstand voltage at 50 Hz
Impulse withstand voltage
Rated frequency
Rated normal current (40 °C)
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
5.3.1. General characteristics of fixed circuit-breakers
IEC 62271-100
CEI 17-1 (File 1375)
Ur [kV]
Us [kV]
Ud (1 min) [kV]
Up [kV]
fr [Hz]
Ir [A]
Isc [kA]
Ik [kA]
Ip [kA]
[O-0,3s-CO-3min-CO]
[ms]
[ms]
[ms]
[ms]
H [mm]
W [mm]
D [mm]
I [mm]
[°C]
IEC: 60068-2-30
721-2-1
IEC: 60694, 61000-6-2
61000-6-4
VD4 12
12
12
28
75
50-60
630 630 1250 1250 1600 1600 2000 2000 2500
16 16 16 16 – – – – –
20 20 20 20 20 20 20 20 20
25 25 25 25 25 25 25 25 25
31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5
16 16 16 16 – – – – –
20 20 20 20 20 20 20 20 20
25 25 25 25 25 25 25 25 25
31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5
40 40 40 40 – – – – –
50 50 50 50 50 50 50 50 50
63 63 63 63 63 63 63 63 63
80 80 80 80 80 80 80 80 80
40 ... 60
10 ... 15
50 ... 75
60 ... 80
461 461 461 461 599 599 599 599 616
450 570 450 570 570 700 570 700 700
424 424 424 424 424 424 424 424 424
150 210 150 210 210 275 210 275 275
TN7405 TN7406 TN7405 TN7406 TN7407 TN7408 TN7407 TN7408 TN7408
– 5 ... + 40
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