Zhuhai Comking Electric Co.,Ltd.
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1.Description
CKVB-24/G is a solid insulated vacuum circuit breaker with epoxy resin pole and working in a voltage range maximum up to 24kV. The CKVB-24/G family includes CKVB-24/GB, CKVB-24/GE.
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 |
||||
|
Rated voltage |
kA |
24 |
||||
|
Rated short-time withstand voltage |
phase-to-phase phase-to-earth |
kA |
65 |
|||
|
open contact |
kA |
79 |
||||
|
Rated lighting impulse withstand voltage |
phase-to-phase phase-to-earth |
kA |
125 |
|||
|
open contact |
kA |
145 |
||||
|
Rated frequency |
Hz |
50 |
||||
|
Pole centre distance |
mm |
210, 230 |
||||
|
Rated current |
A |
630 |
1250 |
|||
|
Rated short-time withstand current(4s) |
kA |
25 |
31.5 |
25 |
31.5 |
|
|
Rated peak withstand current |
kA |
63 |
80 |
63 |
80 |
|
|
Rated short-circuit breaking current |
kA |
25 |
31.5 |
25 |
31.5 |
|
|
Rated short-circuit making current |
kA |
63 |
80 |
63 |
80 |
|
|
Rated breaking cable charging current |
A |
25 |
||||
|
Rated capacitor bank inrush making current |
kA |
12.5 |
||||
|
Rated single capacitor bank breaking current |
A |
630 |
||||
|
Rated back to back capacitor bank breaking current |
A |
400 |
||||
|
Operating sequence |
/ |
Opening-0.3s-Closing/Opening-180s-Closing/Opening |
||||
|
Mechanism life |
times |
20000 |
||||
|
Opening times for rated current |
times |
20000 |
||||
|
Opening times for rated short-circuit current |
times |
50 |
||||
|
Clearance between open contacts |
mm |
13±1 |
||||
|
Overtravel |
mm |
4±1 |
||||
|
Average closing speed |
m/s |
0.8～1.2 |
||||
|
Average opening speed |
m/s |
1.1～1.7 |
||||
|
Closing time |
ms |
35～70 |
||||
|
Opening time |
ms |
20～50 |
||||
|
Bounce time for contact’s closing |
ms |
≤2 |
||||
|
Asynchronous time for three-phase contacts closing / opening |
ms |
≤1 |
||||
|
Allowable accumulated wearing thickness of moving/fixing contact |
mm |
3 |
||||
4. Standard
----GB1984-2003
----IEC60056-2001
----GB/T16927-1997
----GB/T 4473-2008
----DL/T403-2000
----JB/T3855-2008