VSG type indoor high-voltage vacuum circuit breaker is suitable for switching various loads of different natures and frequent operations in power systems with three-phase AC 50Hz and rated voltage of 7.2kV-40.5kV. And the protection and control of electrical equipment in substations. It can be equipped with KYN28A and other mid-mounted handcart-type switchgear, and can also be equipped with XGN fixed switchgear.
VSG type indoor high-voltage vacuum circuit breaker complies with the national standard GB1984 “AC high-voltage circuit breaker”, JB/T3855 “3.6 ~ 40.5kV indoor AC high-voltage vacuum circuit breaker” and IEC60056 “high-voltage AC circuit breaker” standards. Meet the “10-35kV Indoor High Voltage Vacuum Circuit Breaker Ordering Technical Conditions”.
1. The ambient air temperature does not exceed 40℃, and the average value measured within 24h does not exceed 35℃.
2. The minimum ambient air temperature is -5℃ for the “-5 indoor” level, -15℃ for the “-15 indoor” level and -25℃ for the “-25 indoor” level. 15℃, and -25℃ for the “-25 house” level.
3. The effect of sunlight radiation can be ignored.
4. The altitude does not exceed 1000m.
5. The surrounding air is not significantly contaminated by dust, smoke, corrosive and/or flammable gases, vapors or salt spray.
|
No.
|
Item
|
Unit
|
Data
|
|
|
1
|
Rated voltage
|
kV
|
12
|
|
|
2
|
Rated frequency
|
Hz
|
50
|
|
|
3
|
Rated insulation level
|
1min power frequency withstand voltage
|
kV
|
42
|
|
Rated lightning impulse withstand voltage
|
kV
|
75
|
||
|
4
|
Rated current
|
A
|
630/1000/1250/1600/2000/2500/3150/4000
|
|
|
5
|
Rated short circuit breaking current
Rated short-time withstand current (virtual value)
|
kA
|
20/25/31.5/40/50
|
|
|
6
|
Rated short circuit making current (peak value)
Rated dynamic current(peak value)
|
kA
|
50/63/80/100/125
|
|
|
7
|
Rated short-circuit breaking current breaking time
|
Times
|
30,50
|
|
|
8
|
Rated thermal stability time
|
S
|
4
|
|
|
9
|
Rated operation sequence
|
|
O-0. 3s-CO-180s-CO
|
|
|
10
|
Mechanical life
|
Times
|
30000
|
|
|
11
|
Rated breaking current of single capacitor bank
|
A
|
630
|
|
|
12
|
The breaking current of single rated capacitance bank
|
A
|
400
|
|
|
13
|
The breaking current of rated back to back capacitance bank
|
s
|
4
|
|
1. VCB full type, main technical specifications, phase distance and quantity
2. Type and specification of service voltage
3. The name and quantity of spare parts
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