SF6 Circuit Breaker
Description & Application
VSB3-12 SF6 is a pole-mounted circuit breaker which uses SF6 as an arc extinction and insulating medium. At present, it is of the most superior cast performance among the 12kV outdoor circuit breakers, being the promotion products in urban power network & rural power network. It is suited for electrical power system in rated voltage 12kV and rated frequency 50Hz, which acts as control box to protect switch on middle-small scale power station and branch line.
Technical Parameter & Detail Show
Technical Parameter
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Item
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Data
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Remarks
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Rated Voltage (kV)
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12
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Rated Current (A)
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400
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630
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Rated Frequency (Hz)
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50
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Rated Insulation Level(kV)
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1 min Power Frequency Withstand Voltage (Virtual) |
Dry
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42 (phase to earth / phase to phase /across the isolating distance)
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Fill 0.25MPa SF6 Gas into Circuit Breaker (20℃)
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Wet
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34 (phase to earth / phase to phase /across the isolating distance) |
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Lightning Impulse Withstand voltage (Peak) |
75 (phase to earth / phase to phase /across the isolating distance) |
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Rated Voltage of Insulation Level under Zero Pressure in Voltmeter (kV) |
11.5 (Conductive Loop to Earth)
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Rated Short-Time Withstand Current (kA) |
8, 12.5
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16, 20
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Rated Peak Withstand Current (kA)
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20
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31.5
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40
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50
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Rated Short-Time Duration(s)
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4
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Rated Short-Circuit Breaking Current
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8
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12.5
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16
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20
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Rated Breaking Current of Different Earthing (kA) |
7
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10.9
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13.9
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17.3
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Rated Short Circuit Closing Current (Peak) (kA) |
20
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31.5
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40
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50
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Continuous Rated Short Circuit Breaking Current Time (times) |
16
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Rated Voltage of Insulation Level Under Zero Pressure in Voltmeter(kV) |
400
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630
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Rated Operation Sequence
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TypeⅠ
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Off-180s-On/Off-180s-On/Off
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Type Ⅱ, Ⅲ
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Off-0.5s-On/Off-180s-On/Off
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Duration of Reclose Without Current
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0.5
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On/Off Time (s)
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≤0.08
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Rated Rressure of SF6 Gas(MPa) |
0.35
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20℃
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Minimum Operating Pressure of SF6 Gas (Mpa) |
0.25
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20℃
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Closing Time(s)
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TypeⅠ,Ⅱ
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≤0.06
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Type Ⅲ
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≤0.08
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Opening Time(s)
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TypeⅠ,Ⅱ
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≤0.06
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Type Ⅲ
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≤0.04
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Mechanical Life (times)
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3000
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SF6 Gas Moisture Content in Circuit Breaker(ppm) |
≤150/300, Ex-Factory/Operation
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Volume Ratio
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Yearly Gas Leakage Rate of SF6
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＜1%
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Rated Voltage of On-Off Coil and Energy Storage Motor(V) |
AC220 or DC220
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Confirmed by User
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Current Ratio of Current Transformer (A/A)
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200/5; 400/5; 600/5(Routine)
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Confirmed by User
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Noise Level (dB)
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＜110
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SF6 Gas Weight for Each Circuit Breaker(kg) |
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1.2
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Gross Weight of Circuit Breaker (kg)
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TypeⅠ
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140
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Type Ⅱ,Ⅲ
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150, 160
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Dimension (L×D×H)
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Pollution Level Ⅲ
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1100×780×620
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Pollution Level Ⅳ
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1100×930×620
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Mechanism Included
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1 The simple structure and compact design of the three-phase in common tank presents different performances and installation methods.
2 VSB3-12 SF6 series circuit breaker can decrease operation power inside the tank, prolonging the mechanical life.
3 SF6 arc extinction uses rotation electric arc technology to improve the efficiency and electrical endurance.
Application Conditions
2 Ambient Temperature: -40℃~+40℃
6 Application Site: No danger of inflammability and explosion, chemical corrosion or violent vibration.
GB 1984-89
DL 402-91
1 Sea Way
2 Air Way
3 Express
1 PayPal
2 West Union
3 Wire Transfer
4 T/T
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