Zhuhai Comking Electric Co.,Ltd.
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1.Description
CKVB-12/G is a solid insulated vacuum circuit breaker with epoxy resin pole and working in a voltage range maximum up to 12kV. The CKVB-12/G family includes CKVB-12/GA, CKVB-12/GB, CKVB-12/GC, and CKVB-12/GD.
2. Working Condition
2.1Ambient air temperature: -25℃～+40℃
2.2Ambient humidity:
----relative average daily humidity: ≤95%
----relative average daily water vapor pressure: ≤2.2kPa
----relative average monthly humidity: ≤90%
----relative average monthly water vapor pressure: ≤1.8kPa
2.3Altitude: ≤1000m
2.4 Earthquake intensity: ≤magnitude 8
2.5 Ambient air doesn’t obviously pollute by dust, smoke, corrosive or combustible gas, vapors or salt spray.
(Exceeding above working condition is available as customized product)
3.Technical Data
|
Description |
Unit |
Parameter |
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|
Rated voltage |
kV |
12 |
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|
Short-time withstand voltage |
kV |
42 |
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|
Lighting impulse withstand voltage |
kV |
75 |
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|
Rated frequency |
Hz |
50 |
||||||||||||||||
|
Rated current |
A |
630 |
1250 |
1600 |
2000,2500 |
3150,4000 |
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|
Pole centre distance |
mm |
150 |
210 |
150 |
210 |
275 |
210 |
275 |
275 |
275 |
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|
Rated short-circuit breaking current |
kA |
25 |
31.5 |
25 |
31.5 |
25 |
31.5 |
25 |
31.5 |
40 |
40 |
31.5 |
40 |
31.5 |
40 |
31.5 |
40 |
40 |
|
Rated short-circuit making current |
kA |
63 |
80 |
63 |
80 |
63 |
80 |
63 |
80 |
100 |
100 |
80 |
100 |
80 |
100 |
80 |
100 |
100 |
|
Short-time withstand current(4s) |
kA |
25 |
31.5 |
25 |
31.5 |
25 |
31.5 |
25 |
31.5 |
40 |
40 |
31.5 |
40 |
31.5 |
40 |
31.5 |
40 |
40 |
|
Rated peak withstand current |
kA |
63 |
80 |
63 |
80 |
63 |
80 |
63 |
80 |
100 |
100 |
80 |
100 |
80 |
100 |
80 |
100 |
100 |
|
Operating sequence |
|
Opening-0.3s –closing opening-180s –closing opening |
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|
Opening time |
ms |
20～50 |
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|
Arc time |
ms |
≤15 |
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|
Closing time |
ms |
30～70 |
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|
Average closing speed |
m/s |
0.5～0.8 |
||||||||||||||||
|
Average opening speed |
m/s |
0.9～1.2 |
||||||||||||||||
|
Bounce time for contact’s closing |
ms |
≤2 |
||||||||||||||||
|
Asynchronous time for contact’s closing / opening |
ms |
≤2 |
||||||||||||||||
|
Allowable accumulated wearing thickness of moving/fixing contact |
mm |
3 |
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4.Standard
----GB1984-2003
----IEC60056-2001
----GB/T16927-1997
----GB/T 4473-2008
----DL/T403-2000
----JB/T3855-2008