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XNZN63(VS1)-12 Indoor High Voltage Vacuum Circuit Breaker


XNZN63(VS1)-12 indoor high voltage vacuum circuit breaker is used for 12kV electrical power system, working as the protection and control unit of power grid equipment and industrial and mining enterprises’ power equipment. It is especially applicable for occasions that demand frequent operations of rated working current or repeated breaks of short circuit current.

The operating mechanism and the body of the breaker adopts the one-piece design. Therefore, this series of circuit breaker can be fixed as an independent unit, or installed with a handcart.

Product introduction


Working Conditions:
1. Normal conditions
a) Ambient temperature
Highest temperature: +40℃
Lowest temperature: -15℃
b) Humidity
Average daily relative humidity: ≤ 95%
Average monthly relative humidity: ≤ 90%
Average daily vapour pressure: ≤ 2.2 x MPa
Average monthly vapour pressure: ≤ 1.8 x MPa
c) Altitude: not higher than 1500m
d) Earthquake intensity: not higher than 8°
e) Working site: no water dropping, no fire or explosion potential, no chemical or corrosive gas, no severe vibration
2. Special conditions:
This series of circuit breaker can also be used in other different conditions, after consistent agreement between client and manufacturer.



Technical parameters:
No.
Items
Units
Values
1
Rated Voltage
kV
12
2
Rated Insulation Level
1min Power Frequency Withstand Voltage
kV
42/48
Rated Lightning Impulse Withstand Voltage
kV
75/85
3
Rated Operation Sequence
 
0-t-co-t1-co*
Model
Rated Current
Rated Breaking Current (kA)
Rated Short Circuit Making Current (kA)
Rated Short Circuit Duration Time (s)
Number of Times of Breaking
Mechanical Life
VS1-12/M
630, 1250
20/20
50/63
4
100
40000
1250, 1600, 2000, 2500
31.5
80
4
50
40000
1600, 2000, 2500, 3150
40
100
4
30
40000


Mechanical parameters:
No.
Items
Units
Values
1
Clearance Between Open Contacts
mm
11±1
2
Contacting Travel
mm
3.5±1
3
Three Phases Simultaneity While Opening
ms
≤2
4
Contact Bounce Time While Closing
ms
≤2
5
Contacting Pressure of Contacts While Closing
N
20kA
25kA
31.5kA
40kA
2000±200
2400±200
3100±200
4750±250
6
Average Opening Speed
m/s
1.0 - 1.4
7
Average Closing Speed
m/s
0.6 - 0.9
8
Opening Time
ms
≤60
9
Closing Time
ms
≤100
10
Arcing Time
ms
≤15
11
Breaking Time
ms
≤65
12
Accumulated Erosion Thickness Limit of Moving and Fixed Contacts
mm
3


Technical parameters of permanent-magnet operating mechanism:
No.
Items
Units
Values
1
Travel of Movable Iron Core
Mm
35
2
Control Current While Closing
A
1A
3
Opening Current
A
2.6A
4
Rated Operation Voltage
V
DC220V

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