Zhuhai Comking Electric Co.,Ltd.
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1. Description
CKWZ is a three-phase AC outdoor vacuum circuit breaker maximum up to 24kV rated voltage and 50Hz rated frequency.
2. Working Condition
2.1 Ambient air temperature: -45℃～+40℃,daily range of temperature: diurnal variation 25℃
2.2 Relative humidity: daily average data ≤95%, monthly average data ≤90%
2.3 Seismic capacity: ≤magnitude 8, horizontal acceleration ≤ 0.4g, vertical acceleration ≤ 0.2g
2.4 Altitude: ≤1000m
2.5 Pollution classification: IV.
2.6 Wind speed: ≤35m/s
2.7 Applicable in the places without fire, without explosion risk, and without violent vibration
(Exceeding above working condition is available as customized product)
3. Technical Data
| Description | Unit | Parameter | |
| Rated voltage | kV | 12 | 24 |
| Rated frequency | Hz | 50 | 50 |
| Rated current | A | 630 | 630 |
| Rated short-time withstand current(4s) | kA | 20 | 20 |
| Rated peak withstand current | kA | 50 | 50 |
| Rated short-circuit making current(peak) | kA | 50 | 50 |
| Rated short-circuit breaking current | kA | 20 | 20 |
| Breaking times for rated short-circuit breaking current | times | 30 | 30 |
| Mechanical life | times | 10000 | 10000 |
| Power frequency withstand voltage(1min) | kV | 42/48 | 50/60 |
| Lighting impulse withstand voltage | kV | 75/85 | 125/145 |
| Clearance between open contacts | mm | 9±1 | 12±1 |
| Withstand voltage for secondary circuit (1 min) | V | 2000 | 2000 |
| Opening speed | m/s | 1.2±0.2 | 1.4±0.25 |
| Closing speed | m/s | 0.8±0.2 | 0.8±0.2 |
| Bounce time for contact’s closing | ms | ≤2 | ≤2 |
| Opening simultaneity for three-phase | ms | ≤2 | ≤2 |
| Loop resistance (without disconnector) | μΩ | <80 | <80 |
4. Standard
---- GB1984-2003
---- GB/T11022-2011
---- GB/T11023-1989
---- GB311.1-1997
---- DL/T593-1996
---- DL/T402-1999
---- GB/T3309-1989
---- DL403-1999
---- IEC62271-100