12kV Vacuum Circuit Breaker
VS1 ( ZN63(VS1)-12)12kV series of indoor MV vacuum circuit breakers are used in the indoor switchgear rated 12 kV, 50(60)Hz. They are suitable for making different types of loads and frequent operation, to protect and control the electric equipments in industrial & mining enterprises, power plants and substations.
The main electric conduction loop of the circuit breaker is casted with epoxy resin by APG technics, embedding its vacuum arc extinguish chamber and main loop as an integration. Thereby, its insulation performs with high strength, the size is small, and the surface of its vacuum arc extinguishing chamber avoids the influence of ambient environment, realizing the maintenance-free purpose.
Main features:
· small size,
· water-condensation proof,
· high insulation,
· pollution-proof,
· low resistance,
· free maintenance.
Normal Service Condition
· Ambient temperature: -15 +40
· Altitude: ≤1000m
· Relative humidity: daily average relative humidity ≤ 95%; monthly average relative humidity ≤ 90%
· Free from fire, explosion, heavy pollution, chemical corrosion and severe vibration.
· Earthquake intensity ≤ 8 degree
If the service condition differs from the above , the user should consult it with manufacturer.
Specification
|
No.
|
Item
|
Unit
|
Parameter
|
|
1
|
Rated voltage
|
kV
|
12
|
|
2
|
Rated frequency
|
Hz
|
50/60
|
|
3
|
Rated short-time power frequency withstand voltage(1 min)
|
kV
|
42
|
|
4
|
Rated lightning impulse withstand voltage
|
kV
|
75
|
|
5
|
Rated current
|
A
|
630
1250
|
630
1250
|
1250
1600
2000
|
12501600
20002500
3150
|
|
6
|
Rated short-time withstand current
|
kA
|
20
|
25
|
31.5
|
40
|
|
7
|
Rated peak withstand current
|
kA
|
50
|
63
|
80
|
100
|
|
8
|
Rated short-circuit breaking current
|
kA
|
20
|
25
|
31.5
|
40
|
|
9
|
Rated short-circuit making current
|
kA
|
50
|
63
|
80
|
100
|
|
10
|
Rated operating sequence
|
/
|
O-0.3s-CO-180s-CO
O-180s-CO-180s-CO40kA
|
|
11
|
Short-circuit current breaking times
|
times
|
274
|
|
12
|
Rated capacitor bank breaking current
|
A
|
630/400
|
|
13
|
Mechanical endurance
|
times
|
10000
|
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