5
0,05
0,1
2
3
4
5
6
7
8
9
10
20
30
40
50
0,2
0,3
0,4
0,5
0,6
0,7
1
2
2
2
2
1,5
3
3
3
3
4
4
4
4
5
5
5
5
6
6
6
6
7
7
7
7
8
8
8
8
9
9
9
9
5
4
3
2
10
10
10
10
6
7
8
9
10
Ia
(kA)
12 kV
17,5-24 kV
N.
≤
5
0,05
0,1
2
3
4
5
6
7
8
9
10
20
30
40
50
0, 2
0, 3
0, 4
0, 5
0, 6
0, 7
1
2
2
2
2
1,5
3
3
3
3
4
4
4
4
5
5
5
5
6
6
6
6
7
7
7
7
8
8
8
8
9
9
9
9
6
7
8
9
10
Ia
(kA)
In = 1250 A
In = 630 A
VD4
- 12 kV, 630 A, 25 kA
- 12-17,5 kV, 1250 A, 25 kA
- 17,5 kV, 630 A, 20 kA
- 24 kV, 630 A, 20/25 kA
- 24 kV, 1250 A, 25 kA
≤
≤
5
4
3
2
10
10
10
10
N.
MEDIUM VOLTAGE PRODUCTS
23
—
7. Installation
7.2 Installation and operating
conditions
The following Standards must be taken into
particular consideration during installation and
service:
IEC60694/DIN VDE 0101
VDE 0105: Electrical installation service
DIN VDE 0141: Earthing systems for installations
with rated voltage above 1 kV
All the accident prevention regulations in force
in the relative countries.
7.2.1 Normal conditions
Comply with the recommendations in the
IEC 60694 and 62271-100 Standards. In detail:
7.2.3 Trip curves
The following graphs show the number of vacuum
interrupter closing-opening cycles (N.) allowed,
depending on the breaking capacity (Ia).
7.2.2 Special conditions
7.1 General
Correct installation is of primary
importance. The manufacturer’s
instructions must be arefully studied and
followed. It is good practice to use gloves
for handling the components during
installation. All operations required for
installation, putting into service, service
and maintenance must be carried out by
qualified personnel.
The areas through which power conductors
or auxiliary circuit conductors are routed
must be protected against the access of
animals which could lead to damage or
disservice.
Ambient
temperature
Maximum
apparatus for indoor installation
Humidity
The average value of the relative humidity, measured
The average value of the water vapour pressure,
The average value of the relative humidity, measured
The average value of the water vapour pressure,
Altitude
Installations over
1000ma.s.l.
Possible, within the limits allowed by the
reduction in the dielectric strength of the air
Increase in
the ambient
temperature
Reduction in the rated current
Encourage heat dissipation with appropriate
additional ventilation
Climate
To avoid the risk of corrosion or other damage
in areas:
with a high level of humidity, and/or
in the case of rapid and extensive
temperature variations, take appropriate
steps (for example, by using electric heaters)
to prevent condensation from forming
Please contact ABB for special installation
requirements or other operating conditions.
Figure 7a
Figure 7b
Key
N. Number of closingopening cycles allowed for
the vacuum interrupters.
Ia Breaking capacity of the vacuum interrupters.
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