ZW20-12 Type Outdoor HV Vacuum Circuit Breaker
General Description
ZW20-12 type outdoor pole- mounted vacuum interrupter to arcing,SF6 as insulating medium.12kv rated voltage and three-phase AC 50 Hz outdoor distribution equipment and maintly used to switching and making load current,overcurrent and short circuit current of power grid.
This type vacuum circuit breaker can be used for protecting, controlling in the frequent operation places of transformer substation, industrial and mining enterprises, rural power distribution system.It's equipped with controller to meet the requirements of distribution automation system.
Reference standard
GB/T11022-1999 Common technical requirements of high voltage switch equipment and control equipment
GB311.2-2002 Insulation coordination operation manual of high voltage power transmission and transformation equipment
GB/T4109-2008Insulation casing of AC Voltage more than 1000v
GB2706 AC High Voltage Electrical Equipment Dynamic and Thermal Stability Test Method
GB3309-1989 Mechanical Test Of High Voltage Switch Equipment at Normal Temperature
GB/T 8905-1996 Gas Manage And Testing Manu al Of SF6 Electric Equipment
GB1206-2006 current Transformer
Applying ambient conditions
a. Altitude above sea level:no more than 2000m:Pollution level:IV level.
b. Ambient temperature:-40ºC~+40ºC,and average temperature in 24hr should be no more than 25ºC
c. Wind speed is no more than 35m/s:earthquake intensity:no more than 8 degrees.
d. It should be installed in the places without inflammable,explosive,chemical corrosion.
Conditions of Use
Sea level:≤1000m(if increase the altitude, it will improve 12% every increase 1000m, rated insulator average level increase 12%)；
Ambient air temperature:+40℃,***-35℃；
Wind pressure:not over 700Pa(equals to wind speed 34m/s)；
Amplitude:without frequent convulsion；
Air pollute degree:Ⅲ grades；
Daily different temperature:not over 25℃
Note: Due to continuous product improvement, the dimensions provided in this sample are for reference only. If necessary, our company can design and produce according to user requirements. Please contact the company in time.
| # | Item | Unit | Data |
| 1 | Rated voltage | kV | 12 |
| 2 | Rated frequency | Hz | 50 |
| 3 | Rated current | A | 630,1250 |
| 4 | Rated short circuit breaking current | kA | 12.5,16,20,25 |
| 5 | Rated peak withstand current | kA | 31.5,40,50,63 |
| 6 | Rated short time tolerance current(4s) | kA | 12.5,16,20,25 |
| 7 | Rated short circuit opening and closing current | kA | 31.5,40,50,63 |
| 8 | Institution life | time | 10000 |
| 9 | Rated short open circuit current switch frequency | time | 30 |
| 10 | Rated current open circuit frequency | time | 10000 |
| 11 | Power frequency withstand voltage (1min): phase, ground/fracture | kV | 42/48 |
| 12 | Lightning shock withstand pressure(peak)phase, ground/fracture | kV | 75/85 |
| 13 | Power frequency withstand voltage of the secondary circuit) (1min) | kV | 2 |
| 14 | Net weight | kg | 140 |
·Order instructions:
1. The customer needs provide main parameters of the transformer (input and output voltage, capacity, loss, etc.)
2. Other customer requirements
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